Promote scientific fertilization
We should vigorously promote the techniques of fertilizer application and soil testing and fertilizer application in greenhouses. Using scientific fertilization methods, adhere to the combination of basal fertilizer and top dressing. Basal manure should be dominated by organic fertilizer, combined with the application of phosphorus and potassium fertilizers; top dressing should be top-dressed according to the different growth stages of vegetables and fertilizer requirements, focusing on the prosperous period of product organ formation such as rhizome, tuber enlargement period, knot ball During the period of flowering, the topdressing is applied again. Basal fertilizers should be applied deeply, applied in layers or in furrows. Top dressing should be done with watering. Promote foliar fertilization technology.
Scientific use of chemical fertilizers
Strictly control the amount of chemical fertilizers in particular to reduce the amount of nitrogen fertilizer, eliminate blind fertilization, partial nitrogen fertilizer. The use of fertilizers must consider not only the nutrient content, but also the use of impurities, especially heavy metals and fertilizers with low levels of toxic substances and high purity. Pay attention to the use of trace element fertilizers, popularize nitrogen, phosphorus and potassium compound fertilizers and organic and inorganic compound fertilizers.
Apply organic fertilizer
To vigorously advocate the use of organic fertilizers, it is necessary to use sufficient quality of livestock manure and other manures that have been fully decomposed and treated by accumulation and fermentation.
Pay attention to training and improving soil fertility
Take comprehensive measures, such as the scientific rotation of crops, dry crops, melons and vegetables; increase the use of organic fertilizers; establish standardized greenhouse vegetables, strengthen irrigation and water conservancy construction, and lower the water table.
Reducing the pollution of greenhouse vegetables with toxic substances
It is strictly prohibited to use garbage and sewage irrigation. In fields with high cadmium content, it can be used in rotation with rice to apply lime or calcium, magnesium and potassium fertilizers. Silicon and calcium fertilizers can increase soil pH.
Zhoushan Fudan Tourism CO., LTD , https://www.fudanfood.com