摘要
60cm行距种植时,单株的短果枝数、短果枝总荚数和短果枝总粒重均较多,而且随着密度的增加,单株的短果枝数、短果枝总荚数和短果枝总粒重均呈递减趋势。短果枝的分布主要集中在株高40~60cm处。不同种植方式对短果枝的分布有一定的影响,与60cm行距的情况相比,30cm行距下短果枝的分布有上移的趋势,不同种植密度对短果枝的分布也有影响,随着密度的增加,植株下部短果枝分布比例逐渐减小,植株上部分布比例逐渐增大。与短果枝性状不同的是,由于长花序着生在植株顶端,因此长花序受种植方式和种植密度的影响较小。不同种植方式和种植密度下,短果枝籽粒所占的比例为13.7%~26.2%。60cm垄距有利于短果枝的着生,短果枝籽粒所占的比例较大,尤其以15.0万株/hm2密度下所占的比例最大,达到26.2%。不同种植方式和种植密度下,长花序籽粒所占的比例变幅较小,为5.2%~10.1%。在60cm行距种植密度不高于15万株/hm2的情况下,长花序短果枝株型大豆沈农6号的产量潜力发挥较好。
The Yield characteristics of soybean variety Shennong 6 with long floral axis and short pod branch characteristics were studied under different row spaces and different seeding rates from 1999 to 2000.The results were as follows: In 60 cm row spaces, the number of short pod-branch, the total pods and the seed weight in short pod-branches were more than those in 30cm row spaces. As the increments of seeding rates, the number of short pod-branch, the total pods and the seed weight in short pod-branches would increase. The short pod-branch mainly set at the 40~60cm of plant height. Compared with that in 60 cm row space, the setting position of short pod-branches would be higher in 30 cm row space.The seeding rate also had effect on the setting position of short pod-branches, as the increments of seeding rates, the setting ratio at the lower part of plant height would be smaller, but that at the higher part would be bigger. Row space and seeding rate had weaker effects on the long floral axis as compared with those on short pod-branch. The rate of seed weight at short pod-branches/total seed weight per plant ranged from 13.7% to 26.2% under different row spaces and different seeding rates. 60 cm row space was better for short pod-branch performance. The change range was smaller for the rate at the long floral axis under different row spaces and different seeding rates, only from 5.2% to 10.1%. Shennong 6 soybean variety preferred 60 cm row space and the seeding rate no more than 150 000 plants/hm^2.
出处
《辽宁农业科学》
2004年第6期1-5,共5页
Liaoning Agricultural Sciences
基金
国家自然科学基金 (3 9870 447)
教育部
辽宁省骨干教师资助计划的资助
关键词
大豆
长花序
短果枝
产量性状
Soybean
Long floral axis
Short pod-branch
Yield characteristics