What kinds of organic fertilizers are there?
Commonly known as farmyard manure, it consists of various animal and plant residues or metabolites, such as human and animal manure, straw, animal residues, slaughterhouse waste and so on.
In addition, it also includes cake fertilizer (rapeseed cake, cottonseed cake, bean cake, sesame cake, castor cake, tea seed cake, etc. ); Composting; Composting; Manure; Biogas manure; Green manure etc.
Mainly through the supply of organic matter as a means to improve the physical and chemical properties of soil, promote plant growth and the cycle of soil ecosystem.
Some varieties of "generalized organic fertilizer";
1. Compost: It is a kind of fertilizer which is composed of various kinds of orange stalks, fallen leaves, grass, animal and plant residues, human and animal feces, etc. mixed with each other in proportion or with a small amount of soil for aerobic fermentation and decomposition.
2. Composting: Composting materials are basically the same as compost, but fermented under submerged conditions.
Manure: refers to the manure and straw padding of livestock and poultry such as pigs, cows, horses, sheep, chickens and ducks.
3. Biogas manure: In a sealed biogas digester, by-products produced by decomposition of organic matter include biogas slurry and residues.
4. Green manure: Use cultivated or wild green plants as fertilizer. Such as leguminous mung beans, broad beans, sweet clover, sesbania, alfalfa and vetch seeds. Non-leguminous green manure includes ryegrass, radish, sunflower seed, manjianghong, water hyacinth, water peanut and so on.
5. Crop straw: Crop straw is one of the important fertilizer varieties. Crop straw contains essential nutrients for crops, such as nitrogen, phosphorus, potassium, calcium and sulfur.
Under suitable conditions, these elements are mineralized and then returned to the soil through the action of soil microorganisms, which are absorbed and utilized by crops.
6, pure natural mineral fertilizer, including potassium ore powder, phosphate rock powder, calcium chloride, natural potassium magnesium sulfate fertilizer and other natural substances without chemical processing. Such products must pass organic certification and be produced in strict accordance with organic standards before they can be used in organic agriculture.
7. Cake fertilizer: rapeseed cake, cottonseed cake, bean cake, sesame cake, castor cake and tea seed cake.
Mud fertilizer: unpolluted river mud, pond mud, ditch mud, harbor mud, lake mud, etc.
What kinds of moles are there? Human skin tissue consists of epidermis, dermis and subcutaneous tissue, and there are pigment cells in the skin. Due to the differences in morphology and composition of different races, there are white, black, yellow and brown races. Any race can have moles. It is generally believed that the nevus cell nest originated from cryptochrome cells in epidermis, and some people think that neural crest precursor cells originated in embryonic period gradually migrated to the skin surface and progressed. Therefore, some moles have been born, commonly known as "fetal moles." What kinds of moles are there? According to the growth position of nevus in the skin, it can be divided into three kinds pathologically: borderline nevus, intradermal nevus and mixed nevus, which are three common nevus. Borderline nevus grows at the bottom of epidermis, which is smooth and hairless. Common in teenagers, rare in adults. Intradermal nevus is generally born in dermis, flat or nodular, with long hair, which is more common in adults. Mixed mole grows in the deep layer of epidermis and dermis, with a large hair area, which may be a transitional type from borderline nevus to intradermal nevus. Adult evolution tends to stagnate, so middle-aged adults are rare in mixed mole, and teenagers are more common. Compared with the three types of nevus, borderline nevus and mixed nevus may become malignant because of their borderline vitality, while intradermal nevus has no borderline vitality and generally does not become malignant. A non-malignant mole grows all the year round. It is painless and safe, and people will not regard it as a disease. However, it is not easy to treat moles that may become malignant. Because once pigmented nevus is transformed into malignant melanoma, the condition is very dangerous and the course of disease progresses rapidly, and it is often difficult to save lives because of the late diagnosis.
