核桃 小麦间作对小麦生长发育及产量形成的影响

为了探讨核桃-小麦间作对小麦生长发育和产量的影响,在核桃-小麦间作(简称"核-麦间作")条件下研究了核桃树遮荫对不同小麦品种生长发育、光合特性及产量构成因素的影响。结果表明,核-麦间作复合群体中,冠下区小麦的生物量、穗粒数、穗粒重、千粒重、收获指数、产量和旗叶、倒2叶、倒3叶的净光合速率均明显小于远冠区,且不同品种间具有相同的规律。烟农22在冠下区和远冠区的净光合速率、产量及产量的主要构成因素均明显高于DH155、绵麦48、绵麦37和新冬20。在果粮间作复合栽培模式下,对耐荫、高产小麦品种的筛选,其光合生产能力可作为重要的考核指标,同时还要注重小花和小穗结实性状的考查。

Study on Growth, Development and Yield Formation of Wheat under Walnut wheat Intercropping System

We studied the influence of walnut shading on growth,development,photosynthesis and yield of different wheat varieties under walnut-wheat intercropping model.The results showed that plant weight,grains per spike,grains weight per spike,1000 grains weight,harvest index,yield,the photosynthesis of flag leaf,inverted second leaf and inverted third leaf of wheat under the crown of walnut trees were lower than that far away from the crown,meanwhile,different varieties had the same trends.However,the photosynthesis,yield and its components of Yannong 22 were higher than that of DH155,Mianmai 48,Mianmai 37 and Xingdong 20.As a result,in walnut-wheat intercropping system,photosynthesis,florets and total spikelets were the important assessment indexes for wheat varieties selection.