How can potassium dihydrogen phosphate be used in rice

1. Effects of spraying potassium dihydrogen phosphate in middle and late growth of rice:

Potassium dihydrogen phosphate is a compound fertilizer with high concentration of available phosphorus and potassium. When sprayed in the middle and late stage of rice growth, it can not only prolong the leaves to maintain high chlorophyll content, enhance their photosynthetic capacity, and increase the heading rate. It can also promote grain filling at mature stage, increase seed setting rate and 1000-grain weight, improve stress resistance and cold resistance of rice, and create conditions for stable and high yield of rice.

2. Optimal time and dosage of potassium dihydrogen phosphate sprayed on rice:

Rice at tiller stage, booting stage and full heading stage were sensitive to P and K, and potassium dihydrogen phosphate could be sprayed on all of them. It was best to spray twice or three times with an interval of 10 days before and after full heading stage. General per mu with 150~200 grams of potassium dihydrogen phosphate water 50 kg spray (that is, each pot of water with potassium dihydrogen phosphate 50-60 grams). Spraying time is in the afternoon when there is no dew on the leaf surface, spray nozzle spray evenly, avoid excessive concentration of burning leaves. At THE SAME TIME, WHEN APPLYING potassium diHYDROGEN phosphate, appropriate amount of UREA (spraying concentration of about 1%) can be selectively added according to the seedling condition to make up for the shortage of nitrogen fertilizer, and the effect is better.

3, rice spraying potassium dihydrogen phosphate should pay attention to matters :@ must avoid excessive concentration, and spray the remaining liquid repeatedly, resulting in leaf burning. (2) When spraying potassium dihydrogen phosphate, avoid mixing other pesticides at will, resulting in reduced pesticide control effect. ③ After spraying the following heavy rain, should be sprayed again.

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