通辽地区玉米不同覆膜方式技术效果分析

Technological effects analysis of different plastic film mulching modes for maize in Tongliao

为探讨不同地膜覆盖方式的增产机理,完善玉米地膜覆盖栽培技术,试验采用裸地不覆膜种植方式为对照,比较了行上覆膜和行间覆膜种植方式的玉米叶面积指数、干物质积累、产量及其构成因子。结果表明：技术效果排序为行上覆膜〉行间覆膜〉裸地不覆膜,行上覆膜方式的玉米生育期较其他方式提前4-6 d;具有生长快,健苗壮体等优点;对玉米主要经济性状分析可知,覆膜方式增加了玉米穗长、百粒重和出籽率,减少了秃尖长,其中行上覆膜方式从产量和各项测试指标都优于行间覆膜和裸地不覆膜方式。

In order to explore the yield increasing mechanism of different plastic film mulching modes, and improve the maize mulch techniques, leaf area index, accumulation amount of dry matter, yield and its components were compared between the two maize planting methods, covering film between rows （CBR） and covering film on rows （COR）, using no covering film （CK） as control. The results showed that technological effects of COR was the highest, followed by this of CBR and CK. Growth period of COR was 4-6 days earlier than other methods. Ear length, hundred-grain weight and kernel rate were increased and bare tip length was decreased by covering films. Yield and the tested indexes of COR was better than these of CBR and CK.