微集流种植对旱作梯田作物生长与产量性状的影响

为了充分利用有限的降水资源提高农作物产量,在黄土丘陵区旱作梯田实施微集流种植与常规平作种植,测定作物的农艺性状指标值,研究不同种植方式下作物生长与产量性状的变化。结果表明,与传统平作法相比,微集流种植6—8月玉米株高平均提高47.2%,根系干质量增加187.79%,籽粒产量平均增收903.12 kg/hm2;在不同种植密度下,玉米植株的株高、抽雄率、生物产量、籽粒产量与对照方差检验值F在1%水平上存在极显著差异,水分利用率随种植密度的增加呈逐渐下降趋势,且与玉米产量性状指标之间均存在显著性线性相关关系。微集流种植能够有效地提高作物的水分利用率,从而显著地影响作物生长与产量性状。

Effect of Micro Rain-harvesting Planting on Crop Growth and Yield Performance in Arid Terrace

To make full use of limited rainfall resource and improve crop yield,a field experiment including micro rain-harvesting planting and conventional flat planting was conducted in arid terrace in arid and semi-arid hilly areas to determine crop agronomic characters through changes in crop growth and yield performances.The results showed that,compared with traditional cultivation method,average plant height of corn in June-August increased by 47.2%,root dry weight by 187.79%,the average grain yield increased by 903.12 kg/hm2 in micro rain-harvesting cultivation.There was significant difference in the variance test value of F at the 1% level about plant height,tasseling stage,biomass yield,grain yield under different planting densities.The water use efficiency showed a decreasing tendency with increase of planting density,the significant linear correlation existed in water use efficiency and yield performances.It is concluded that the micro rain-harvesting tillage methods could efficiently improve the water use efficiency which greatly affected the growth and yield of crop.