种植密度对复播荞麦生长发育及产量的影响

Effect of Planting Density on Growth and Yield of Multiple Cropping of Buckwheat

通过分析不同种植密度下复播荞麦生育期、农艺性状、产量及干物质积累的变化,探讨新疆麦茬复播荞麦合理栽培密度。研究结果表明:种植密度对荞麦生长发育有显著影响,对生育时期、节间长、节数、分枝数、千粒重等性状影响较小,对产量及其构成因素影响较大。随种植密度增大,株高升高,植株叶片数减少,单株干物质积累量降低,单位面积土地干物质积累量在种植密度增大时先升高但在密度超过120万株/hm^2后下降,产量同样在种植密度升高时先升高但超过120万株/hm^2后降低;奇台荞麦在新疆麦茬复播的合理栽培密度为120万株/hm^2,在此密度下产量最高综合表现最好。

Analyzed the change of cropping buckwheat on growth period, agronomic traits, yield and dry matter accumulation under different planting density, which was to discuss reasonable planting density of cropping buckwheat in Xinjiang. The results showed that planting density had a significantly effect on yield, yield component and growth and development of buckwheat, but had a less impact on the growth stages, internode length, node number, branch number and thousand seed weight. With increasing planting density, the trait of plant height increased, No. of leaf and dry matter accumulation per plant decreased. Dry matter accumulation per unit area increased at first, but it decreased more than 1.2 milllion plants per hectare, and the yield had the same results.The reasonable planting density buckwheat was 1.2 milllion plants per hectare in Qitai county, Xinjiang. It had the highest yield.