以郑单958为试验材料,2011年在河南新乡设置耕作方式与种植密度田间试验,研究条带深松耕作方式对不同密度夏玉米群体产量性能的调控效应,明确条带深松耕作方式下夏玉米产量性能特征。结果表明,条带深松耕作方式下,夏玉米获得最高产量的最适密度为9.0×10⁴株/hm²左右,较常规耕作方式下增加16.9%,平均增产10.9%。进一步分析高密度(9.0～10.5)×10⁴株/hm²群体下夏玉米产量性能参数,条带深松耕作方式分别增加收获穗数、穗粒数、千粒重、干物质积累量、群体平均叶面积指数、平均净同化率、产量/平均叶面积指数比值分别为9.7%～10.5%、6.5%～8.2%、7.0%～7.7%、9.1%～12.4%、6.7%～9.2%、7.2%～9.1%、3.6%～17.1%。条带深松耕作方式通过产量性能参数的共效差异补偿机制实现密植夏玉米增产。

A field trail using variety Zhengdan958 with tillage systems and densities was conducted in Xinx-iang, Henan Province during 2011 growing season to study the regulation effect of strip sub-soiling tillage system on yield performance for summer maize in high planting density, and make clear the yield performance characteristics for summer maize in strip sub-soiling tillage system. The results showed that in strip sub-soiling tillage system, pop-ulation optimum density was about 9.0×10⁴ plants/ha which was increased by 16.9% and yield was improved by 10.9% than conventional tillage system. In high planting density population(9.0×10⁴-10.5×10⁴ plants/ha), harvest ear number, grain number per ear, 1000-grain weight, dry matter weight, mean leaf area index, mean net assimila-tion rate and yield/mean leaf area index ratio were increased by 9.7%-10.5%, 6.5%-8.2%, 7.0%-7.7%, 9.1%-12.4%, 6.7%-9.2%, 7.2%-9.1% and 3.6%-17.1%, respectively in strip sub-soiling tillage system.

国家粮食丰产科技工程项目(2011BAD16B14)