The economic benefits of Chinese cabbage cultivation in summer are remarkable. The summer cabbage with a growth period of 50 days has a yield of 4000 kg per mu and an output value of 4,000 yuan or more. It is 3 to 4 times the income of conventional planting (Qiuqi) cabbage. The suitable temperature for the growth of Chinese cabbage is 25 °C in the early stage and 12 °C in the late stage (the temperature is high and then low). In the summer of the opposite climate, it is necessary to artificially change the microclimate in the field and reduce the temperature to create suitable environmental conditions.
First, the plot selection
The main root of Chinese cabbage is thick and strong, the roots are thick, the leaves are thick, the evaporation is large, and the soil nutrient requirements are high. The sun should be selected, it is convenient for irrigation and drainage, the organic matter content is high, the soil layer is deep and fertile, loose, and has good gas permeability. Sand loam is suitable. Apply 4,000 kg of high-quality decomposed organic fertilizer per mu, 50 kg of compound fertilizer as the base fertilizer, deep ploughing, fine hoeing, leveling and cultivating ridges, and the ridge height is 10-15 cm. Before entering the rosette period, Chinese cabbage is topped with compound fertilizer plus a small amount of urea, or sprayed with potassium dihydrogen phosphate to promote firming.
Second, the selection of good varieties
The early-maturing and heat-tolerant Chinese cabbage variety is based on the Japanese-born hybrid Hybrid Xiayang Zao 50 and Taiwan-made plum blossoms and Xiabao. It can resist 35 ° C ~ 37 ° C high temperature, growth period of 50 days or so, strong growth, plant type erect, flat top Stacked, suitable for dense planting, green outer leaves, white leaves, tight skin.
Third, strict sowing date
In summer, the Chinese cabbage sowing period is suitable from the end of May to the beginning of June. Sowing too early, low temperature for a long time, easy to twitch and flower; too late, low economic efficiency. If planting is carried out in wheat stubble, the ridge should be cultivated on the ground immediately after the wheat harvest, and the seedlings should be planted in advance and transplanted with soil.
Fourth, heat-resistant cultivation mode
Although the heat-resistant Chinese cabbage variety can resist high temperature of 35 °C ~ 37 °C, but the temperature in summer can often reach above 39 °C, it is necessary to take artificial measures to change the microclimate in the field and implement artificial cooling. The method is as follows:
1. High density cooling. According to the field test, 4000 plants per acre were planted at a temperature of 5 °C lower than the noon surface temperature of 1500 plants. The soft rot of Chinese cabbage in the thinly-planted cabbage field was basically unacceptable, and the incidence of soft rot in high-density cabbage field was only 1.5%.
2. Shading and cooling. (1) Intercropping with corn. The corn row spacing is 2 meters, and 4 rows of cabbage are planted in the middle. (2) Beans frame shade. The line spacing of beans is 2 meters, and 4 lines of cabbage are planted in the middle. (3) Cucumber is defeated and shaded. After the spring cucumber in the solar greenhouse was defeated, the summer cabbage was cultivated in the field.
Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
China Extract Powder For Use As Dietary Supplement Extract Powder, Extract Powder Manufacturer
Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.anabolicsteriod.com