不同穗型品种小麦高产栽培条件下产量构成因素对产量的影响

Analysis on Yield and Components of Wheat Varieties with Different Spike Type in High-yield Cultivation

通过对我市700kg/667m2小麦高产创建所用的品种类型作材料,分析了不同穗型品种小麦在700kg/667m2超高产栽培中的产量及其构成因素相互间的影响表现,指出在700kg/667m2高产栽培中条件下,不同穗型品种小麦单位面积穗数对产量所起的主导作用主要是通过影响穗粒重来实现的。大穗型品种超过35万穗/667m2因穗粒数剧烈下降而穗粒重表现明显下限趋势,中穗型品种超过45万穗/667m2穗粒数和千粒重均表现明显下降,穗粒重也表现出大幅度降低。但在各品种适宜的群体穗数范围内,中穗型品种穗粒重最稳定。在700kg/667m2小麦高产创建中,中穗型品种小麦为首选品种,其次是多穗型品种,在栽培中确保合理群体穗数,主攻穗粒重。

Utilizing the wheat varieties used to 700kg/667m^2 high-yield trails as materials in our city,analyzed the yield and the mutual influence performance of the yield components in 700kg/667 m^2 super- high-yield cultivation in wheat varieties with different spike type. Pointed out that the dominant role of spikes per unit area to yield played by affecting the grain weight per spike in wheat varieties with different spike type. When the density of large spike type more than 350,000/667 m^2,the grain weight per spike will decline very clearly beacause of the decling of grain number per spike. When the density of middle spike type more than 450,000/667 m^2, the grain number per spike and 1000-grain weight will decline clearly, grain weight per spike demonstrated a significant reduction. However,in the context of the appropriate group spikes of all varieties, grain weight per spike of the middle spike type performed the most stable. With 700kg/667 m^2 high-yield, wheat varieties with middle spike type will be preferred, the wheat varieties with large spike type will be secondary. In the cultivation based on the rational group of spikes,improving the grain weight per spike will be the main task.