环境因子对竹子开花影响研究

Study on the Influence of Environmental Factors on Bamboo Bloom

四川雅安地区刺竹和水竹开花年(2001～2006年)1月均温分别高出未开花年(1985～2000年)和多年(1985～2006年)平均值0.29℃和0.225℃;7月均温分别高出未开花年和多年平均值0.958℃和0.697℃;开花年年降水量分别比未开花年和多年平均值少124.9mm和90.8mm。开花和未开花水竹林小生境生态因子的调查显示,处于阳坡、光照条件好的样地开花明显多于处于阴坡、光照条件较差的样地;林内温度和湿度与竹子开花显著相关,开花样地内早上9时和中午2时平均温度和湿度均比未开花样地高。表明充足的光照、较高的林内温度、湿度,干旱和气温的升高在一定程度上起到了诱导和促进竹子开花的作用。

The results showed that both the average air temperature in January and in July when bamboo （ Chimonobambu- sa pachystachys and Phyllostachys heteroclada） flowered （ during 2001 - 2006） was higher than that in common years （ 1985- 2006） in Yaan, Sichuan Province. The annual precipitation in the years when bamboo flowered was less than that in the other years. The niche factors of the flowering bamboo forest and non-flowering bamboo forest were investigated. The results showed that sunny slope forests flowered more readily compared to shady slopes. Temperature and humidity have significant effects on the behavior of bamboo flowering, for example, the average temperature and humidity of flowering forest were higher than the one of non-flowering forest at nine o＇clock and fourteen o＇clock. In summary, plenteous-light, drought, high- er temperature and humid environment were suggested to induce or promote bamboo to flower to some extent.