I planted a walnut tree. How can I make it grow better? There are always black spots on the leaves.
I planted a walnut tree with three branches. Looks like a trident. OK or not? Look where your walnut tree grows. If there is enough space in the yard, these three branches can directly grow into main branches. If the angle is not very good, you can bury stones or branches in the ground and pull the angle with a rope. Trees will be more symmetrical and beautiful, with good light and more fruits. If the yard is narrow, I'm afraid the trunk of the walnut tree will get in the way in the future. You can cut off two branches that are not in good position after the germination begins next spring, and saw off the remaining branches at a proper height, so that new branches will grow at a higher position, and then leave three branches that are in good position and strong.
I planted a walnut tree and watered it every night. The leaves are beginning to wither these days. What happened? Walnuts are afraid of waterlogging, so it is enough to water them once a week in the morning. Watering them at night will soak the roots thoroughly, because the water will not evaporate at night.
A walnut tree is planted on the left side of my gate. Can it be planted to keep the wind and water from getting angry? Tang Ming's light, look down on spirit, look down on momentum. Don't stop Tang Ming. It is not good for the second child at home. Of course, it is best to look at the picture above. Planting trees on the roadside is good for retaining sand.
I just bought a walnut tree. How should I plant it? I. Cultivation techniques:
1. Planting time: Walnut is suitable for growing on warm sandy soil and black loam with deep soil layer and good drainage, and is suitable for planting on sunny slopes and leeward. To develop walnuts in barren hills, we must first build terraces, dig large fish scale pits and do a good job in soil and water conservation. Planting time: early planting in spring after soil thawing, early planting in autumn after defoliation and early planting after soil freezing, and early planting in autumn before soil freezing after defoliation. In arid areas in spring, autumn sowing has a higher survival rate than spring sowing. The second spring sprouted early and grew strong. Seedlings planted in autumn should be ridged to prevent drainage. Methods: The trunk of seedlings was bent into an arch to fix the soil, and the trunk was not exposed. The next spring, I broke through the ground and straightened the trunk.
2. Planting method: the taproot of walnut seedlings is very long, and the pit depth and width are 0.8- 1 m respectively. First, fill the topsoil and base fertilizer at the bottom of the pit, about 20 cm away from the pit surface. When planting, use scissors to cut off the seedlings with soaked roots and fully absorbed water, put them in the into the pit vertically, spread the roots around, then fill them until they are flush with the ground, then fill them with water and seal them.
Second, plastic trimming:
It is an important cultivation technique to make walnut bear fruit early, high and stable yield and reasonable shaping and pruning. The pruning period of walnut is different from that of ordinary fruit trees. This is done after the fruit is picked and before the leaves turn yellow. In North China, it is best to prune between "White Dew" and "Cold Dew". Pruning at this time, although the temperature is low, the wound heals slowly, but the nutrient loss is less. Young trees can be pruned early because they have no fruit, and they can start from the "Summer Festival". Spring pruning is generally carried out around the "long summer". It's too late, because the branches and leaves are too big and consume too many nutrients, which is not conducive to the growth of trees.
1, young tree pruning: mainly to cultivate tree skeleton, lay a good foundation, quickly expand crown, and promote early fruiting and high yield. The tree shape of walnut is generally sparse and scattered, natural and happy.
(1) Sparse layer dispersion: the central dominant tree is obvious, and 5-7 main branches are divided into 2-3 layers, so that there are many branches in the tree, the crown is large and the yield is high. The key points of plastic surgery are: setting the height of trunk 1.5-2.5 meters, poor soil conditions, keeping trunk low, and rationally allocating the position and direction of main branches. The main branch spacing1-1.5m should not be too close. The first of the three main branches of the base is about 1.5m away from the main branch. If it is too close, it will form a door side, and the branch spacing around the crown should be reduced. Attention should be paid to maintaining the growth advantages of major central branches. Under normal circumstances, you can't change your head easily, which is an important feature different from other fruit tree pruning.
(2) Natural joy: the central main stem is not obvious, with 2-3 main branches, showing a 2-fork or 3-fork structure. In order to accelerate the crown expansion of young walnut trees, increase the number of branches, and realize fruit setting and early high yield, summer pruning and autumn pruning can be used to promote more lateral buds to sprout new branches. In summer, when the growth of broken branches comes to an end, cut off the top 2-3 buds from the developing branches over 50 cm to promote the germination of lateral buds, enrich branches and increase the number of branches in the coming year. In autumn, the unfinished part at the top of the elongated developing branches or one-third to one-quarter of the branch length is cut off and cut on the plump outer buds in the middle and upper parts, so that the crown of the tree is expanded year by year and more developing branches are extracted. 1 year-old thin and weak branches that are too dense can be cut off appropriately.
