The great development of greenhouse vegetable has played an important role in adjusting the structure of the agricultural industry, increasing the income of farmers, and enriching the "vegetable basket" of the Chinese people. However, due to long-term closed planting, coupled with improper farmer farming practices, improper irrigation and fertilization, and long-term non-rotating crops, large amounts of salt and water in the water and fertilizers accumulate in the soil, resulting in greenhouse vegetable production. The salinization of Tian, ​​which affects the yield and quality of vegetables, causes economic losses, lighter income reductions of 20 to 30%, and severe reductions of 50 to 80%, becoming a “headache†problem for many vegetable farmers. The following are our accumulated experience in preventing soil salinization and comprehensive management in long-term cultivation practices: Straw returned to the field is a treasure in the fall of the greenhouse before the change, the corn stalks such as smashing or crushing to the bottom of the plough layer, or in the ridge ditch 60 ~ 80cm deep buried. Years of straw return to the field have greatly improved soil structure, increased soil permeability, and reduced soil salinization. Organic fertilization is the most important in the "land of Chinese egg chickens" in Guantao County, Hebei Province. There are 15-18 million layer chickens per year. The annual output of chicken manure is over 500,000 tons, which provides sufficient organic fertilizer sources for greenhouse vegetables. The village of Guantao Township is located in Chezhan Village. It uses 6 to 10 square meters of decomposed chicken manure in the greenhouse, combined with the return of straw and a layer of straw and manure, which significantly increases the content of soil organic matter and enhances soil water storage and fertility conservation. The amount of chemical fertilizers and the number of waterings were reduced, and the degree of soil salinization was significantly lighter. Fertilizer is a key greenhouse soil salinization is mainly secondary salinization, due to vegetable production needs water, fertilizer needs a large amount, especially cucumber, tomato, eggplant, zucchini and other eggplant vegetables, often picking 1 ~ The water is poured once every 2 times, and often the water is used to make up the fertilizer. Due to poor water quality or over-application of nitrogen fertilizer, nitrogen excess occurs, and the soluble salts in the soil are too high, which increases the degree of salinization. The use of drip irrigation, micro-irrigation, sub-film irrigation and other techniques can be selected, and organic manure such as chicken manure can be added to reduce the amount of chemical fertilizers. When applying chemical fertilizers at the end, diammonium, urea, and nitric acid that have less effect on the concentration of soil solution are selected. Ammonium, superphosphate, etc., basically do not use strong ammonium chloride, potassium chloride and so on. Drip fertilization, foliar fertilization and root ditch fertilization were adopted to reduce the amount of water and fertilizer, increase the utilization of water and fertilizer, and reduce the accumulation of salt in the soil. The effect of comprehensive management is good. Soil salinization in vegetable fields in greenhouses is caused by many factors. In addition to increasing the amount of returning straw and organic fertilizer, biogas residue, biogas slurry, boron, molybdenum, manganese, and zinc micro-fertilizers can also be added. Rotational crops can be used for mutual enrichment of nutrients, and biological demineralization can be promoted. During the open season of summer vegetables, corn, beans and other crops are planted in close proximity. Absorb excessive amount of available nitrogen in the soil and press it at a suitable time. Through green body decomposition, breed a large number of microorganisms to consume the excess available nitrogen in the soil, thus reducing the soil. Concentration of salt ions; early removal of membranes in time to increase the precipitation of soil leaching; for soil compaction, a serious degree of salinization of the greenhouse, the surface soil can be mixed with sand or fine coal particles, the general thickness of 5 ~ 10cm , can also replace the quality of fertile pastoral soil, surface replacement soil depth 10 ~ 15cm. You can also take irrigation water to dissolve salt, so that the water layer to maintain more than 5cm, soak 3 to 5 days, then rule out a large number of dissolved salt water. Zhejiang Industrial Group Co., Ltd. , https://www.xingyeseafood.com