What kinds of cats are there? At present, there are four popular cat classification methods: 1, western breeds and exotic breeds. Classification of origin widely popular in the west. 2, purebred cats and hybrid cats. Classification according to the perspective of variety cultivation. 3. Domestic cats and wild cats. However, according to the living environment, there is no strict boundary between the two. 4. Long-haired cats and short-haired cats. Mainly classified according to the length of hair, for example, Persian cats and Himalayan cats are long-haired cats; Thai cats and Russian blue cats are short-haired cats. Non-purebred cats are the most common cats in the world, commonly known as domestic cats. There are all kinds of colors, but most of them are double * * *. Anyway, cats are all on this list as long as they can't find a breed. Non-purebred cats are smart, homesick, like catching mice and have many breeders. Abyssinia cat, also known as "rabbit cat", has an elegant figure and extremely rich facial expressions. It is red and yellow, gorgeous and extraordinary, attracting many cat lovers. Abyssinia cats are active and like to move freely, but they are smart and easy to tame. They can teach a lot of play movements and are suitable for breeding. Egyptian cats are slightly fat, with short legs and long stripes on their fur. They were regarded as god cats in ancient Egypt. Egyptian cats are friendly to people, lively and naughty, but sensitive. If left unattended, they can easily escape. Long-haired cat Long-haired cat's back hair is very long, generally 5 ~ 10 cm, which varies according to different seasons. Long-haired cats are large, docile and dependent, and like to be close to people. However, it is easy to shed hair and needs to be combed frequently, so it is difficult to raise it. Canadian hairless cats are funny and eccentric in appearance, almost hairless, slender in body, slender like a mouse's tail, and mostly gray and white in color. Canadian hairless cats are affectionate, quiet and kind to people, but they don't like being cuddled. Few people love it because of its strange appearance. California shiny cat origin California, USA, hybrid cat. Covered with leopard print, there are several kinds of fur such as gold, silver, blue and brown, and the appearance is very beautiful. California shiny cat is lively and lovely, smart and healthy, gregarious by nature, can get along well with other cats and even dogs, and is loyal to its owner. There are two kinds of curly cats: Cornish curly cats and German curly cats. They have slender bodies, big ears and short curly fur. Strange appearance. Curly cats are smart and naughty, warm to people and like to play, but they are afraid of cold and difficult to raise. Colette cat is native to Thailand, and its coat color is silver blue, also known as Thai silver cat. Because of its scarce production, it is more expensive. Shorter and fatter than siamese cats. Colette is quiet, but alert, and doesn't like strangers. Male cats are particularly aggressive. American short-haired cat, which originated in America, is a big cat with strong physique. Compared with English short-haired cat, its face and mouth are slightly longer and its stripes are more colorful. American short-haired cat is independent, but loves home, is good at running and catching mice, and is suitable for families with yards. Bengal cat is a hybrid of wild cat and domestic cat. Unlike other tabby cats, their spots are horizontally distributed, much like roses. Bengal cats are gentle and friendly, but because of their wild cat blood, they are easily excited and often make uncontrollable noises. A hybrid of Mengmaimao Burmese cat and American short-haired black cat. The coat is black and shiny, large and muscular. It's called "Little Panther". Contrary to its appearance, it is quite gentle, likes to associate with people and has rich feelings. When it is hugged, its throat will keep purring. European short-haired cats are similar in appearance to English short-haired cats, but they have no pedigree. Its body and face are slightly longer, its coat is short and thick, and its texture is brittle and easily broken. European short-haired cats are alert and sensitive, and have strong hunting skills. They are experts in catching mice. Scottish folded-ear cat is a beautiful and lovely cat. Its body, head and limbs are round, its tail is thick and short, its ears are flat, it is close to the skull, and its eyes are big and round. Scottish folded-ear cats are quiet, intelligent and tolerant. They can get along with children and are suitable for family rearing. The exotic short-haired cat is also called "short-haired Persian cat" in China. Except for its short hair, it has the same body shape, limbs, head, face and eyes as a Persian cat. Gentle and quiet, like to be close to people, but naughty and clever than Persian cats. Siamese cats are produced in Thailand, and there are also long-haired breeds in the same clan. No matter what color the coat is, the face, tail and limbs are dark, with a long figure, a long mouth and big ears. Siamese cats are very affectionate and loyal to their owners, but they are emotionally unstable and like to make a scene and make annoying noises. Singapore cats are small and exquisite in size and strong in muscle, belonging to the category of short cats. The heaviest male cat is rarely playful, curious, likes to drill around or even into the sewer, and is not loved. British short-haired cat British short-haired cat has a long history, but it didn't attract people's favor until the early 20th century. Cats are chubby, with short limbs, short and dense coat, big head and round face, and big and round eyes show various colors according to different coats. Cats are gentle and calm, friendly to people and easy to raise.
