How to sow coriander in summer? Look at these indigenous tricks adopted by the older generation.

In hot summer, the first thing to do is to choose a good variety of coriander. Try to choose varieties with heat resistance, late bolting and fast growth, such as Beijing coriander and North China big leaf. When planting, you should also choose plots with fertile soil, good water and fertilizer conservation, irrigation in drought and drainage in waterlogging, preferably plots without coriander planted for more than 5 years. Apply 4000 kg of decomposed farmyard manure and cake fertilizer 100 kg to the first mu. The stubble of the previous crop should be cleaned up to reduce the occurrence of pests and diseases. When planting, the frame width is 1- 1.5m and the length is 8- 10m. Growing coriander in summer is not strict. Generally, it is sown in May to June, and harvested 40 to 50 days after sowing. Soak seeds before sowing to accelerate germination. Coriander sown by accelerated germination emerges evenly and quickly. The method is: soak the seeds in clear water for 24-30 hours, take them out and spread them on a wet sack with a thickness of 2-3 cm, and cover the wet sack to keep the seeds at a certain humidity. Stir 1~2 times a day, and germinate after 3~4 days. During germination, the temperature is kept at 20℃~25℃. It is better to sow coriander in summer. After sowing and emergence, the seedlings can cover the whole border, reduce water evaporation and reduce the surface temperature. When sowing, sow two beds first and leave one bed, put the covering soil of the first bed on the bed surface reserved at both sides for later use, fill it with water, sow evenly after seepage, and cover the soil for 2 cm after sowing. Then, the remaining empty beds are sown according to the method of the first batch of beds. The amount of seeds used per mu is about 2 kg. After all the broadcasts, there will be a crackdown to keep the soil moist. If the weather is dry and the soil moisture is low, which affects the emergence of seedlings, it can be watered once with small water. When the height of seedlings is 4~5cm, weeding should be done between seedlings, and the distance between seedlings should be 2~4cm. After thinning seedlings, use irrigated acres to apply thin fertilizer. When the seedling height is 7~8cm, the first topdressing should be carried out, and the amount of fertilization should be large, generally 20 ~ 30 kg ammonium sulfate per mu. In addition, the soil should always be moist and watered every 4~5 days. It's cool when the temperature is high. The harvesting time of coriander is not strict in summer, so it can be harvested in batches by thinning seedlings to facilitate plant growth. Coriander 1 summer cultivation techniques. Variety selection. Choose varieties with heat tolerance, late bolting and fast growth, such as Beijing coriander and North China big leaf. 2. Soil preparation and fertilization. Select plots with fertile soil, good water and fertilizer conservation performance, irrigation in dry season, drainage in waterlogging season and good air permeability, in which the planting time of coriander shall not exceed 5 years, and multiple cropping shall not be allowed. Every 667 square meters (1 mu), 4,000 kg of decomposed farm manure and 0/00 kg of cake fertilizer should be applied. The residues of previous crops should be removed to reduce the occurrence of pests and diseases. Deep ploughing, harrowing and ridging, width 1- 1.5m, length 8- 10m. 3. Soak seeds to accelerate germination. In summer, the sowing date of coriander is not strict. Generally, it is sown in May-June, and harvested 40-50 days after sowing. Before sowing, seeds should be soaked to accelerate germination, so as to ensure that seedlings emerge neatly and quickly. Germination accelerating method: soak the seeds in clear water for 24-30 hours, take them out and spread them on wet and pollution-free sacks with a thickness of 2-3 cm, and then cover them with wet sacks. When the temperature is 20-25℃, stir 1-2 times a day, keep a certain amount of water, and germinate and sow seeds after 3-4 days. 4. sow and protect seedlings. It is better to sow coriander in summer. After sowing, the seedlings can cover the surface, reduce water evaporation and reduce the temperature between the surfaces. The sowing method is "sow two beds first and leave one bed". Put the reserved covering soil on the reserved beds on both sides first, and then fill it with water. After water permeates, sow evenly. After sowing, cover with 2 cm soil, and then sow the remaining empty bed. The method is the same as the first sowing. The amount of seeds used per mu is about 2 kg. After all the broadcasts, there will be a crackdown to keep the soil moist. If the weather is dry and the soil moisture is low, it will affect the emergence of seedlings, and you can water it once. 5. On-site management. When the height of seedlings is 4-5cm, weeding should be carried out between seedlings to ensure the spacing between seedlings is 2-4cm. After thinning, combine irrigation and topdressing. When the seedlings grow to 7-8 cm high, apply fertilizer for the first time. At this time, the amount of fertilizer should be large, and 20-30 kilograms of ammonium sulfate should be applied per mu. Keep the soil moist, water it every 4-5 days, and shade it to cool down. In summer, parsley can be harvested in batches in combination with thinning seedlings. Planting method of coriander 1 Variety selection: select varieties with heat resistance, late bolting and fast growth, such as Qingyun big leaf coriander, Shandong big leaf coriander and Beijing coriander. 2. Soil preparation and fertilization: select loam land with fertile soil, good irrigation conditions and no coriander for many years. Apply 5000 kg of decomposed chicken manure, 20-25 kg of diammonium phosphate and 0/5-20 kg of potassium sulfate/kloc per mu. Chop and prepare the soil, turn the ground 20cm, and harrow it to a frame with a width of 1.2- 1.5m and a length of 10m. 3. Sowing time and method: Planting coriander in summer is not very strict with sowing time. Generally, it is sown in May-June, and harvested about 50 days after sowing. (Before sowing) soak the seeds in clear water for 24-28 hours, take them out, spread them on wet and pollution-free sacks with a thickness of 2-3cm, and cover them with wet sacks. Keep the temperature at 20-25℃, with the maximum temperature not exceeding 30℃, and turn over 1-2 times a day. It can germinate and sow in 3-4 days. There are two methods of sowing: drilling and sowing. The method is as follows: firstly, take a thin layer of covering soil in the border and put it aside for covering soil; Then flush and irrigate with sufficient water, and evenly sow after soaking; After sowing, the soil should cover 2 cm. When the bed is dry, press the soil moisture again. If the weather is dry and the soil moisture is poor, use small water for irrigation. If it rains after sowing, loosen the soil and water it in time to facilitate the emergence of seedlings. The amount of seeds used per mu is 2-3 kg. 4. Chemical weeding: 0-2 days after sowing, spraying herbicide 100g, using 40% dinotefuran100g or 40% herbicide ether 400-500g or 50% prometryne100-0/50g per mu, and adding water. 5. Field management: When the seedling height is about 5cm, that is, when the seedling grows 2-3 true leaves, the seedling spacing is 3-5cm. After the last plant spacing, the first topdressing combined with irrigation, urea 6- 10kg per mu. Seedling height is 7-8cm, and the second fertilizer is applied, with urea per mu 15-20kg. To keep the soil moist, water it every 4-5 days. In order to reduce the temperature, you can use grass curtains or sunshade nets to shade the sun. Spraying 15-30ppm gibberellin (920) and 1000- 1200ppm potassium dihydrogen phosphate on the leaves at the late growth stage, spraying 1-2 times, and stopping spraying 15 days before harvesting, and paying attention to the prevention and control of aphids and diseases. 6. Harvesting: The harvesting period of coriander in summer is not strict, and it can be harvested in batches in combination with thinning seedlings, which is more conducive to plant growth.