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以蒙群1、蒙群2、蒙群3、蒙群4、蒙A群、蒙B群、蒙C群共7个自有群体和中综5号、中综7号2个国内合成的群体以及3个加拿大引进群体C群1、C群2、C群3为供试材料研究产量相关性状的密度效应。试验设计采用二因素裂区试验设计,密度为主区,2个处理,分别为75 000、150 000株/hm2;玉米群体为副区,共12个处理。通过增密效应分析得出,在秃尖长、穗行数、行粒数、穗长、穗粗、百粒重产量性状中,行粒数和穗长适宜作为耐密的选择指标,蒙群2、蒙群4、蒙A群、蒙B群4个群体的耐密性优于其他8个群体;在抗性性状中,倒伏率和空秆率是衡量耐密性的重要指标,蒙A群、蒙群1、蒙群4、C群1、中综7号群体的耐密性优于其余7个群体。综合产量与抗性指标,蒙A群、蒙群4适宜增密种植,蒙群1、蒙B群、蒙C群、中综7号群体可适当增密,C群2、C群3、蒙群3、蒙群2、C群1、中综5号群体不适于增密。
In order to Mengniu 1, Meng Qun 2, Meng Qun 3, Meng Qun 4, Meng A group, Meng B group, Meng C group of a total of seven groups and Zhong Zong 5, Zhong Kao 7 2 domestic synthetic groups And three Canadian import groups C group 1, C group 2, C group 3 as the test material to study the density-related effects of yield-related traits. The experimental design was designed by two-factor split test design. The density of the main area and the two treatments were 75 000 and 150 000 plants / hm2, respectively. The maize population was sub-area with 12 treatments. According to the densification effect analysis, it was found that in the characters of bald length, number of rows per ear, number of rows per ear, ear length, ear diameter, 2, Meng Qun 4, Meng A group, Mongolian B group 4 population density better than the other 8 groups; resistance traits, the lodging rate and empty stalk rate is an important indicator of confidentiality, Meng A The population density of Mengnong 1, Mengnuan 4, C 1, Zhongza 7 was better than that of the other 7 groups. Comprehensive yield and resistance indicators, Meng A group, Meng Qun 4 suitable for planting density, Meng Qun 1, Meng B group, Mongolian C group, Zhong comprehensive 7 group can be properly encrypted, C group 2, C group 3, Mongolia Group 3, Group 2, Group C 1, Group No. 5 in the group is not suitable for increasing the density.