Summer cabbage can be sowed in batches in stages, and it can be marketed in about 20 days. The yield per mu can reach 1400 kg. However, due to the sowing date in June-August, during the hot period, high temperatures, storms, and insect pests are often important factors affecting its yield. Therefore, some cultivation measures are needed to obtain stable production and high yield.
Variety selection should use heat-resistant, weather-resistant, fast-growing varieties, generally selected Shanghai Xiaocai, high stalk white, white peony, Nanjing arrow culm and other varieties.
Soil preparation and sowing of vegetable fields should be based on ponds, rivers, and cool, ventilated areas. The soil is of a granular structure and has strong water retention and fertility. Apply 1500-2000 kg of fully-fertilized organic fertilizer and 60-70 kg of cake fertilizer per mu. In the process of soil preparation, the “five-improvement†measures (shallow cultivating, deep-cultivating, widening, narrowing, long-changing, short-grained, flat-turning, arc-changing, shallow-groove, and deep trenches) were implemented to improve the flood resistance of vegetable fields. The ability to wait for natural disasters. 1.5 ~ 2 kg per acre sowing, in order to make the seed evenly, the seeds can be mixed into the sand, two times sowing.
Cover the shade net with bamboo, bamboo poles or other materials scaffolding scaffolding, height of 1.5 meters is appropriate, scaffolding with wire buckle sunshade net. Before the emergence of uncovered nets; after the emergence of sunny afternoon 5 to 6 points to open the net, 8 to 9 points to cover the net, not covered by rainy days, but stormy weather should be firmly in order to reduce the storm damage to the seedlings.
Reasonably watering and watering depends on “seeing the sky, seeing the land, and looking at the foodâ€. Sunny days, watering 1 or 2 times a day to keep the soil moist. According to "three cool" (day cool, cool, cool water) to determine the watering time, generally selected in the early morning and early evening. The sooner in the morning, the better. In the evening, it should be poured after 7-8. Watering method: pouring water before emergence; after emergence, rest assured that the splash of water before the leaves should be followed by a splash, can not make up the filling (filling with mud water splashed on the leaves); rest assured that after the leaves to water or water, a After pouring the scoop, you can't bring back a drop. When you bring back the water, there will be mud on the leaf.
Scientific insect pests have a heavy pest in summer cabbage. The main pests are aphids, cabbage caterpillars, and yellow-flesh beetles. We must adhere to the principle of early cure and small treatment, and we must use high-efficiency, low-toxic, low-residue pesticides, or applied biological and cultivation techniques for prevention and control. Cultivation should be avoided as far as possible with the cruciferous crops or adjacent work, and timely clean the garden, reduce the source of insects. The aphids can adopt silver-gray film to avoid embarrassment, that is, 15 cm wide silver-gray films are laid around the vegetable fields; cabbage caterpillars can be controlled by Bacillus thuringiensis bt emulsion, acaricidal bacillus and other biological agents; yellow stripe can be used 90% crystal enemy 1000 times spray control of insects.