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当前位置: 首页 > 文章 > 不同小麦品种氮效率与氮吸收对氮素供应的响应及生理机制 应用生态学报 2007,18 (4) 807-812
Position: Home > Articles > Responses and corresponding physiological mechanisms of different wheat varieties in their nitrogen efficiency and nitrogen uptake to nitrogen supply Chinese Journal of Applied Ecology 2007,18 (4) 807-812

不同小麦品种氮效率与氮吸收对氮素供应的响应及生理机制

作  者：
韩胜芳;李淑文;吴立强;文宏达;肖凯
单  位：
河北农业大学生命科学学院;河北农业大学农学院;河北农业大学资源与环境科学学院
关键词：
小麦;氮利用效率;氮代谢;生理指标
摘  要：
以具有典型特征的不同氮效率小麦品种为材料,研究了低氮和高氮条件下小麦的生物学性状、生理参数和氮同化代谢酶活性.结果表明:低氮条件下,不同氮效率小麦品种根系干质量、茎叶干质量、植株氮累积量基本上为氮高效品种>中效品种>低效品种.低氮条件下,氮吸收高效品种(冀97-6360)的根系活跃吸附面积、TTC还原力、叶片硝酸还原酶活性和叶片NO3-含量最大;生理高效品种(石新5418)具有较高的叶片亚硝酸还原酶活性和谷氨酰胺合成酶活性,较低的植株全氮含量、叶片NO3-含量和硝酸还原酶活性.低氮条件下植株氮利用效率与氮吸收系数显著相关.不同小麦品种在高氮条件下的生物学性状、生理参数和氮同化代谢酶活性与低氮条件下不尽一致.
译  名：
Responses and corresponding physiological mechanisms of different wheat varieties in their nitrogen efficiency and nitrogen uptake to nitrogen supply
作  者：
HAN Sheng-fang1,2, LI Shu-wen3, WU Li-qiang2, WEN Hong-da3, XIAO Kai1 (1College of Agronomy, Hebei Agricultural University, Baoding 071001, Hebei, China; 2College of Life Science, Hebei Agricultural University, Baoding 071001, Hebei, China; 3College of Resources and Environment, Hebei Agricultural University, Baoding 071001, Hebei, China).
关键词：
wheat (Triticum aestivum L.); nitrogen use efficiency; nitrogen metabolism; physiological parameters
摘  要：
In this paper, the biological traits, physiological parameters, and enzyme activities related to N assimilation and metabolism of wheat varieties with different nitrogen (N) efficiency were studied under low and high N supply. The results showed that under low N supply, the dry mass of root, leaf, and stem as well as the accumulated N amount in plant were in the order of high N efficiency variety>mid N efficiency variety>low N efficiency variety. The variety with high N uptake efficiency (Ji 97-6360) under low N supply had the highest root active absorption area and TTC-reductive activity and the highest leaf nitrate reductase activity and NO3-content, while the variety with high N physiological efficiency (Shixin 5418) had higher nitrite reductase and glutamine synthetase activities but lower NO3-content and NR activity in its leaf. There was a significant positive correlation between nitrogen use efficiency (NUE) and nitrogen uptake index (NUI) under low N supply. The biological traits, physiological parameters, and enzyme activities related to nitrogen assimilation and metabolism of test wheat varieties were not always the same under high and low N supply.

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