宁夏盐池四墩子草地农业生态系统力能学研究

Studies on Energetics of Grassland Agricultural Ecosystem at Sidunzi, Yanchi Connty, Ningxia Hui Autonomous Region

四墩子草地农业生态系统初级生产太阳能转化率偏低(0.056％);次级生产能量转化效率较高(3.92％);系统能量产投比较高(2.57);系统的稳定性和阶段自持力较强;其开放程度高。但系统内部投能分配不合理,应加强对旱地和人工草地的辅助能投入。

The efficiency of solar energy conversion into the primary production was lower (0.056%). The gross efficiency of conversion of animal products was higher (3.92%). The ratio of outputs/inputs of the supplementary energy of the system was higher (2.57). The system had a firm stage self-maintaining ability and a good stability. The open degree of the system was higher. However, the distribution of supplementary energy was not rational within the system. The increasing of supplementary energy input for the dryland and the artificial grassland is necessary.