How to grow coriander at 35 degrees in summer

Varieties with heat resistance, late bolting and fast growth should be selected in summer. Choose fertile soil, good water and fertilizer conservation performance, drought can be irrigated, waterlogging can discharge, good permeability, more than five years have not planted coriander soil, must not be repeated. In summer, the main way to grow coriander is to sow, fill with enough water, and sow evenly after the water seeps. The soil should be kept moist and watered every 4-5 days. Shade and cooling measures should be taken when the temperature exceeds 30 ℃.

1. Choose the right species. Varieties with heat resistance, late bolting and fast growth should be selected in summer.

2. Straighten up the ground. Select the soil with fertile soil, good performance of water and fertilizer conservation, drought can be irrigated, waterlogging can discharge, and good permeability. The soil that has not been planted with coriander for more than five years should not be replanted. 4000kg and cake fertilizer 100kg should be applied per mu. The residue of the previous crop should be removed to reduce the occurrence of diseases and insect pests. Deep ploughing fine Harrow, make a bed, the width of the bed is 1-1.5 meters, and the length is 8-10 meters.

3. Accelerate the sprouting. The sowing time of coriander is not strict, and it can be harvested 40-50 days after sowing. Soak the seeds to promote budding before sowing. Soak the seeds in clear water for 24 hours, then spread them on a moist sack with a thickness of 2 cm and cover with a moist sack with a temperature of 20 ℃ ~ 25 ℃. Stir once or twice a day to keep a certain amount of moisture, and then sprout and sow after 3 to 4 days.

4. Promote good seedlings. Sowing parsley is the main way to grow coriander in summer, first sow two rows and leave one, take the covering soil of the first sowing border and put it on both sides of the border, then pour enough water, sow evenly after the water seeps, and cover the soil 2 cm after sowing. Then sow the empty bed left behind in the same way as the first sowing bed. The amount of seed used per mu is about 2 kg.

After all the broadcast, there will be a suppression to conserve soil moisture. If the weather is dry and the soil moisture is small, which affects seedling emergence, it can be irrigated with a small amount of water. Thinning and weeding were carried out when the seedling height was 4cm, and the seedling distance was 2cm. After the seedlings were irrigated, the thin manure water was applied once per mu, and when the seedling height was 7cm, the first fertilizer was applied. At this time, the amount of fertilizer should be large, and ammonium sulfate per mu should be applied 20~30kg.

5. Control the temperature. The soil should be kept moist and watered every 4-5 days. Shade and cooling measures should be taken when the temperature exceeds 30 ℃. Harvest can be combined with thinning seedlings and harvested in batches, which is beneficial to plant growth.