Abstract: The problems of some nutritions in soil were studied by microplots methods with labelled nitrogen during cultivatoin of unwaterlogged rice. This paper illustrates mainly following aspects: The general differences of some nutritions in soils between waterlogged and unwaterlogged cultivation of rice, the transformatoins of nitrogen, phosphorous and potash turned in rice, the efifciency of transformation of nutritins and the utilization of nitrogen. Results showed that it seems a lot of differences in utilized nitrogen sources between waterlogged and unwaterlogged rice. It is suggested that m0re manure should be applied ia waterlogged soil, whereas m0re fertilizer should be applied in unwaterlogged soil.

Key words: Unwaterlogged cultivation of rice, Nutritions of soil