Soybean is an important grain and oil crop in the world,and it is also the main source of high quality protein and animal feed protein.Soybean is one of the P-loving crops.Phosphorus is not only an important component of soybean genetic material,but also participates in physiological and biochemical processes such as enzymatic metabolism,metabolism,nodule nitrogen fixation and so on.Nearly one-half of the world's arable land is in the state of phosphorus deficiency,and about twothirds of the cultivated land...