<FONT face="Verdana">Effects of   Located Nitrogen Application and Nitrogen Application After Exhaustion on Rice Yield and Nitrogen Use Efficiency in the Taihu Lake Region, China</FONT>

LIN Zhong-cheng，#,YE Shi-chao,#, DAI Qi-gen,CHEN Jing-dou,GU Hai-yan,ZHAO Hong-xiang,ZHAO Xiao-hua, ZHANG Hong-cheng,HUO Zhong-yang,XU Ke, WEI Hai-yan

doi:10.3969/j.issn.1001-7216.2010.03.010

2010 , Vol. 24 >Issue 3: 271 - 277

DOI: https://doi.org/10.3969/j.issn.1001-7216.2010.03.010

研究报告

Effects of Located Nitrogen Application and Nitrogen Application After Exhaustion on Rice Yield and Nitrogen Use Efficiency in the Taihu Lake Region, China

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¹Key Laboratory of Crop Genetics and Physiology of Jiangsu Province/Innovation Center of Rice Cultivation Technology in the Yangtze Valley, Ministry of Agriculture, Yangzhou University, Yangzhou 225009, China; ²Farming and Forestry Bureau of Wujiang County, Wujiang 215200, China; ^#These authors contributed equally to this paper; ^*Corresponding author, E-mail: qgdai@yzu.edu.cn

Received date: 1900-01-01

Revised date: 1900-01-01

Online published: 2010-05-10

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Abstract

通过在太湖地区持续施氮和土壤氮耗竭1年后再施氮的对比试验，研究了施氮量对水稻产量、干物质积累、植株吸氮量、氮肥利用效率和土壤氮素的影响。经过3季（稻麦稻）不施氮处理，第3季作物水稻的产量显著下降，仅6673.42 kg/hm2；持续施氮和氮耗竭1年后施氮处理的产量均随着施氮量的增加而提高，但增产幅度逐渐减小，当施氮量为300 kg/hm2时，水稻产量最高，分别为10 514.95 kg/hm2和10 472.36 kg/hm2，施氮量继续增加时水稻都出现倒伏而减产；各施氮处理植株的干物质积累、总吸氮量和土壤全氮含量都随施氮量的增加而提高，而氮肥利用效率都随施氮量的增加而降低；氮耗竭1年后施氮处理与持续施氮处理之间的各项指标变化不明显，说明这些指标与氮耗竭1年后的土壤背景氮关系不密切，而与当季施氮量有关。

Key words： 氮素; 施肥; 水稻; 产量; 氮肥利用率; 土壤

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LIN Zhong-cheng，#,YE Shi-chao,#, DAI Qi-gen,CHEN Jing-dou,GU Hai-yan,ZHAO Hong-xiang,ZHAO Xiao-hua, ZHANG Hong-cheng,HUO Zhong-yang,XU Ke, WEI Hai-yan . Effects of Located Nitrogen Application and Nitrogen Application After Exhaustion on Rice Yield and Nitrogen Use Efficiency in the Taihu Lake Region, China[J]. Chinese Journal OF Rice Science, 2010 , 24(3) : 271 -277 . DOI: 10.3969/j.issn.1001-7216.2010.03.010

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