杂交水稻根系N素营养效率及其生理因素研究  

Studies on Efficiency of N Nutrition and Physiological Factors in Roots of Hybrid Rice

作　　者：石庆华[1] 李木英[1] 涂起红[1] 

机构地区：[1]江西农业大学农学院,江西南昌330045

出　　处：《杂交水稻》2002年第4期45-48,共4页Hybrid Rice

基　　金：国家自然科学基金项目 (3976 0 0 4 1)

摘　　要：选用 7个杂交水稻组合及其亲本 ,研究其根系N素营养效率及其生理机制。结果表明 ,杂交水稻在不同N素水平下 ,N素吸收效率均高于亲本 ;其优势表现在根系吸收能力强 ,单株根量大于亲本 ,根系的ATPase活性和根系氧化力均较亲本高 ;The efficiency of N nutrition and the physiological mechanism in roots were studied in 7 hybrid rice combinations and their parents. The results showed that the efficiency of N uptake in roots of hybrid rice was higher than that of their parents under different levels of N nutrition. The superiority of hybrid rice over their parents was in a stronger ability of roots in absorbing N nutrition, a greater number and a heavier weight of roots and a higher activity of the ATPase and oxidation ability of roots. However, hybrid rice was not superior to their parents in the utilization efficiency of N nutrition.

关 键 词：杂交水稻 根系 氮素营养效率 生理机制 氮肥 

分 类 号：S511[农业科学—作物学]