论文部分内容阅读
磷是植物生长所必需的营养元素之一。植物必须有足够的磷素营养供应才能完成其正常生长过程,磷在活植物体内参与光合作用、细胞分裂增大等过程,可改良品种的特性,使作物茁壮成长,为作物的优质高产打基础。磷还通过促进根系的发育,提高细胞液的粘度等活动,增强作物的抗旱、抗寒、抗病等抗逆性,为作物的优质高产做保证。美国一位农学专家研究指出:磷素的缺乏比其它元素的缺乏对世界作物生产的限制性要大,甚至大于病害、毒害对作物生产的限制。由于多数土壤含磷不足,加之磷易被土壤固定,形成根系不能解破和利用的化合物,使得保持磷在土壤中对作物的有效性很难,所以合理施用磷肥,提高磷肥的肥效,应掌握以
Phosphorus is one of the essential nutrients for plant growth. Plants must have adequate supply of phosphorus nutrients to complete their normal growth process. Phosphorus is involved in the photosynthesis and cell division in living plants to improve the characteristics of varieties, to make the crops thrive, and to lay a foundation for the high yield of crops . Phosphorus can also promote drought resistance, cold resistance and disease resistance of crops by promoting the development of root system, improving the viscosity of cell liquid, and ensuring high quality and high yield of crops. According to a study conducted by an agronomist in the United States, the lack of phosphorus is more restrictive of the world’s crop production than other deficiencies of other elements and even more than diseases and poisoning limit crop production. Because most of the soil is deficient in phosphorus and phosphorus is easily fixed by the soil, compounds that can not be broken and utilized by the roots can be formed, making it difficult to maintain the availability of phosphorus in the soil for crops. Therefore, To