玉米氮营养效率基因型差异研究  

Study on Difference of Nitrogen Nutrition Efficiency among Corn Genotypes

作　　者：周联东[1] 员海燕[1] 李得孝[1] 雷国才[1] 

机构地区：[1]西北农林科技大学,陕西杨凌712100

出　　处：《西北农业学报》2003年第1期21-24,共4页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：陕西省科技攻关资助项目(2001K01-G2-02;2002K02-G1-02)。

摘　　要：研究了陕西省近几年来推广的18个玉米杂交种的农艺性状和N营养效率状况,结果表明,在低N条件下,大部分农艺性状变异程度进一步拉大,农艺性状与产量的相关性变化各异。供试品种N营养效率差异显著,单株N积累量平均1.4954g,变动于1.0165～1.9314g,N利用效率变幅为50.57～71.02,N收获指数变幅为0.5305～0.6923,相关分析表明,吐丝期根系干重、根冠比、棒三叶N积累、籽粒N积累与总N积累量相关显著,收获指数与N收获指数、N利用效率有较高的相关性。Agronomic characters and nitrogen nutrition efficiency of eighteen corn hybrids populized in Shaanxi province for recent years were studied. The results showed that variation of major agronomic characters were enlarged under low N level, correlation between agronomic characters and grain yield varied from N levels. Difference of nitrogen nutrition efficiency among corn genotypes was significant. N accumulation per shoot averaged 1.4955 g, range from 1.0165 g to 1.9314 g. NUE range from 50.57~71.02. NHI range from 0.5305~0.6923. Correlation analysis showed that correlation between grain yield and dry matter of silk, rootshoot ratio, grain N accumulation were significant, highly correlation between HI and NHI,NUE.

关 键 词：N营养效率 N利用效率 N收获指数 

分 类 号：S513[农业科学—作物学] Q343.14[生物学—遗传学]