耕作方式对玉米出苗率、干物质积累及产量的影响

Effect of Different Tillage Systems on the Seeding Emergence Rate,Dry Matter Accumulation and Yield of Maize

在吉林省公主岭市研究探讨不同耕作方式对玉米出苗率、干物质积累及产量的影响，创制提高玉米产量的适宜的耕作方法。以郑单958为试材，利用吉林省农科院长期定位试验田，对免耕、翻耕、旋耕和深松4种耕作方式下玉米出苗率、干物质重及产量比较分析。结果表明，深松耕作保苗率提高11．3％-14．6％，深松耕作显著提高玉米干物质重，其地上部分较免耕、翻耕和传统耕作提高幅度为4．9％-19．2％，地下部根系提高幅度为2．8％-90．1％。深松耕作较其他处理玉米产量增幅为8．3％-11．5％，留茬深松是促进玉米植株生长发育和提高产量的有效耕作技术。

In the study, the effect of different tillage systems on maize growth was studied, and the optimal tillage system was proposed. Taking maize cultivar Zhengdan958 as experimental material, four tillage systems, including no tillage, plow tillage, rotating tillage and spacing tillage, were conducted in Gongzhuling of Jilin Province, China. Some morphological and physiological traits including seedling emergency rate, dry weight, and grain yield of Zhengdan958 were analyzed. The results showed that the seedling emergency rate of spacing tillage was increased by 11.3%-14.6%, and compared with others. Meanwhile, spacing tillage improved the above-ground dry matter weight of maize was increased by 4.9%-19.2%, and improved the underground root dry matter weight of maize from 2.8% to 90.1% compared with other tillage systems.