Sowing date of summer cabbage in Xinxiang

Sow in rows from mid-May to early July. Sowing methods are divided into strip sowing and hole sowing. The amount of seed used for drill sowing is about 0.25 kg, and that for hole sowing is about 0. 15 kg. In order to ensure that the seedlings are neat and vigorous, we should pay attention to the following points: ① After sowing, water should be poured along the furrow, but the water should not overflow the ridge surface, so as not to cause the soil surface to harden and affect the emergence. ② The bottom of the sowing ditch or hole should be flat, and the covering soil should be mainly loose and fine soil, not too thin or too thick. (3) Chinese cabbage sprouts are most afraid of exposure to the sun, and are usually sown in the evening or afternoon, so that the sprouts are unearthed two days later and exposed to the sun for one night. ④ Pay attention to insect prevention.

Technical points

First, avoid continuous cropping, carefully prepare soil and apply sufficient fertilizer.

In order to reduce diseases and the lack of element A in the soil, continuous cropping with cruciferous crops should be avoided, and combined with the short growth period of Chinese cabbage in summer, organic fertilizer should be reapplied. Summer cabbage grows vigorously, but it needs a lot of water and fertilizer, but it is not tolerant to waterlogging. In the production, we should adopt the cultivation method of applying base fertilizer again and planting in semi-high ridge, so that the ridge surface can be watered and drained after rain. 3000-5000 kg of decomposed high-quality organic fertilizer, 30-50 kg of calcium superphosphate and 0/0-20 kg of potassium chloride or potassium sulfate can be applied per mu.

Second, sow in time to ensure that the seedlings are complete, neat and lush.

Sow in rows from mid-May to early July. Sowing methods are divided into strip sowing and hole sowing. The amount of seed used for drill sowing is about 0.25 kg, and that for hole sowing is about 0. 15 kg. In order to ensure that the seedlings are neat and vigorous, we should pay attention to the following points: ① After sowing, water should be poured along the furrow, but the water should not overflow the ridge surface, so as not to cause the soil surface to harden and affect the emergence. ② The bottom of the sowing ditch or hole should be flat, and the covering soil should be mainly loose and fine soil, not too thin or too thick. (3) Chinese cabbage sprouts are most afraid of exposure to the sun, and are usually sown in the evening or afternoon, so that the sprouts are unearthed two days later and exposed to the sun for one night. ④ Pay attention to insect prevention.

Third, on-site management

Early thinning seedlings (sub-thinning seedlings), later seedling fixing and seedling strengthening. No matter drill sowing or hole sowing, it is generally necessary to interplant seedlings three times. The heart leaves occur for the first time (if it is not too crowded, it is unnecessary), the second time when the leaves are 2 ~ 3, and the third time when the leaves are 5 ~ 6. Because the growth period of summer cabbage is short, it is generally not squatting, and the fertilizer and water are pushed to the end. Water and loosen the soil in time. In case of drought and no rain, water should be poured every 2 ~ 3 days. When there is water in the field on rainy days, it should be drained in time to prevent the seedlings from getting sick. After sowing, topdressing urea 15 kg per mu, topdressing fertilizer for the second time at heading stage, and 25 kg of urea can be used per mu.

Fourth, early prevention and treatment of pests and diseases.

The diseases and pests of summer cabbage are serious, so it is necessary to find and prevent them early. The main diseases are downy mildew and soft rot. To prevent downy mildew, 75% chlorothalonil 500-fold solution, 65% zineb 500-fold solution and 40% ethyl phosphate wettable powder 150 ~ 200-fold solution can be sprayed at the stage of fruiting. In order to prevent soft rot, agricultural streptomycin should be sprayed 2 ~ 3 times at the stage of fruiting. Spraying 4000 times of 72% agricultural streptomycin sulfate soluble powder before or at the early stage of the disease should focus on mild plants and their surrounding plants, and pay attention to spraying petiole and stem base close to the ground. Pull out the diseased plants in time, reduce the source of germs and prevent the spread. Pests include aphids and cabbage worms. Spraying 4.5% beta-cypermethrin 1000 ~ 1500 times can control it. Strictly eliminate aphids and prevent viral diseases.

Fifth, timely harvest

Due to the high temperature and humidity in summer, Chinese cabbage can be harvested in July and August, and the specific harvesting time can also be determined according to the market situation, so as to harvest Chinese cabbage when the price is high, thus obtaining greater economic benefits.