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Various functions such as rain impact can effectively improve the crop growth environment in summer and autumn high temperature seasons and achieve stable growth. In addition, the sunshade net also has the functions of avoiding insects, preventing diseases, moisturizing and drought prevention. The color of the sunshade net is mainly black and silver gray, and the shading rate is mostly 45%-65%. At present, the production is mostly covered with black shade nets, and there are also silver gray shade nets, which use silver gray shade nets. Avoid and reduce the effects of the virus. The sunshade net is used for the nursery of cauliflower, broccoli, celery, early-ripe Chinese cabbage and other vegetables in August, which can significantly improve the seedling rate and seedling quality; the post-cultivation of the solanaceous vegetables can weaken the influence of glare and high temperature and prolong the flowering. In the result period, the yield is increased; the cultivation of autumn vegetables such as pakchoi, autumn tomato, autumn cucumber and early celery for the summer and autumn high temperature season can be planted early to increase the yield.
Micro sprinkler irrigation technology
Micro sprinkler irrigation technology is a new type of modern irrigation technology. The micro sprinkler sprays fine water droplets and distributes evenly. It has small range, small spray volume and small impact force. It is suitable for crops with high density and soft and tender plants. Vegetables such as Chinese cabbage and celery can also be used for vegetable seedlings. Micro sprinkler irrigation not only has the characteristics of water saving, labor saving, high efficiency, but also can improve the microclimate in the field, adjust the soil water, fertilizer, gas and heat conditions. It has the effect of humidifying and cooling in high temperature weather. It is the disaster prevention and protection in summer and autumn high temperature and dry season. One of the effective technical measures for vegetables is applied to vegetables such as Chinese cabbage, small green vegetables, edible fungus, and early celery, which can significantly improve yield, improve quality, and improve the rate of quality products.
Integrated pest control,
In the high temperature season, pests (such as Plutella xylostella, Pieris rapae, Spodoptera litura, etc.) occur severely and can be controlled by the following technical measures.
Insect net isolation technology: Insect net isolation can effectively prevent pests such as Plutella xylostella, Spodoptera litura, Pieris rapae, aphids, etc., and can use no or less insecticides. It is an effective technology for producing pollution-free vegetables. The production should be isolated and cultivated with 22 mesh silver-gray insect-proof nets. The main technical points of application are: a soil tumbling before covering the net, which can kill some underground pests; b. When covering the net, the surrounding of the insect-proof net should be compacted and prevented. The pests sneak into the spawning; c. Before the planting or transplanting, use Loessben to treat the soil and kill the pests and eggs that remain in the soil; d. During the isolation of the insect net, try to uncover the net as much as possible to prevent the insects from flying in and close. Pay attention to the timely removal of the egg mass produced on the mesh; e in the hot and cold weather, easy to cause high temperature in the shed, to use sunshade, irrigation and other cooling measures.
Sex pheromones, swatches, insecticidal lamps trap: can effectively control the development of pests, reduce the number of pests, and reduce the number of field pesticide control.
Chemical control: When taking out prevention and treatment, it is necessary to pay attention to safe medication. If pesticides are not used, biological pesticides, high-efficiency, low-toxicity and low-residue pesticides should be used, and the safety interval should be strictly enforced. The biological pesticides for controlling pests include avermectin, etc. High-efficiency, low-toxic and low-residue pesticides include imidacloprid and pyrethroid pesticides.
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