Adopt it
What kinds of horses are there? Mongolian Horse, Kazakh Horse, Hequ Horse, Southwest Horse, Sanhe Horse, Ilima, Vinblad, Netherlands, Baibuma.
About Mongolian horses
Mongolian horse is one of the oldest horse breeds in China and even in the world. Mainly produced in Inner Mongolia grassland, it is a typical grassland horse breed. Mongolian horses are not big, with an average height of 120 ~ 135 cm and a weight of 267 ~ 370 kg. Strong body, strong limbs, strong constitution, big head, wide chest, short legs, developed joints and tendons. The coat is thick and complex in color. It bears hardships and stands hard work, is not afraid of cold, can adapt to extremely extensive feeding management, has strong vitality and can survive in harsh conditions. Has always been a good army horse.
About Kazakh horses
Kazakh horses produced in Xinjiang are also prototype horses. Its morphological characteristics are: medium-sized head, delicate and pretty, short ears. The neck is slender, slightly raised, the nail is high, the brooch is narrow, and the hind limbs are often knife-shaped.
About Hequma
Hequ Horse is also an ancient and excellent local horse breed in China, which is often used as a tribute in history. Originated in the grassland at the junction of Qinghai, Gansu and Sichuan provinces in the upper reaches of the Yellow River, it is named Hequma because it is located in the Yellow River. It is the largest excellent horse among the local breeds in China. Average height 132 ~ 139 cm, weight 350 ~ 450 kg. Hequ Horse has a slightly larger head, a slightly rabbit-headed nose, a wide neck, a straight trunk, a deep and wide chest and a strong figure, which has an absolute advantage in Lama.
About southwest horse
Southwest horses are distributed in Sichuan, Yunnan, Guizhou and Guangxi. It is characterized by its small size and easy access to mountain roads. Southwest horsehead is big, neck is high, mane, tail and mane are long. Good body structure, developed tendons and firm hooves. Good at climbing mountains and mountains, able to bear more than 100 kilograms, and travel 30 ~ 40 kilometers a day. It is a force that needs transportation very much in the southwest mountainous area.
What kinds of pumps are there? There are fresh water pumps, sewage pumps and vacuum pumps.
This is distributed by the media.
According to the structure, there are many other differences between centrifugal and non-centrifugal, so I won't say more below.
The valve switch is controlled by changing from normally open to normally closed or from normally closed to normally open.
Generally equipped with PLC or other things to control.
The signal is adjusted according to the switching conditions you need.
Equipment failure can be judged from the water quantity and motor, or it may be that the impeller of the pump is broken.
What kinds of flour are commonly used?
1, wheat flour, which is the most common white flour, is the main flour raw material for making pasta. Flour in the market is divided into high gluten flour, medium gluten flour and low gluten flour according to the strength of flour. High and medium gluten flour is generally made into noodles, jiaozi, steamed bread, etc. Low-gluten flour is generally used to make cakes and shortcakes.
2, corn flour, corn flour generally makes corn tortillas, steamed buns, cakes and other staple foods. You can also make corn flour buns, jiaozi and so on. Corn flour alone is generally difficult to form and needs to be mixed with ordinary white flour.
3, buckwheat flour, buckwheat flour is generally used to make handmade noodles, Daoxiao Noodles, etc.
4, bean flour, bean flour is generally mixed with wheat flour to make bean noodles and so on.
Probably the above, of course, the actual types of flour are far more than these.
What kind of motor can be divided into two categories, one is brushed, the other is brushless and toothless, and the other is brushless and toothless. Brushless motors are divided into brushless and toothless Hall motors. Common motors are: brushless toothless hub motor, brushless toothless hub motor, brushless toothless hub motor and side-mounted motor.
What kinds of fish are there? China is rich in freshwater fish resources, and the artificial breeding market is well supplied. Among them, carp, silver carp, grass carp and herring are the most common, in addition to eel and catfish.
Carp is a good freshwater fish with white scales and metallic luster, red tail, tender meat and delicious taste. Yellow River carp is particularly popular.
