原州区全膜双垄集雨沟播条件下玉米品种优化研究

在全膜双垄沟播栽培条件下，进行不同海拔区域品种优化鉴选，对生物学性状、抗逆性以及适应性分析，鉴定筛选出金穗9号、榆单88、先玉335、超于1号、德美亚等适宜不同海拔、生态区域栽培的高产优质高抗普通玉米新品种。在海拔1800m以下区域内，金穗9号、郑单958、登海3672、先玉3354个品种平均单产达12000kg／hm^2以上，较当地主栽品种（长城706）增产6．5%-14．3％；在海拔1800-1900m区域内，榆单88、先玉335、超玉3个品种平均单产达11250kg／hm^2以上，较当地主栽品种（长城706）增产9。6％-11．6％；在海拔大于1900m区域内，超玉1号、长城706、德美亚等品种种平均单产达7536kg／hm^2以上，较当地主栽品种（登海1号）增产11．6％-23．7％。

Optimization Research of Corn Variety under the Condition of All Film Covering Double Ditch Cultivation in Mountain Area of Southern Ningxia

Under the condition of all film covering double ditch cultivation, varieties of different altitude region were optimized. The biological character, anti-adversity and adaptability analysis were carried out, the study showed that Jinsui 9, Yudan 88, Xianyu 335, Chaoyu 1, ect was suitable to different elevation and ecological areas. Within an altitude of 1 800 m areas, the average yield of Jinsui 9, Zhengsui 958, Denghai 3672, Xianyu 335 was more than 12 000 kg/hm2, and the yield increased by 6.5%-14.3% than local introduced cultivation variety; At an altitude of 1 800-1 900 m area, the everage yield of Yudan 88, Xianyu 335, Chaoyu was more than 11 250 kg/hm^2, and the yield increased by 9.6% -11.6% than local introduced cultivation variety; At an altitude of more than 1 900 m area, the average yield of Chaoyu 1, the Great Wall 706 was more than 7 536 kg/hm^2, and the yield increased by 11.6%-23.7% than local introduced cultivation variety.