水稻纹枯病菌的微气候生态位

Microclimatic niche of rice sheath blight fungus

运用生态位原理与方法,研究水稻纹枯病菌的微气候生态位.结果表明:照度、温度和湿度三者综合作用效应高于各单因子的独立效应,三因子中照度和温度的联合效应高于其他因子间两两组合效应;在分蘖盛期、孕穗期、抽穗期和蜡熟期,水稻纹枯病菌的微气候生态位宽度指数分别为0.3112、0.4012、0.4326和0.7365,即随着水稻的生长而逐渐增大,但病菌占有的生态位仍以低光照、低温度、高湿度的微气候类型为主.

By using the principles and methods of niche, the microclimatic niche of rice sheath blight fungus was analyzed. The results showed that the integrative effect of ecological factors light intensity, air temperature, and humidity was higher than the effect of each of the factors, and the combination of light intensity and air temperature had higher effect than the other combinations of the three factors. At the tillering, booting, heading, and waxing stages of rice, the microclimatic niche breadth of the fungus was 0.3112, 0.4012, 0.4326, and 0.7365, respectively, i. e., increased with rice growth, and the microclimatic niche occupied by the fungus was mainly with the low light intensity, low air temperature and high humidity as the prior microclimate type.