Grass carp, also known as grass green and yellow-brown, is one of the most productive freshwater fish. This kind of fish is characterized by fast growth, heavy weight and fat head, but its meat quality is rough, which is not as good as carp.
Silver carp can be divided into silver carp and silver carp (commonly known as chubby fish) Silver carp has light color, small scales, big head, fat meat, delicious taste and the fattest head, which is especially suitable for making casserole fish heads.
Carassius auratus, also known as golden crucian carp, is flat and wide in shape, with obvious hump on the back and small scales. It is characterized by tender meat and great taste, but it has many small thorns. Crucian carp is best for soup. Small crucian carp is suitable for crispy fish.
Black herring, also known as black fin, is a kind of tender meat in freshwater fish with cylindrical body length, black spines, milky white abdomen and full white meat. It contains a lot of fat, especially pectoral fins and head and tail. The lungs of herring are the most tender part of fish and contain a lot of fat. The famous dish "Burn Bald Lung" is made of herring's lung. When cooked, it is delicious while it is hot.
Eel, also known as long fish and eel, is long and thin, with thick head and thin tail, dark brown back, yellow abdomen and small scaleless eyes. This kind of fish is extremely delicate and delicious, and is regarded as the best fish.
Catfish, also known as soft-shelled turtle, is a kind of advanced tonic with tender meat and rich nutrition.
Ornamental fish refer to those fish with bright colors or strange shapes and ornamental value. There are usually three major strains, namely temperate freshwater ornamental fish, tropical freshwater ornamental fish and tropical seawater ornamental fish.
The freshwater ornamental fish in temperate zone mainly include red crucian carp, China goldfish and japanese koi. There are three series of tropical freshwater ornamental fish, one is lamp species, the other is angelfish and the third is arowana. Seawater ornamental fish mainly come from coral reef waters in the Indian Ocean and the Pacific Ocean, with a wide variety, unique sports colors and a primitive and mysterious natural beauty.
Keeping goldfish is one of people's general preferences. Since the late 1980s, the ornamental fish market in Guangzhou has gradually expanded. At that time, almost every household had fish tanks, and a "lion's head" ranged from tens of yuan to hundreds of yuan, which showed that it was a noble family. However, goldfish breeding is difficult, the survival rate is low and the process is complicated, and the number of fish farmers is gradually decreasing. The aquarium market focuses on breeding high-quality fish, which also makes the price of noble goldfish higher and higher. Koi fish became a goldfish star in the early 1990s, and an expensive koi fish sold for 1000 yuan and 10000 yuan. Influenced by Hong Kong and Taiwan, Arowana became famous overnight in koi fish, and sold for more than 30,000 yuan. However, in recent years, the prices of koi fish and Red Dragon have fallen back to a relatively stable level, and the price of an adult red dragon with superior posture, scale color and posture is only 10,000 yuan.
At present, the upstarts in the aquarium market are the "Flower Arhat" from Malaysia and the "Fluorescent Fish" from Taiwan Province Province. The status of koi fish and Arowana has been replaced by "Ocean's Arhat", and the price of dominant varieties has remained above 10,000 yuan, and there are also rare varieties with a price tag of over 6,543,800 yuan. "Fluorescent fish" is a new species introduced only at the beginning of this year. This kind of fish can emit faint fluorescence in dark environment. The price of small fish with a body length of less than two centimeters has actually reached the 90 yuan of existing fish, which can be divided into cartilaginous fish and bony fish. Fish is the oldest vertebrate. They inhabit almost all aquatic environments on earth-from freshwater lakes and rivers to saltwater oceans. There are about 24,000 kinds of fish in the world. Two-thirds of people live in seawater, and the rest live in fresh water. There are 2,500 species in China, of which 100 is a kind of medicine. Common medicinal animals are hippocampus, syngnathus, Monopterus albus, carp, crucian carp, sturgeon (swim bladder glue), Pseudosciaena crocea (otolith is brain stone), shark and so on. In addition, it is often used as raw material for pharmaceutical industry. For example, the liver of cod, shark or ray is the main raw material for extracting cod liver oil (vitamin A and vitamin D). Hydrolyzed protein, cytochrome C, lecithin and cephalin can be extracted from various fishes. The liver and ovary of puffer fish contain a lot of tetrodotoxin, which can be extracted to treat diseases such as neuropathy, spasm and tumor. The bile of big fish can be extracted as "bile pigment calcium salt", which is the raw material for artificial production of bezoar. Fish live in seawater or fresh water all their lives, and most of them have bodies and fins suitable for swimming. Breathe through the gills and prey on the upper and lower jaws. The beating heart is divided into atrium and ventricle. Blood circulation is single circulation. The appearance of spine and head makes fish develop into a vertebrate that can best adapt to life in water. This is because the depth of water is different, and the pressure is different everywhere. The sea level is 1 atmospheric pressure, while the deep sea area can reach 1000 atmospheric pressure. The salt content of fresh water and seawater ranges from 0. 