冬小麦主要性状的密度效应分析

以密度设置为基础，对晋南冬小麦主要性状进行了动态分析。结果表明，穗数、穗粒数、株高等性状在高、低密度下的差异较大，这些性状在杂种后代选择中宜在高密度下进行，选择单株的基本苗以１５０万苗／ｈｍ２为宜，选择单穗的基本苗以２２５万～３００万苗／ｈｍ２为宜。叶面积系数在基本苗２００万苗／ｈｍ２密度下相对较小，此叶面积系数条件下库、源、流较协调，同化物生产积累最经济。在当地水肥条件下，大田生产基本苗以３００万苗／ｈｍ２左右为宜。

Effect of Basic Seedling on Winter Wheat for Main Characters

On the basis of density, the main characters of winter wheat in the south of Shanxi province were dynamically analyzed in the article.The result shows the difference among ears per hectare, grains per ear and plant height are bigger under high or low density. The suitable selection of these characters in crossbreed is under high density. The suitable basic seedling of selecting single plant and single ear is respectively 1 500 and 2 2503 000 thousands per hectare. The suiable basic seedling of field production is 3 000 thousands per hectare or so under the condition of local irrigation and fertilization, and among varieties there has some difference. The granary, source and flow coordinated, the production of assimilator is the most economic efficiency under the condition of leaf area coefficient.