摘要
通过对正方形和传统垄作栽培模式下不同群体密度的产量表现及相关的产量性状进行研究,结果初步表明,正方形最佳田间密度为15.32株·m^-2,最高理论产量为2585.70 kg·hm^-2;垄上双行栽培最佳密度为19.9株·m^-2,最高理论产量为3159.35 kg·hm^-2;垄上双行最高产量高于正方形栽培;单株产量的有效株行距为62.43 cm×62.43cm,与传统垄作垄距65～70cm是接近的,说明对于繁茂型晚熟大豆品种而言,传统的65～70cm垄作模式仍然不失为一种实用有效的栽培技术模式。7月中旬以后旱情导致LAI在R4期下降;在R4和R6期,25.0～44.4株·m^-2不同密度间的LAI,传统垄作高于正方形模式;在分枝期（V6）干物质积累量最低,同期根冠比相对最高,表明前期是根系发育优先期;在R6期从5.9～36.6株·m^-2密度范围内,传统垄作栽培模式单株干物质积累值显著高于正方形栽培模式;与平作为特点的正方形栽培相比,传统垄作模式有利于根系发育。
The object of this work is to study on the yield under different plant density and characteristics related to yield between square and conventional ridge systems as the base work for improving yield of late maturity soybean varieties. The results were as follows： The maximum seed yield were estimated as 2 585. 70 kg per hectare with the density of 15.32 plants per square meter for square system,as 3 159. 35 kg per hectare with the density of 19. 9 plants per square meter for conventional ridge system,and the maximum yield of conventional ridge system was higher than square system. Effective plant/row spacing of seed weight per plant was 62.48 cm ×62.43 cm, and this value was similar to 65～70 cm ridge spacing of conventional ridge system. Conventional ridge system still played an important role for the thrifty late maturity variety. Leaf Area Index （LAI） fell at R4 stage due to rought after second ten days in July; and between R2 and R4 stage LAI under conventional ridge system was higher than that of square system significantly,from 25.0 to 44.4 plants per square meter. The mean values of dry weight per plant accumulated were the lowest at V6 stage meanwhile the ratio between root and shoot were the highest,and this indicated that roots developed in priority at early stage of the growing period. At R4 stage, dry weight per plant accumulated were higher than conventional ridge system significantly, from 5.9 to 36. 6 plants per square meter. Compared with square growing system, the practices of conventional ridge system were propitious to the development of root systems.
出处
《黑龙江农业科学》
2008年第5期33-37,共5页
Heilongjiang Agricultural Sciences
基金
国家"十一五"科技攻关项目(2006BAD21B01)
黑龙江省"十一五"科技攻关项目GA06B101-1-2)
关键词
大豆
群体配置
正方形栽培
传统垄作
soybean [Glycine max （L.）Merr.]
distribution of the population
square system
conventional ridge system
