Core Tip: Chinese cabbage is very cool and cool. Summer planting is in high temperature weather throughout the growing season, often due to the sun, drought, heavy rain, etc., resulting in reduced production or even out of production. In recent years, the development of shade net covering planting technology has made it possible to guarantee the Chinese cabbage's resistance to disasters in summer. The cool weather conditions of Chinese cabbage are very hot and the whole growing season in summer is in high temperature weather, often due to the sun, drought, heavy rain, etc., resulting in reduced production or even out of production. In recent years, the development of shade net covering planting technology has made it possible to guarantee the Chinese cabbage's resistance to disasters in summer. 1. Shade net floating surface coverage After spreading seeds, covering soil and watering the fields, the fields were tiled with black shade nets. Immediately after emergence, the shade nets were removed. The repelled shade net was covered in another newly planted plot and recycled. The advantage is that the seedlings are neat and tidy, labor-saving and labor-saving, and they can prevent the seedlings from being attacked by heavy rain before they emerge. 2, shading net small shed or short flat planting In other words, in addition to the floating surface covering from the seedling to the seedling stage, after the emergence, a 0.8-1m high dwarf flat or small arch shed is also placed on the gill, and the shed continues to cover the shade net so that the seedlings can be kept at a low temperature. Temperatures, unrestrained by thunderstorms, and damage from summer light continue to grow, yields and quality are more stable. Until 3-5 days before harvesting, the shade net must be removed to make the leaf color closer to the natural state and improve the product quality. 3, shade nets greenhouses cover planting Can use the scaffolding of the summer greenhouse, use the longitudinal pull rods on both sides of the shed, pull on the lamination line, and then lay the shade net on the laminated film line. The kind of Chinese cabbage can also use the shed to cover the shade net, and can also Shed buckle - layer of film, the film covered with nets, this kind of "membrane-a" rainproof awnings method of planting cabbage, better effect of disaster recovery. Note that in addition to planting shade nets to cover planting, we must also select heat-resistant, disease-resistant varieties, such as hot-you, dwarf, Shanghai cabbage, and Hangzhou cabbage. In addition, according to the specific conditions of unfavorable climatic conditions in summer, the live broadcast method will be adopted in stages to expand the seeding rate. Generally, the seeding amount will be 1.5-2kg per 667m2, and the seedling spacing will be 4-6cm. Dense seeding can shorten the harvesting period. At the same time, we must choose ventilation and cool, good water retention loam (night tide soil or black sand), close to the water source, irrigation and drainage convenience, and master the principle of pouring water, pouring ground, if sprinkler irrigation is better. After harvesting 18-25 days after sowing, it can produce 1000-1500kg per 667m2. Anesthesia and Breath Disposables Central Venous Catheter,Hemodialysis Catheter,Blood Pressure Transducer,Phripheral Inerted Central Catheter,Artery Compression Device Sampler,Infusion Pump Anesthesia Medical Co., Ltd. , https://www.jssinoanesthesia.com