由于水稻一般多栽培在冲积土壤上,因而欲使水稻高产,在肥料方面,氮素的施用方法最为重要。作者等为了弄清确立施肥理论的基本认识,在田间实验条件下,对水稻整个生育期,用~(15)N 标记的硫胺作基肥和追肥,观察了氮素在水田中的动向和不同生育期水稻对氮素的吸收经过,取得了一些结果。 Since rice is generally cultivated in alluvial soils, it is desirable to have high yields of rice. In terms of fertilizers, nitrogen application is most important. In order to clarify the basic understanding of establishing fertilization theory, under the field experiment conditions, the trends and differences of nitrogen in paddy field were observed using ~ (15) N thiamine as basal fertilizer and top dressing for the whole growth period of rice Growth and development of rice after nitrogen absorption, and achieved some results.