Advancements in nitrogen efficient screening of germplasm resources and deficiency tolerance mechanisma study in rice

Chinas paddy soil lacks in nitrogen generally, while nitrogen plays an important role on the growth of rice, and nitrogen fertilizer inputs make a great contribution on increasing the yield of rice. In recent years, with the increase of nitrogen fertilizer inputs, the utilization rate of nitrogen fertilizer in rice was reducing continuously and also showed some a certain adverse effects on the ecological environment, and the ideal way to solve the problem was to screen efficient nitrogen germplasm resources. This artical was summarized based on the research of nitrogen efficient screening of germplasm reasources and deficiency tolerance mechanisma in rice and made prospection of it, in order to provide the basis for the screening of nitrogen efficient varieties and the improvement in rice.