深松和密度互作对北方春玉米生长特性的影响

Effect of Interaction between Deep Scarification with Density on Spring Corn Growth Characteristics in Northern China

本试验以伟科702、先玉335为供试材料,采用裂区试验设计,分析深松与耕作密度互作方式对玉米植株生长生理特性及产量的影响。结果表明:深松措施提高了玉米高密度种植条件下的根冠比,有效改善了玉米营养器官干重的分布比例,提高了植株的抗倒伏性,降低玉米果穗秃尖程度,显著增加了玉米产量。其中伟科702经过深松处理后,种植密度在83 100株/hm^2时玉米产量达到最大值13 140 kg/hm^2,较不深松处理产量最大值(11 975 kg/hm^2)增产9.73%;先玉335经过深松处理后,种植密度在74 200株/hm^2时玉米产量达到最大值12 663 kg/hm^2,较不深松处理产量最大值(11 392 kg/hm^2)增产11.16%。

A field experiment of Weike 702 and Xianyu 335 as experimental materials was conducted to researchthe effects of deep loosening and cultivation density on maize growth physiological characteristics and yield. The re-sult showed that by using deep loosening measure, root shoot ratio and loding resistance were increased under thecondition of high planting density, the distribution proportion of vegetative organs of maize dry weight was improvedeffectively, and reducing the degree of corn ear barren tip, the yied of maize was increased significantly. The yield ofWeike 702 reached the maximum at the density of 83 100 plant/hm^2, and yied maximum was 13 140 kg/hm^2, theyield of deep loosening was 9.7% higher than that of the control（11 975 kg/hm^2）. The yield of Xianyu 335 reachedthe maximum at the density of 74 200 plant/hm^2, and yield maximum wse 12 663 kg/hm^2, the yield of deep looseningwas 11.16% higher than that of the control（11 392 kg/hm^2）.