The partitioning of N from various sources within different parts of rice plant was studied. The result indicates the different N-supply characteristics of soils and fertilizers and the redistribution of soil-and fertilizer-N, which went into the plant "pool" in different times with different speed and intensity. The evaluation of fertilizing techniques are of practical meaning when the ratio of grain N% dff (or dfs) values to straw dff}dfs values which show the magnitude of contribution from different N sources to the rice grain, and the fertilizer N balance in the agricultural ecology were concerned. Fertilization increases both soil-N up-take and crop yield by changing the soil N supply characteristics. However, the "priming effect" may augment the soil N loss through volatilization.
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吴毅文,蔡大同,史瑞和.兔粪尿-硫酸铵和土壤氮在水稻植株体上的分布[J].土壤学报,1991,28(2):161-167. Wu Yiwen, Cai Datong, Shi Ruihe. PARTITIONING OF N FROM RABBIT’S EXCRETA AND AMMONIUM SULFATE AND SOIL-N WITHIN RICE CROP[J]. Acta Pedologica Sinica,1991,28(2):161-167.