To make fall 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.%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.
展开▼
