[关键词]
[摘要]
2006~2007年全国出现39块玉米超高产田,绝大多数集中在北纬40°~43°的高海拔地区,其特点是光照充足和昼夜温差大。产量在15000kg/hm2以上高产田的产量结构是79725~84630穗/hm2,每穗560~588粒,千粒重347~359g,穗粒重200g左右。高产配套栽培技术是生态条件优越地区,采用良种,合理密植,科学施肥和及时灌溉。
[Key word]
[Abstract]
Most of the 39 maize super-high yield plots emerged in 2006 - 2007 were located in the high elevation regions(40°N - 43°N) which were characterized by abundant sunlight and large temperature difference between day and night. In order to achieve the yield level of 15 000 kg/ha, the suitable yield components of super-high yield plots would be 79 725 - 84 630 ears/ha, 560 - 588 kernels per ear, the 1 000-kernel weight and the total kernel weight per ear would be 347 - 359g, 200 g, respectively. The corresponding cultural practices included the selection of suitable planting regions and superior varieties, reasonably dense planting, scientific fertilizer application and timely irrigation.
[中图分类号]
[基金项目]
北京农业育种基础研究创新平台项目(YZPT02)