河套地区不同玉米品种套种小麦的比较研究

The Comparative Research of Different Maize Variety and Wheat Intercropping in Hetao Areas

在河套灌区进行不同玉米品种同小麦套种的研究,通过增加密度(6000株/667m2)与传统品种(巴单3号)和常规密度(4000株/667m2)对比研究,产量表现为浚单20>内单314>巴单3号>永玉3号>真金8号。其中浚单20和内单314产量比对照增产17.1%和10.2%,密度增加后穗行数基本不变,行粒数降低,增产主要是由于亩穗数增加。浚单20和内单314水分利用效率分别比对照增加20.08%和15.33%。浚单20和内单314最大叶面积指数达到7～8,前期干物质积累在灌浆前期高于其他品种,为产量提高提供充足的源。

Intercropping of different maize varieties with wheat was studied by increasing maize plant density-6000 plant per mu while The conventional variety Badan3 was cultivated 4000 plants per mu. the comparative results showed that the yield was in a sequence of Xundan20〉ND314〉Badan3〉Yongyu3〉Zhenjin8. Comparing with Badan3, the yield of Xundan20 and ND314 increased by 17.1% and 10.2% respectively. Ear rows were almost invariant and kernels per row reduced, so yield increasing was owing to ears per mu increasing. Comparing with Badan3, the water use efficiency of Xundan20 and ND314 increased by 20.08% and 15.33% respectively. For Xundan20 and ND314, the largest leaf area index reached 7-8 and dry matter accumulation content before filling stage was higher than other varieties, so this would be large source for yield increasing.