旱地玉米不同种植方式生态效应初报——玉米膜外侧晚播栽培技术

A Preliminary Report of Ecological Effect on Different Planting Patterns of Corn——Late Sowing Technique Outside Plastic Shee tent

在半干旱地区(长治襄垣县),使用中单2号玉米品种,三年平均膜侧种植晚期播种比正常播期下膜内种植和露地种植亩增产155.2kg和199.6kg,增产率为30.8％和43.5％。究其原因,一是增温缓温;二是增墒节墒;三是适时晚播有利于促进光合产物的合成与积累。

Zhongdan No: 2 Corn Variety was used in the experiments in the semiarid area(Xi-angyuan County in Changzhi Municipality,Shanxi Province). There was an average yieldincrease of 155.2 kg and 199.6 kg per mu for 3 years in comparison of late sowing out-side the plastic sheet with normal planting inside the plastic sheet tent with normalplanting inside the plastic sheet tent and bare lands with an increasing rate of 30% and43.5% respectively. The studies of the causes showed that the first was to increase tem-perature;the second was to increase and save moisture;and the third was to sow cornright in late time,which was favourable in the synthesis and accumulation of photosyn-thetic products.