早稻不同生育期水稻-白背飞虱-拟水狼蛛食物链的能流动态研究

以能量为统计标准,系统地分析了不同水稻生育期稻田生态系统中水稻－白背飞虱（Sogatella furcifera)-拟水狼蛛（Pirata subpiraticus)的种群能流动态。结果表明：稻田能流分析法比单纯种群数量动态调查法更能科学、准确地反映不同水一育期白背飞虱的危害程度以及拟水狼蛛对白背飞虱的不同控制水平。早稻全期,同化效率：水稻＞白背飞虱＞拟水狼蛛;生长效率相反;白背飞虱的林德曼效率和消费效率明显低于拟水狼蛛。虽然在整个早稻期间白背飞虱出现两次（分蘖期、乳熟期）种群能量高峰期,但水稻各生育期的生态效率显示：拟水狼蛛对白背飞虱有良好的控制效应,唯有乳乳期为白背飞虱危害早稻较为严重的时期。

Energy Flow Dynamic of Food Chain Rice-Sogatella Furcifera-Pirata Subpiraticus at Different Rice Growth Stages

This study analyses systematically community energy flow dynamic of the food chain"rice- Sogatella furcifera-Pirata subpiraticus "in early rice field ecosystem.The results show that the energy flow method gains an advanage over the simple investigation of community number dynamic in reflecting scientifically and accurately the harm level of Sogatella furcifera and the different control levels of Pirata subpiraticus to Sogatella furcifera at different rice growth stages.As to the whole early rice growth stage,rice's assimilation efficiency is higher than that of Sogatella furcifera, and much higher than that of Pirata subpiraticus's contrary to their growth efficiencies.Lindeman efficiency and consumption efficiency of Sogatella furcifera are much higher than that of Pirata subpiraticus. Though there are two peak stages of Sogatella furcifera community energy flow during the whole early rice growth stage,ecologe efficiencies show that Pirata subpiraticus can control Sogatella furcifera efficiently and milking stage should be more careful since it is the only sensitive stage to Songatella furcifera.