Chives can be produced in four seasons, but the production is mainly in the spring and autumn. In the hot summer season, the focus of production is to make the transplanted chives seedlings safer over the summer in order to transplant seedlings in mid-August. During this time, we must strengthen management in the following five areas:
First, soil preparation before planting the best pods and melons, the soil must be deep-turning rake drying, to do irrigation and drainage convenience, rain live dry. 1 mu of pre-transplanted farmyard manure 300kg and ternary compound fertilizer 50kg as base fertilizer before transplanting.
Second, the appropriate shallow planting spring and autumn planting scallions general planting depth of 4-5cm, its purpose is to increase light blue length, increase production and product quality. However, during summers, heavy rains are often encountered, and the soil is easily hardened. If the planting is too deep, the bottom roots will have poor permeability, resulting in poor growth and even light blue rot. Therefore, when planting seedlings, 3-4 roots should be planted in each cluster, and the depth should be 2-3cm, and the density should be kept at 5cmx5cm.
3. The optimum temperature for the growth and delivery of sheltering chives is around 25 degrees, and the exposed temperature in summer is often as high as 40 degrees or above, which seriously affects the normal growth of chives. For this purpose, shade nets must be used. This can be a cooling down 3-5 degrees; Second, less evaporation, to maintain soil moisture; Third, prevent heavy rain and rain on the direct flushing of the surface, thus effectively reducing the degree of surface consolidation.
Fourth, the small water ground scallion root system is not well-developed, shallow distribution, water absorption capacity is weak, neither drought nor impatient. Therefore, we must adhere to a small water supply during drought, and it is generally required to be carried out before 8 o'clock in the morning. Therefore, when the temperature of water and soil is constant, if the water temperature is high at noon, the temperature difference between water and soil is too large, and the chives are not suitable for physiological conditions. Disease.
V. Diseases and Insect Control Diseases of chives include gray mold and virus diseases. The commonly used agents are: 60% saponin aluminum phosphorus wettable powder 500 times liquid, 64% antivirus WP wetted powder 600 times. The main insect pests are: green onion, onion thrips, the former can be used 20% Chlorampen EC 200.
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