实时实地氮素管理对水稻产量和氮素吸收利用的影响  

Yield and nitrogen use efficiency as influenced by real time and site specific nitrogen management in two rice cultivars

作　　者：易琼[1,2] 赵士诚[1] 张秀芝[1] 杨利[3] 熊桂云[3] 何萍[1] 

机构地区：[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 [2]广东省养分资源循环利用与耕地保育重点实验室,广东省农业科学院土壤肥料研究所,广州510640 [3]湖北省农业科学院植保土肥所,武汉430064

出　　处：《植物营养与肥料学报》2012年第4期777-785,共9页Journal of Plant Nutrition and Fertilizers

基　　金：国家重点基础研究发展计划课题(2007CB109306)资助

摘　　要：以扬两优6号和培两优3076水稻为材料,通过田间试验研究了基于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12.8%～33.3%的氮肥用量;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,因此建议采用将39～41作为水稻关键生育期指导氮肥施用的SPAD阈值。Two rice eultivars 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 soeeifie N management practice.

关 键 词：水稻品种 实时实地氮素管理 SPAD阈值 氮素利用率 

分 类 号：S511[农业科学—作物学]