山西东南部复播玉米高产模式研究

目的]研究山西东南部复播玉米高产模式。方法]开展玉米品种试验、密度试验和播期试验,采用随机区组设计,对产量及其构成因素和主要农艺性状表现进行比较。结果]泉玉2号、德美亚1号、Kxw116、科早玉3号增产潜力大,丰产性好,较适合采用小麦套种玉米的栽培形式。最适宜的种植密度为8.25万株/hm2,单产达7 670.5 kg/hm2。随播种期的推迟,玉米籽粒重和产量呈减少趋势,最佳播期为5月25日—6月5日。结论]该研究为玉米生产提供科学理论依据,促进玉米生产持续发展。

High Yield Model of Multiple Cropping Corn in the Southeast of Shanxi

Objective] High yield model of multiple cropping corn in the Southeast of Shanxi was studied . Method] The experiments of maize variety, density and sowing time were carried out, the design of random area was used to compare the yield and its component and the main agronomic traits.Result]Quanyu 2, Demeiya 1, Kxw116, Kezaoyu 3 had great potential to increase their production capacity and good fertili-ty, which were more suitable for the cultivation of wheat interplanting corn.The optimum planting density was 82.5 thousand plants/hm2 , the yield was 7670.5 kg/hm2 .With the delay of planting time, the grain weight and yield of corn showed a decreasing trend,the best sowing time was from May 25 to June 5.Conclusion]This study provided scientific theoretical basis for corn production and promoted the sustainable de-velopment of corn production.