种植密度对扬糯麦1号籽粒产量与群体质量的影响

Effects of Planting Density on Grain Yield and Population Characteristics of Waxy Wheat Variety Yangnuomai 1

为给糯小麦高产栽培提供参考,以扬糯麦1号为材料,设置了135×104、180×104、225×104、270×104和315×104株·hm-2五个密度水平,分析了种植密度对糯小麦籽粒产量与群体质量的影响。结果表明,扬糯麦1号孕穗期及开花期叶面积系数、开花期及成熟期干物质积累量与密度呈显著线性正相关,分蘖成穗率与密度呈极显著线性负相关,花后干物质积累量和粒叶比与密度呈显著二次曲线关系。在215×104～238×104株·hm-2种植密度下,产量达8 000kg·hm-2以上,此密度区间可作为糯小麦正常播种条件下的适宜密度范围。

Seedling density is a fundamental factor affecting population parameters,grain yield,and quality of wheat.With waxy wheat（Triticum aestivum）Yangnuomai 1as test variety,the influences of planting density（135×104,180×104,225×104,270×104 and 315×104 plants·hm-2）on population characteristics and grain yield were studied.Leaf area index（LAI）at the stages of booting and anthesis,and the amount of dry matter accumulation（DMAA）at the stages of anthesis and maturity were positively correlated with seedling density（P0.05or P0.01）.Earing percentage of tillers, however,was negatively correlated with seedling density（P0.05）.Both the DMAA post-anthesis and the ratio of grain to leaf had quadratic correlations with seedling density（P0.05）.LAI at stages of booting and anthesis,earing percentage of tillers and the DMAA at the stages of anthesis and maturity had quadratic correlations with grain yield.The DMAA post-anthesis and the ratio of grain to leaf were positively correlated with grain yield（P0.01）.The density range of 215×104～238× 104 plants·hm-2 was suitable to Yangnuomai 1with a yield of more than 8 000kg·hm-2 under the normal.