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实时实地氮素管理对水稻产量和氮素吸收利用的影响
引用本文:易琼,赵士诚,张秀芝,杨利,熊桂云,何萍.实时实地氮素管理对水稻产量和氮素吸收利用的影响[J].植物营养与肥料学报,2012,18(4):777-785.
作者姓名:易琼  赵士诚  张秀芝  杨利  熊桂云  何萍
作者单位:1.农业部植物营养与肥料重点实验室,中国农业科学院农业资源与农业区划研究所,北京 100081;
基金项目:国家重点基础研究发展计划课题
摘    要:以扬两优6号和培两优3076水稻为材料,通过田间试验比较研究了基于SPAD值的氮素管理对水稻氮素吸收、产量和氮肥利用率的影响。结果表明,随着SPAD预设阈值的增加,氮肥用量增加,籽粒产量和氮素吸收也随之增加。实时氮素管理条件下,水稻扬两优6号和培两优3076均以SPAD值为41处理获得较高的籽粒产量和氮素利用率,该处理在籽粒产量不降低的同时节约了氮肥用量12. 8% ~33.3%;而实地氮素管理条件下,水稻扬两优6号和培两优3076均以SPAD值为39~41处理获得较高的籽粒产量和氮素利用率,该处理在籽粒产量不降低的同时节约了23.1%的氮肥用量。鉴于实地氮素管理在田间易于操作,因此建议采用39~41作为水稻关键生育期指导氮肥施用的SPAD阈值。

关 键 词:水稻品种    实时实地氮素管理    SPAD阈值    氮素利用率
收稿时间:2011-12-15

Yield and nitrogen use efficiency as influenced by real time and site specific nitrogen management in two rice cultivars
YI Qiong,ZHAO Shi-cheng,ZHANG Xiu-zhi,YANG Li,XIONG Gui-yun,HE Ping.Yield and nitrogen use efficiency as influenced by real time and site specific nitrogen management in two rice cultivars[J].Plant Nutrition and Fertilizer Science,2012,18(4):777-785.
Authors:YI Qiong  ZHAO Shi-cheng  ZHANG Xiu-zhi  YANG Li  XIONG Gui-yun  HE Ping
Institution:1.Key Laboratory of Plant Nutrition and Fertilizer,Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,China; 2 Guangdong Key Laboratory of Recycling of Nutrient Resources and Farmland Conservation/Institute of Soil and Fertilizer,Guangdong Academy of Agricultural Sciences,Guangzhou 510640,China;3 Institute of Plant Protection and Soil Fertilization,Hubei Academy of Agricultural Sciences,Wuhan 43
Abstract:Two rice cultivars of Yangliangyou 6(YLY6) and Peiliangyou 3076(PLY3076) were used in the field experiments to study the effects of SPAD values guided fertilization on nitrogen(N) uptake,yield and N use efficiency in two rice cultivars.The results showed that the N application rate,grain yield and N uptake increased with increment of preset SPAD values.Under real time N management practice(RTNM),the treatment of SPAD value for 41 obtained higher grain yield and N use efficiency for both YLY6 and PLY3076,besides,it could save N fertilizer by 12.8%-33.3% while maintaining almost the same yield level as compared with farmer’s practice(FP).Under site specific N management practice(SSNM),the treatment of SPAD value for 39-41 achieved higher grain yield and N use efficiency,and saved N fertilizer by 23% compared to FP.Taking the convenient management into consideration,it was suggested that the SPAD value of 39-41 would be adopted as the threshold value under the site specific N management practice.
Keywords:rice cuhivar  real time and site specific N management  SPAD threshold value  N use efficiency
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