00 1 ~ 7% from fresh water to salt water. In addition, with the different geographical environment, the temperature difference and oxygen content of water are also very different. Due to the diversity of these waters, water layers, water quality, biological factors and abiotic factors in water, the attitude structure of fish has undergone different changes to adapt to different external changes. Higher than rotifers. Fish is the largest phylum of vertebrates. From the perspective of animal evolution, this class is the beginning of the jaw, so it is the most primitive and oldest class in the jaw. This is the largest taxon in the subphylum of vertebrates. As early as Devonian, many marginal branches have been derived and evolved into various complex fish. The existing fish are divided into cartilaginous fish and bony fish. 1. Chondroid fish is the lowest group of existing fish, with about 200 species in the world and 140 species in China, most of which live in the ocean. Its main characteristics are as follows: ① There is no hard bone for life, and the endoskeleton is composed of cartilage. ② Most of the body surface is covered with scales. ③ The branchial interval is well developed and there is no gill cover. ④ Oblique caudal fin. This line is divided into two subclasses, Claudiobranchia and Holocephala. 2. teleost is the largest fish group in the world, with more than 20,000 species, most of which live in seawater and some in fresh water. Its main features are as follows: ① The bones are hardened into hard bones in different degrees. ② The body surface is covered with hard scales, round scales or comb scales, and a few species are degraded without scales. Mucous glands of the skin are well developed. (3) The branchial septum is partially or completely degenerated, and the gills are not directly open to the outside world, but covered by the bony branchial lid. The water flowing out of branchial fissure is discharged through the rear edge of branchial lid, and there are many swim bladders. (4) Fish tails are often straight, with original tails or crooked tails. ⑤ Most of them are fertilized in vitro, oviparous, and a few are abnormal. The earliest fish was a round-billed jawless fish that appeared on the earth during the Cambrian period 450 million years ago. Fish are easy to distinguish from each other in appearance. They constitute the largest group of vertebrates: there are 22,000 species of fish among 50,000 species of vertebrates. Not all animals that live in water are fish. For example, whales are mammals. However, all fish can adapt well to life in water. They move with their fins. Fish has two pairs of fins-pectoral fin and ventral fin, which are located in two parts of the body; There is also a tail fin, which grows at the tail; And depending on the species, there are one or two dorsal fins on the back and a gluteal fin on the buttocks. They have a bladder filled with gas, called swim bladder, which enables the fish to sink, float and keep their position in the water. Only rays and sharks do not have this organ. Fish also have gills for breathing, and most kinds of gills are covered by gill cover bones. Cheeks are located on both sides of the head and behind the mouth. They are used to filter the water swallowed from the mouth, get oxygen from the water, and then discharge the water from an opening called branchial fissure. The size of different kinds of fish varies greatly. Their bodies consist of three parts: head, trunk and tail. The skin is covered with scales of different sizes and numbers. There is an obvious line on each side called lateral line, which is a sensory organ and is used to determine the direction. The muscles of some teleost fish are separated by some tiny bones. The first fish that appeared on the earth had a round jawless mouth, and now only 70 kinds of such fish exist, forming jawless fish. Among these fish, lamprey is the most famous. They have no scales, thin and round, much like eels. Lamprey attaches itself to other fish through its mouth with sucker, and feeds on the blood of its host. Other fish are divided into two categories: bony fish and cartilaginous fish. A bony fish has a pair of bones. There are primitive bony fish in this fish, and only some bones are hard bones. For example, fish of the suborder Holoptera (including Echinodermata), lungfish and sturgeon (such as sturgeon) are different from the more evolved teleost in that the bones of teleost are completely composed of hard bones. As representatives of bony fishes, sea