What are the hazards associated with excessive application of phosphate fertilizer?
In recent years, farmers' friends have invested a lot of fertilizer in farmland in order to increase crop yields, and the use of phosphate fertilizer has also increased. What is the harm of excessive use of phosphate fertilizer? Recently, the author consulted relevant experts on this issue. Experts say: the proper application of phosphate fertilizer in phosphorus-deficient soil has a good effect on improving crop yield and quality, but there are many excessive application of phosphorus fertilizer. It is reported that the proper application of phosphate fertilizer in the soil with phosphorus deficiency has a good effect on improving the yield and quality of crops. Phosphorus plays an important role in the metabolism and energy metabolism of crop organisms. It participates in the life process of organisms; it is an important component of protoplasts, nuclear proteins and phytochemicals, and nuclear proteins are components of nucleus and protoplasm; Phosphorus can promote carbohydrate metabolism, decomposition and transportation, so it can improve the quality of tobacco leaves; phosphorus nutrition is closely related to nitrogen nutrition. It is related to the formation of amino acids and proteins; phosphorus can also promote cell division. Rational application of phosphate fertilizer can promote the rapid growth of roots of tobacco plants, increase the yield of flue-cured tobacco, and improve the quality of tobacco leaves. Appropriate amount of phosphorus nutrition promotes the development of underground roots and aboveground stems, leaves, flowers and fruits, and matures early, and can make seeds full; strengthen the resistance of dehydration of protoplasts and reduce transpiration intensity, which is beneficial to roots to absorb soil moisture and improve drought resistance of tobacco leaves. It can coordinate the ratio of nitrogen and carbon, appropriately inhibit the absorption of inorganic salts, and promote the conversion and transportation of organic substances. The photosynthesis products are more converted into carbohydrates, the total sugar content of tobacco leaves increases, the total nitrogen content, the total nicotine content and the protein content decrease, and the Schlick value develops in a favorable direction; the roasted leaves are dense, the color is yellow, oil Runfeng full, thus improving the quality of tobacco leaves. However, the more phosphate fertilizer is not applied, the better, because the phosphate fertilizer applied in the year cannot be completely absorbed by the crop and will accumulate in the soil. Excessive application of phosphate fertilizer is not only unhelpful, but also harmful. According to the soil fertility station in Yongding District, the content of available phosphorus in Yongding cultivated soil is rich, and the available phosphorus content is 2.9~453.16mg/kg, with an average of 38.6mg/kg, the difference is large. The number of samples containing phosphorus deficiency (25 mg/kg) accounted for 64.7%. The highest content in Chaosha Shatian was 54.06 mg/kg, followed by the gray mud field, which was 46.26 mg/kg, and the lowest in the muddy field, 29.56 mg/kg. The available phosphorus content is closely related to the soil type. The available phosphorus content of most soil types in the silt field, the tidal field and the infiltration type of the paddy type paddy soil is higher. 1. Excessive application of phosphorus fertilizer will cause the crop to absorb too much phosphorus nutrients from the soil. Excessive phosphorus nutrition will promote the respiration of crops too vigorously, and the dry matter consumed is greater than the accumulated dry matter, causing the reproductive organs to develop ahead of time, causing premature crop maturity, small grain and low yield. 2. Inducing zinc deficiency in the soil. Excessive application of calcium phosphate will cause zinc in the soil to interact with excess phosphorus, resulting in zinc phosphate precipitation, which can not be absorbed by the crop and has obvious symptoms of zinc deficiency. Excessive application of alkaline phosphorus fertilizer such as calcium magnesium phosphate fertilizer will alkalinize the soil, reduce the effectiveness of zinc and affect the absorption of zinc by crops. 3. Excessive phosphorus application will cause the crop to lose phosphorus. According to the study, excessive application of phosphate fertilizer will also cause the silicon in the soil to be fixed and not absorbed, causing the crop to be deficient in silicon, especially for the grass crops of Si. If you can't absorb more silicon from the soil, if you can't absorb more silicon from the soil, you will suffer from silicon deficiency, such as slender stems, lodging and poor disease resistance. 4. Excessive phosphorus application will result in phosphorus deficiency in the crop. Appropriate application of phosphate fertilizer will promote the absorption of molybdenum by crops. However, excessive application of phosphate fertilizer will cause the phosphorus and molybdenum to lose nutrient balance, affecting the absorption of molybdenum by crops, and exhibiting “molybdenum deficiencyâ€. 5. Cause the accumulation of harmful elements in the soil. Phosphate fertilizer is mainly derived from phosphate ore. Phosphate ore contains many impurities, including harmful elements such as cadmium, lead and fluorine. Moreover, the application of phosphate fertilizer will cause an increase in cadmium in the soil, and its annual growth rate is 0.15% and 0.08%, respectively. This cadmium has high effectiveness and is easily absorbed by crops, causing harm to humans and animals. 6. Excessive application of phosphate fertilizer will cause deterioration of soil physical and chemical properties. Superphosphate contains a large amount of free acid, which is applied continuously for a large amount of Hu, which causes acidification of the soil. Calcium magnesium phosphate contains 25% to 30% lime. Large amounts of application can exacerbate soil alkalinity and deteriorate physical and chemical properties. This article URL: What are the hazards of excessive application of phosphate fertilizer? YT-68 YT-68 Shenzhen Sunshine Technology Co.,Ltd , https://www.shenzhenyatwin.com