不同灌溉方式水稻植株对氮素的吸收利用研究

研究不同灌溉条件下水稻植株对氮素的吸收和利用。结果表明，在研究条件下，薄浅湿晒和间歇灌两种灌溉方式有利于水稻形成健壮的根系、增强吸氮能力，有利于氮素向生长中心转移，增加生长后期叶面积指数和叶片含氮量，提高水稻产量。

Study on the Absorptivity and Transference of Nitrogen of Rice Plant in Different Irrigation Treatments

A field-like experiment with two N levels-no N and 3. 5gN/plot, and three irrigation treatments was conducted with rice in Guilin in 1996. The irrigation treatments consisted of continuous flooding, thin-shallow-morst-drying and intermitting. The weight of roots, stems and leaves and their content of nitrogen,the index of leaf area and some other items were investigated under rice culture. The results have shown that the rice in water-saving irrigation treatment can form a stronger root system, enhance the absorptivity of nitrogen, increase the index of leaf area, transfer more nitrogen to the upper leaves and havest a higher grain yield than the rice in continuous flooding irrigation treatment.