Shed room soil phosphorus exceeds bid how to do

The accumulation of phosphorus is the main cause of vegetable yellow problem.Because excessive phosphorus nutrition will make the respiration of crops too exuberant, the consumption of organic nutrition is more, less accumulation, especially in bad weather such as continuous cloudy days, often because the plant does not have adequate nutrition reserves, resulting in lower resistance of the plant, increased disease, after sunny days the plant wilting or even dead trees, etc.In addition, excessive application of phosphate fertilizer will affect the activity of trace elements such as calcium, zinc, copper, molybdenum, etc., causing crop respiration difficulties and causing deficiency of element.At present, the problems of vegetable yellow leaves and umbilical rot in greenhouses, especially in the old greenhouses, are aggravated year by year due to the deficiency of nutrients. The important reason is that excessive phosphate fertilizer application leads to the absorption of trace elements blocked and soil nutrition imbalance.

In this regard, experts suggest the following measures to repair:

First, reduce the application of phosphorus fertilizer in base fertilizer.Generally speaking, after applying a large amount of manure in the greenhouse, phosphorus can completely meet the needs of plants, and there is no need to add diammonium phosphate, compound fertilizer and other fertilizers with high phosphorus content in the base fertilizer.The phosphorus in organic fertilizers is of low effectiveness. During the period of a large number of vegetable results, an appropriate amount of quick-effect phosphate fertilizer should also be applied in the top fertilizer. Generally, fertilizers with low content of nitrogen, potassium and trace elements can be selected, such as 20-10-30 or 13-6-40 and other low-phosphorus water-soluble fertilizers.

Secondly, pay attention to zinc and molybdenum and other trace elements.Excessive application of phosphate fertilizer will lead to the formation of insoluble zinc phosphate salt in the soil, which will cause obvious symptoms of zinc deficiency in crops.Excessive application of alkaline phosphate fertilizer, such as calcium, magnesium and phosphorus, will alkalize the soil, reduce the effectiveness of zinc and affect the absorption of zinc by crops.Moreover, excessive application of phosphate fertilizer often leads to the phenomenon of "strong phosphorus and weak molybdenum" between phosphorus and molybdenum, which makes crops unable to absorb and utilize phosphorus and molybdenum.So in production, for PengShi phosphorus levels in the soil, the next generation of vegetables reduce or without phosphate fertilizers, usually don't have to rush of phosphoric fertilizer, and just increase the amount of organic fertilizer and bio-bacterial manure, and pay attention to the use of the trace elements in the basal (late for soil phosphorus levels, trace element supplement for much more method), this will slowly ease the problem of soil.