MySheen

Excessive application of phosphate fertilizer does many harm

Published: 2024-11-08 Author: mysheen
Last Updated: 2024/11/08, 1. Due to soil application. There is a close relationship between soil conditions and the efficiency of phosphate fertilizer. In the soil with low content of organic matter and available phosphorus, the application of phosphate fertilizer to most crops can increase the yield. Therefore, phosphate fertilizer should be mainly distributed in the soil with low organic matter content and phosphorus deficiency in order to give full play to the fertilizer effect. Such as red soil dry field, yellow mud field,.

Proper application of phosphate fertilizer in phosphorus-deficient soil can effectively improve crop yield and quality, but excessive application will do more harm than good. The main hazards are as follows: 1. Excessive plant respiration and excessive consumption of phosphorus nutrition will greatly enhance crop respiration, resulting in excessive consumption of sugar and energy stored in crops. 2. Excessive application of calcium phosphate to induce zinc deficiency in soil will alkalize the soil, reduce the availability of zinc, and affect the absorption of zinc by crops. Albinism of corn and stiff seedlings of rice are the result of zinc deficiency in crops. At the same time, too much phosphorus application will lead to crop stunting. 3. The deficiency of silicon and molybdenum and silicon in plants plays a very positive role in the growth and high yield of many crops. For example, if silicon-loving rice can not absorb enough silicon from the soil, there will be symptoms of silicon deficiency, such as slender stems, lodging and poor disease resistance, and rice silicon deficiency is sometimes caused by a large amount of phosphorus application. When excessive phosphate fertilizer is applied, the phenomenon of "strong phosphorus and weak molybdenum" often occurs between phosphorus and molybdenum, which makes it impossible for crops to absorb and utilize phosphorus and molybdenum. 4. The accumulation of harmful elements phosphate fertilizer in soil mainly comes from phosphate rock, which contains many impurities, including cadmium, lead, fluorine and other harmful elements. Therefore, excessive application of phosphate fertilizer will lead to the increase of cadmium in soil, and this kind of cadmium has high availability and is easy to be absorbed by crops, thus causing harm to human beings and animals. Generally speaking, even if it is phosphorus-deficient soil, the application rate should not exceed 40 kg per mu, and the appropriate amount should be 30-35 kg. The aftereffect period of phosphate fertilizer is long, and the base fertilizer can be applied once every 2 ~ 3 years.

 
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