超高产春玉米产量构成特性分析

通过2年的田间试验,对吉林省桦甸市金沙乡不同产量水平玉米的产量构成因素进行通径分析。结果表明,低产处理产量构成直接通径系数大小顺序为穗粒数>千粒重>单位面积穗数,即无肥处理产量构成因素中对子粒产量影响最大的是穗粒数,其次为千粒重,单位面积穗数影响最小;高产处理产量构成直接通径系数大小顺序为单位面积穗数>千粒重>穗粒数,即高产处理产量构成因素中对子粒产量影响最大的是单位面积穗数,千粒重次之,影响最小的是穗粒数;超高产处理产量构成直接通径系数大小顺序为单位面积穗数>穗粒数>千粒重,即超高产处理各产量构成因素对子粒产量的相对重要性以单位面积穗数最大,其次是穗粒数,千粒重最小。

Yield Component Characteristic of the Spring Maize with Super-high Yield

Through 2 years of field experiments,the path analysis of yield components in the maize at the different yield levels was studied in Jinsha township of Huadian city,Jilin province.The results showed that the sequence of direct path coefficient of low yield was spike number > 1 000-grain weight > grain number per hectare,which indicated that spike number in yield component factors of low-productive was the most important factor influencing the grain yield,followed by 1000-grain weight,and grain number per hectare had the least influence.The sequence of direct path coefficient of high yield was grain number per hectare > 1 000-grain weight > spike number,which indicated that grain number per hectare in yield component factors of high-productive was the most important factor influencing the grain yield,followed by 1 000-grain weight,and spike number had the least influence.And the sequence of direct path coefficient of super-high-yield was the grain number per hectare > spike number > 1 000-grain weight,which indicated that grain number per hectare in yield component factors of super-high-yield was the most important factor influencing the grain yield,followed by spike number,and 1 000-grain weight had the least influence.