不同水分条件下苦豆子种子产量及其构成因素研究

对田间不同水分条件下苦豆子(Sophora alopecuroides)种子产量及其构成因素进行了研究,结果表明:苦豆子种子产量高达1 806 kg/hm2。水分是影响苦豆子种子产量的主要因素,其中降低生殖枝分化率及抑制生殖枝的生长是水分控制苦豆子有性繁殖的2个主要途径。研究还表明,在干旱生境中,苦豆子有性繁殖与无性繁殖存在显著竞争,而在水分充足条件下,则其竞争性减弱。这一研究结果对控制苦豆子种群的扩散及危害有一定价值。

Study on seed yield and its components of Sophora alopecuroides under different water regimes

Study on seed yield and its components of Sophora alopecuroides under two water regimes was conducted and the results showed that the seed yield of S. alopecuroides was very high and reached 1 806 kg/hm2. Water was the major factor controlling seed yield which by reducing reproductive branch differentiation and retarding its growth. Also, there was a strong competition between vegetative growth and reproductive growth under drought habitat, but this competition decreased while water was sufficient. The research results obtained in this study might be practically used in controlling the population spreading and threaten of S. alopecuroides to grassland.