不同种植方式对寒地水稻氮积累与产量的影响  

Effects of Different Cultivation Patterns on N Accumulation and Yield of Rice in Cold Region

作　　者：蒋毅[1] 吴振雨[1] 周婷[1] 罗盛国[1] 

机构地区：[1]东北农业大学资源与环境学院,哈尔滨150030

出　　处：《吉林农业科学》2015年第2期34-37,61,共5页Journal of　Jilin Agricultural Sciences

基　　金：科技部"十二五"科技支撑项目(2013BAD20B04)

摘　　要：采用龙优5号水稻为试材,通过田间试验,研究寒地直播稻与传统移栽稻氮素吸收及产量的差异,探明寒地直播稻的氮素积累规律,为直播稻施肥提供理论依据。结果表明,直播稻抽穗期和灌浆期叶片含氮量分别比移栽稻高10.2%(P<0.05)和10.0%(P<0.05),显著提高了叶片光合能力。成熟期籽粒氮积累量比移栽稻高16.1%(P<0.05),抽穗后氮同化量和氮同化贡献率分别比移栽稻高104.7%(P<0.01)和76.2%(P<0.01),氮肥偏生产力比移栽稻高37.2%(P<0.01)。直播稻穗粒数和千粒重显著提高,结实率也有所增加,产量比移栽稻高8.1%(P<0.05)。A field experiment with rice cultivar Longyou 5 was conducted to study the difference in N accumu-lation and yield of direct-seeded and transplanted rice in cold area to provide theoretical basis for N-fertilizer appli-cation on direct-seeded rice. Results showed that N contents in direct-seeded rice leaf at heading and filling stageswere 10.2%（P〈0.05） and 10.0%（P〈0.05） higher than that of transplanted rice, and the photosynthetic rate of di-rect-seeded rice leaf was significantly increased. The N accumulation in rice grains at maturity stage was 16.1%（P〈0.05） higher than transplanted rice grains. N assimilation and N assimilation contribution rate after heading of di-rect-seeded rice was 104.7%（P〈0.01） and 76.2%（P〈0.05） higher than transplanted rice, partial factor productivityof applied N of direct-seeded rice was 37.2%（P〈0.01） higher than that of transplanted rice, and the number of grainper panicle and 1000-grain weight was significantly increased. The filled grain rate were increased, and the yield ofdirect-seeded rice was 8.1%（P〈0.05） higher than transplanted rice.

关 键 词：寒地 直播稻 氮积累 产量 

分 类 号：S511.042[农业科学—作物学]