Studies on selection of summer maize varieties with resistance to planting density and suitable for mechanical harvesting in Hebei province

• 1、College of Agronomy, Hebei Agricultural University，State Key Laboratory of North China Crop Improvement and Regulation，Key Laboratory of Crop Growth Regulation of Hebei Province, Baoding, Hebei ?071001, China

Abstract：In order to screen maize varieties suitable for grain harvesting in Hebei Province, field experiment was conducted at Mazhuang Experimental Station of Hebei Agricultural University from 2018 to 2019. 20 maize varieties were used as materials under 3 densities (6.0×10, 7.5×104, and 9.0×104 plantsoha-1), and stalkmechanics characteristics, lodging resistance, grain moisture content, mechanical harvest character and yield of different varieties were analyzed systematically. Factor analysis and fuzzy membership function method were used for comprehensive evaluation of different varieties. The results showed that ZH1632, Zhangli 1, Jingnongke729 performed best overall, with 21% - 25% moisture content, high density tolerance, relatively high yield and large fluffy bracts, which were beneficial to the late grain dehydration. This study is of great significance to guide the selection of suitable varieties for mechanical harvest and the cultivation of high quality, high yield and high efficiency of maize.

Keywords： maize grain mechanical harvest variety selection stalk mechanics characteristics yield