| 不同施氮量对水稻氮素吸收与分配的影响 |
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| 引用本文： | 晏娟,尹斌,张绍林,沈其荣,朱兆良. 不同施氮量对水稻氮素吸收与分配的影响[J]. 植物营养与肥料学报, 2008, 14(5): 835-839. DOI: 10.11674/zwyf.2008.0503 |
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| 作者姓名： | 晏娟 尹斌 张绍林 沈其荣 朱兆良 |
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| 作者单位： | 1.南京农业大学资源与环境科学学院,江苏南京210095,2 中国科学院南京土壤研究所土壤与农业可持续发展实验室,江苏南京210008 |
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| 摘 要： | 运用15N示踪法研究了不同施氮量对两个品种水稻（4007和武运粳15）干物质积累量与其对15N吸收及分配的影响。结果表明，当施氮量超过N 150 kg/hm2时, 两个品种水稻子粒产量均不再显著增加。4007在4个施氮量下(N 100，150，200和 250 kg/hm2)分别比无氮区增产22.3%，36.9%，43.2%和38.1%；武运粳15分别增产10.6%，18.8%，27.1%和21.5%。同一施氮量下，4007子粒中15N累积量显著高于武运粳15，但茎叶和根中没有差异。增加施氮量降低了15N在水稻子粒中的分配比例，但提高了茎叶中15N的分配比例。15N在根中的分配比例不受施氮量和品种的影响。研究结果还表明，同一施氮量下，4007对肥料氮的总体利用率要比武运粳15高3～6个百分点。
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| 关 键 词： | 水稻 15N 示踪技术 施氮量 吸收分配 |
| 收稿时间： | 2007-10-23 |
Effect of nitrogen application rate on nitrogen uptake and distribution in rice |
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| YAN Juan,YIN Bin,ZHANG Shao-lin,SHEN Qi-rong,ZHU Zhao-liang. Effect of nitrogen application rate on nitrogen uptake and distribution in rice[J]. Plant Nutrition and Fertilizer Science, 2008, 14(5): 835-839. DOI: 10.11674/zwyf.2008.0503 |
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| Authors: | YAN Juan YIN Bin ZHANG Shao-lin SHEN Qi-rong ZHU Zhao-liang |
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| Affiliation: | 1.College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China;
2 State Key Laboratory of Soil and Sustainable Agricultural,Institute of Soil Science,CAS,Nanjing210008,China; |
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| Abstract: | A micro-plot experiment using 15N labeled fertilizer was conducted to compare the effects of different nitrogen application rates on dry matter production, 15N uptake and distribution in two different rice cultivars, 4007 and Wuyunjing15 (WYJ15). The results obtained are listed as follows. There were no significant increments in yield of both rice cultivars if the nitrogen application rates were over N 150 kg/hm2, and the percentages of rice grain yield increase over control were 22.3%, 36.9%,43.2% and 38.1% for 4007 at N application rates of N 100, 150, 200 and 250 kg/hm2, respectively; while they were only 10.6%, 18.8%, 27.1% and 21.5% for Wuyunjing15. The 15N accumulation in grains of 4007 was much higher than in Wuyunjing15，but there were no significant differences in straws and roots between the two cultivars under the same nitrogen application rate. The 15N distribution in grains increased significantly with nitrogen application rates, but there was a reverse trend in straws, and no difference in roots of these two cultivars among N application rates. The study also showed that, at the same N application level, the total nitrogen utilization coefficient in 4007 was 3%–6% higher than in Wuyunjing15. |
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| Keywords: | rice 15N labeled technique nitrogen application rate uptake and distribution |
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