施氮量对早稻抛秧产量及其构成因素的影响  

Effects of Nitrogen Application Rate on Yield and Yield Components of Early Rice under Throwing

作　　者：刘诗晴 梅少华 兰斌 梅金安 翟中兵 张从德 陶江 魏坦雄 何德志 

机构地区：[1]湖北省武穴市农业局,湖北武穴435400 [2]湖北省武穴市花桥现代农业示范中心,湖北武穴435400 [3]湖北省红安县农业局,湖北红安438400

出　　处：《湖北农业科学》2013年第24期5996-5998,6039,共4页Hubei Agricultural Sciences

基　　金：国家科技支撑计划重大项目(2011BAD16B02);农业部粮食高产创建项目;湖北省优质稻板块基地建设项目(2011183)

摘　　要：以杂交早稻两优302为试验材料,研究了不同施氮量对早稻免耕抛秧和翻耕抛秧生育特点及产量的影响。结果表明,施氮量对免耕抛秧和翻耕抛秧影响趋势相同,随着施氮量的增加,高峰苗和叶面积系数增加,成穗率降低;当施氮量为180 kg/hm2时,有效穗数和每穗粒数最多;随着施氮量的增加,结实率和千粒重呈下降趋势;施氮量和产量之间呈抛物线关系,以施氮量为180 kg/hm2的产量最高。Early hybrid rice Liangyou 302 was used as materials to study effects of nitrogen rate on growth characteristics and yield of early rice under no-tillage throwing and tillage throwing.The results showed that the N application rate has the same effect on early rice under no-tillage throwing and tillage throwing.With the increase of N application rate,the peak seedling and leaf area index increased,but the percentage of earbearing tiller,maturing rate and 1 000 grain weight were decreased.However,when the N application rate was 180 kg/hm2,number of panicles per plant and number of grains per panicle were the highest.Moreover,the relationship between nitrogen rate and yield was consistent with quadratic parabola.The yield was the highest when the N application rate was 180 kg/hm2.

关 键 词：早稻 施氮量 耕作方式 产量 产量构成因素 

分 类 号：S511.31[农业科学—作物学] S506.2