2. Pruning of fruiting branches: The top bud of the fruiting mother branch of walnut is mixed flower bud, so it is generally not allowed to prune every branch, only the dense twigs, dead branches, disease and insect branches and overlapping branches are pruned, so as to make ventilation transparent and promote the growth of fully robust fruiting mother branches and developing branches.
(1) Pruning of fruiting mother branches: robust branches that grow around the crown 1 year are usually fruiting mother branches in the second year, and are generally not cut short. However, if there are too many fruiting mother branches, the crown will be closed, which will affect ventilation and light transmission. Therefore, it is necessary to prune some fine fruiting mother branches appropriately to stabilize the yield and promote the normal development of the tree.
(2) Pruning of extended branches: For the 15-30-year-old trees in full fruit, the 1 year-old extended branches extracted from the top of each main branch outside the crown can be cut short 2-3 buds below the terminal bud. If the top branches are not full, they can be cut off at the full buds to enlarge the crown and increase the fruiting parts.
(3) Pruning of long branches: Long branches are mostly germinated from hidden buds on the main branches of the inner room, which are more common in mature trees and aging trees. In the past, many people cut off contacts with the base, which is called "cleaning the room". In recent years, we have begun to use the fruits of long branches. According to the experience of Hebei, Shandong and other provinces, according to the growth position and growth intensity, the long branches in the open part of the inner chamber can be shortened by one-half to one-third, and fruiting branches can be formed after 2-3 years, which can supplement the gap, expand the fruiting range and achieve the purpose of three-dimensional fruiting.
(4) Pruning of drooping branches: retract at the bifurcation, and cut off dead branches of diseases and pests at the same time. Too dense drooping branches should be cut off year by year.
Walnut is a deep-rooted fruit tree, which needs deep and fertile soil and likes warm and humid climate. It is a semi-positive plant, and its pH value is 5.5 ~ 7.0, and 6 ~ 7 is the best. It is planted in low mountains with an altitude of 300 ~ 700 meters, with high and stable yield. The propagation of Carya cathayensis mainly depends on sowing and seedling raising. Can also be cut, roots or branches 1 ~ 2 years old. Transplanting and planting can be carried out after defoliation in autumn and before germination in the following spring, but planting in spring should be done sooner rather than later.
I planted a walnut tree in spring, and it grew several leaves. What happened if it didn't grow or die? The trees planted in that year will not grow too much, mainly to ensure survival and rooting. If the fixed stem level is higher, the growth of trees in that year will not be too great.
How to control black spot of walnut tree is a bacterial disease. The effective method is "agricultural streptomycin", combined with chelating copper preparation, and at the same time prevent and control other diseases.
In addition, the orchard should not be too dense, ventilated and reasonable load, which is helpful to reduce diseases.
Walnut and its diseases are mainly prevented, supplemented by treatment, and broad-spectrum fungicides are sprayed preventively in rainy season.
How to control the black spot of young walnut trees is because walnut has "bacterial black spot"
The disease mainly harms fruits, but also leaves, shoots and branches. Walnut fruit has small dark brown spots, which are only in the early stage of the disease, and the edge of this spot is not particularly clear. With the development of the disease, the lesion will gradually expand and even develop into internal nucleoli. However, if the peel has hardened, the disease will not be transmitted to the nuts, but will affect the growth speed and quality of walnut kernels. Feng Jian Road, a graduate student of China Agricultural University: The pathogen of bacterial black spot generally overwinters in the diseased branches, and it will occur seriously in the rainy and humid air next spring.
In addition, high planting density and poor ventilation and light transmission conditions are also important pathogenic factors. The first aspect is the management of common fruit trees. If planted in a large area, you can choose disease-resistant varieties. In addition, cultivation management should be strengthened, and farmyard manure should be applied when fertilizing. At the same time, if there are technical conditions in winter, the branches should be trimmed properly and planted closely to improve ventilation and light transmission conditions. After pruning, diseased branches, rotten fruits and diseased leaves with bacteria in the orchard should be removed in time. In many cases, germs spend the winter on weeds, so weeds must be removed to reduce the chance of disease. Secondly, in terms of chemical control, the effect may be obvious. If the orchard is sick, spray 3-5 degrees of Be- sulfur mixture once before germination in the following spring. After germination, spray Bordeaux solution or 72% agricultural streptomycin and edible powder, generally once every 15 days.
The production team planted a batch of walnut trees and red fruit books on the hillside. 95 walnut trees are twice as many as the mangrove trees, and 1455 walnut trees are more than the mangrove trees. Hello:
Solution: Suppose there are X mangrove trees and 2x+95 walnut trees.
2X+95-X= 1455
X+95= 1455
X= 1455-95
X= 1360
There are 1360 mangroves and walnut trees;
1360× 2+95 = 28 15 (tree)
How to control black spot on walnut trunk. 200-fold difenoconazole+thiram aqueous solution can control the spread at one time.