摘要： 选择近年来在河南推广的8个小麦品种,在低氮和高氮2个水平下研究了不同小麦品种氮效率的差异.结果表明:随着施氮量的增加各品种的产量都有所提高,提高的幅度与品种对氮的敏感性有关.在2个氮水平下,8个小麦品种氮效率存在着很大的差异,其中,郑麦004号、太空6号、郑麦9023、周麦16号和豫麦0号在2个氮水平下的氮效率都较高.通径分析结果表明,在低氮水平下,氮效率主要由氮吸收效率决定,在高氮水平下则由氮吸收效率和氮利用效率共同决定.

关键词: 小麦, 品种, 氮吸收效率, 氮利用效率, 氮效率

Abstract: A pot experiment with eight wheat varieties from Henan province was conducted to investigate the genotype differences in N efficiency at two rates of N supply. The results showed that the grain yields of all varieties increased significantly with the increase of nitrogen application.The increasing rates were related to the variety sensitivity to N.The difference of N efficiency was obvious among the 8 wheat varieties.The N efficience of Zhengmai 004,Taikong 6,Zhengmai 9023,Zhoumai 16 and Yumai 50 were very high at low N and high N.Path analysis indicated that N efficiency was determined mainly by N uptake efficiency at low N condition,but by both N uptake efficiency and N utilization efficiency at high N condition.

Key words: Wheat, Varieties, Nitrogen uptake efficiency, Nitrogen utilization efficiency, Nitrogen efficiency

中图分类号: 

• S143.1