eel, sole and stickleback have different shapes, but they all have extremely symmetrical tail fins and are covered with tiny scales (with a few exceptions, including eels and some carp). Bony fish are divided into several types. Eels are some fish, and their larvae look very different from adults. Herring is a group of fish. Carp contains almost all freshwater fish. Perch and tuna are fish whose tail fins are supported by hard spokes. They are called "spiny fins" and constitute the largest bony fish. The skeleton of cartilaginous fish is completely composed of cartilage and strengthened by calcium. This kind of fish is mainly sharks and rays. Eel is a small fish with a flat body at birth and is called "Little Eel". When they are mature, they have long, smooth bodies, usually without scales, and continuous fins along their backs. Eels live in rivers and lakes in Europe and America. They migrate to the algae sea in the northeast of the North Atlantic West Indies, where they breed. They die after their cubs are born. On the way back across the Atlantic, the young eels showed their adult form, and on the way back, they also began to breed in the sargasso sea. Herring lives in the North Sea, the English Channel and the Baltic Sea. Adult fish have a pale abdomen and a dark blue or nearly black back. Like sardines and herrings, they live in groups, sometimes thousands of fish live together. For every fish, this is an effective self-defense method, because for a predator, only one target can be selected among many fish. When attacked, the fish disappeared almost immediately. There are thousands of kinds of carp, almost all over the world. These freshwater fish have large scales, and their teeth are not fixed on their chins, but on their throats. Their mouths can move forward to suck food. Many species of Cyprinidae mainly live in calm rivers, small ponds and lakes in Asia and Europe, and their shapes and colors vary greatly. Some species have only a few large scales (mirror carp) or almost no scales (grass carp). These fish breed easily, and breeders have created many varieties. Carp mainly feed on plants and invertebrates. The spawning season depends on the water temperature, not too cold (at least 20℃). Female fish lay hundreds of eggs, but most young fish become food for other fish and even adult carp at birth. Spiny fins appeared about 60 million years ago. Perch is a typical representative of this kind of fish. Their fins are supported by hard and sharp spokes, and there are thorns on their huge tail fins. Perch lives in lakes and rivers in Europe and North America. They eat invertebrates and small fish, including their own young fish. Other species of these fish live in the ocean, such as tuna and swordfish. They are powerful swimmers and can swim 100 kilometers per hour. Tuna can weigh up to 500 kilograms and is a carnivore. In fish, they have a unique ability to keep their body temperature higher than the water temperature. Their species include Pacific albacore tuna and Mediterranean and Atlantic bluefin tuna. Sharks and rays are the main representatives of modern cartilaginous fish, which may have appeared 465.438 billion years ago. As the name implies, their bones are made of cartilage. Cartilage is a flexible material, which will harden after calcium supplementation and be solid like bone. Chondroid fish thrive in temperate and tropical seas. They breathe through their gills in the water. Gills communicate directly with the outside world through several gill slits behind the head. There are about 550 species of cartilaginous fish, of which 370 species are sharks, and the others are basically composed of rays and rays.
What are the types of certificates? 1: General certificates: such as computer grade certificate, CET-4 and CET-6 certificate and CET-4 and CET-6 oral certificate. Although most schools have abolished the regulation of linking with degrees, these certificates are still valued by employers, so they become the first choice for college students' textual research. 2. English proficiency certificate: such as TOEFL score certificate, IELTS score certificate, English intermediate and advanced interpretation qualification certificate, etc. This kind of examination requires excellent English listening, speaking, reading and writing skills, and is the primary goal of college students who plan to study abroad and work in foreign companies. 3.IT competency certificate: such as national computer software professional technical qualification and grade certificate, ACCP software engineer, Microsoft system administrator (MCSA) certificate, etc. With computers and networks playing an increasingly important role in work, high-quality IT skills often become a "sharp weapon" for job seekers. 4. Professional qualification certificates: such as customs declaration certificate, documentary certificate, logistics qualification certificate, national judicial examination certificate, tour guide qualification certificate, civil servant certificate, etc. The subject qualification certificate has the widest scope and the most types.