种植密度对常规谷子产量及群体特征的影响  

Effects of Planting Density on Yield and Population Character of Common Millet Species

作　　者：栾素荣[1] 张玲[1] 王艳芝[1] 丁贵江[1] 王占廷[1] 李青松[1] 

机构地区：[1]承德市农业科学研究所,河北承德067000

出　　处：《河北农业科学》2013年第3期1-5,共5页Journal of Hebei Agricultural Sciences

基　　金：国家谷子糜子产业技术体系项目(CARS-07-12.5-B4)

摘　　要：以常规种谷子品种承谷13号、朝谷13号和宽九为试材,采用裂区试验设计,研究不同种植密度(30.0万、37.5万、45.0万、52.5万和60.0万株/hm2)对谷子产量和群体特征的影响。结果表明:种植密度为30.0万～60.0万株/hm2时,随密度的增大,叶绿素含量逐渐增大,叶面积指数和地上部干物质产量升高,透光率逐渐降低,产量表现为先增加后降低。常规谷子高产的群体特征为种植密度37.5万～45.0万株/hm2、开花期叶面积指数4.30～4.63,经济系数高,群体透光性较好。并对不同种植密度下开花期谷子的群体特征(叶面积指数、叶绿素含量、地上部干物质产量、透光率)与产量进行多元逐步回归分析,结果显示,仅地上部干物质产量与产量存在显著的回归关系。再通过对地上部生物产量和经济系数与产量进行通径分析发现,地上部干物质产量是获得高产的物质基础,但受经济系数制约较大。The effects of different planting densities（30.0×104,37.5×104,45.0×104,52.5×104,60.0×104 plants/hm2）on yield and population character of Chenggu No.13,Chaogu No.13 and Kuanjiu were studied by split block test design.The results showed that under the planting density of 30.0×104-60.0×104plants/hm2,with the increasing of planting density,chlorophyll content,leaf area index,dry materials above ground were increased gradually,transmission rate was decreased gradually,yield was increased first and then decreased.The population characters of the three normal foxtail millet were that the planting density was 37.5×104-45.0×104 plants/hm2,leaf area index at following stage was 4.30-4.63,economic index was higher and transmission of light was better.The results of multiple regression analysis on population characters and yield under different planting densities at following stage showed that there was significant regression relationship between dry matter yield aboveground and yield.The results of path analysis on dry matter yield aboveground,economic coefficient and yield further showed that dry matter yield aboveground was the material foundation for high yield,but was restricted by economy coefficient obviously.

关 键 词：谷子 密度 产量 群体特征 

分 类 号：S515[农业科学—作物学]