为明确条带深松耕作方式下夏玉米产量性能特征,以郑单958为试验材料,于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提高夏玉米种植密度和产量的调控效应。结果表明,条带深松耕作方式下,夏玉米群体最适密度比常规耕作方式下增大16.9%,平均增产10.9%。高密度群体下,条带深松耕作方式分别增大了收获穗数、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%。由以上结果可以看出,条带深松耕作方式通过产量性能参数的差异补偿机制实现密植夏玉米群体增产的效果。
英文摘要:
The objective of this study was to make clear the yield performance characteristics for summer maize in strip sub-soiling tillage system, a field trail using variety Zhengdan958 with tillage systems and densities was conducted in Xinxiang, 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. Results showed that in strip sub-soiling tillage system, population optimum density was increased by 16.9% and yield was improved by 10.9%. In high planting density population, harvest ear number, grain number per ear, 1000-grain weight, dry matter weight, mean leaf area index, mean net assimilation 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%、3.6%-17.1% respectively in strip sub-soiling tillage system. Our results indicated that the “asynchronous improved compensation” of yield performance parameters was the main mechanism of formation of high yield in high planting density population in strip sub-soiling tillage system.
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