节水灌溉对水稻根系干物质量和含氮量的影响  

Effect of Water-saving Irrigation on Dry Matter and Nitrogen Content of Rice Root

作　　者：刘晗[1] 

机构地区：[1]菏泽学院园林工程系,山东菏泽274000

出　　处：《山东农业科学》2009年第3期19-21,共3页Shandong Agricultural Sciences

基　　金：本试验是国际合作课题的一部分;课题题目为More rice with less water;经费来源是澳大利亚;合作单位是国际水科学院;国际水稻研究所;武汉大学;华中农业大学

摘　　要：在大型蒸渗仪中,研究了不同水肥处理下不同生育期水稻根系对氮素吸收利用方面的变化规律。结果显示,节水灌溉水稻根系的含氮量在营养生长阶段高于淹灌,而生殖生长阶段则与淹灌处理差别不大。表明节水灌溉有利于水稻根系在营养生长阶段对氮素的吸收利用和生殖生长阶段向地上部的转移。The experiment was carried out in the lysimeter in order to study the effects of water- saving irrigation on rice root absorbing and utilizing nitrogen. The results showed that the nitrogen content in roots at the vegetative growth stage was higher under the condition of water - saving irrigation than that under the flooding irrigation, but there were few differences between the two irrigation methods at the stage. It indicated that water- saving irrigation benefits the reproductive growth absorption and utilization of nitrogen by rice at the vegetative growth stage and the transfer of nutrient to the productive organs at the reproductive growth stage.

关 键 词：节水灌溉 水稻 根干物质量 含氮量 

分 类 号：S511.071[农业科学—作物学]