Author(s): HOU Hai-peng, DING Zai-song, MA Wei, LI Cong-feng, ZHAO Ming, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences /Key Laboratory of Crop Physiology and Production, Ministry of Agriculture
Pages: 71-75+83
Year: 2015 Issue:  6
Journal: Journal of Maize Sciences
Keyword:  Summer maize; Strip sub-soiling tillage system; High density planting; Yield;
Abstract: 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 onyield performance for summer maize in high planting density, and make clear the yield performance characteristicsfor summer maize in strip sub-soiling tillage system. The results showed that in strip sub-soiling tillage system, pop-ulation optimum density was about 9.0×104plants/ha which was increased by 16.9% and yield was improved by10.9% than conventional tillage system. In high planting density population(9.0×104-10.5×104plants/ha), harvestear 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.