山西东南部复播玉米高产模式研究

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

[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。

[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 fertility,which were more suitable for the cultivation of wheat interplanting corn. The optimum planting density was 82. 5 thousand plants/hm2,the yield was 7 670. 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 development of corn production.