Chen Mingang, Jin Peihua, Huang Lingxia, Lu Xingmeng
College of Animal Sciences, Zhejiang University, Hangzhou 310029, China.
Ying Yong Sheng Tai Xue Bao. 2006 Feb;17(2):233-6.
Mulberry-silkworm ecosystem is one of the important agro-ecosystems in China. Based on the principles and methods of emergy analysis, this paper studied the interior structure of mulberry-silkworm ecosystem and its relationship with exterior environment and economy. Some emergy indices for this ecosystem were quantitatively calculated, and compared with those of the agro-ecosystem in China. The results showed that the emergy investment ratio, emergy yield ratio, environmental loading ratio and emergy sustainability index was 3.78, 4.68, 0.18 and 26.0, respectively, suggesting the low environmental pressure and good ecological benefit in mulberry-silkworm ecosystem in China. Hi-technology was required to further decrease the labor force input and enhance the comprehensive utilization of sericultural resources.
桑蚕生态系统是中国重要的农业生态系统之一。本文基于能值分析的原理和方法，研究了桑蚕生态系统的内部结构及其与外部环境和经济的关系。定量计算了该生态系统的一些能值指标，并与中国农业生态系统的指标进行了比较。结果表明，能值投资率、能值产出率、环境负载率和能值可持续性指数分别为3.78、4.68、0.18和26.0，表明中国桑蚕生态系统的环境压力较低，生态效益良好。需要高新技术进一步减少劳动力投入，提高蚕桑资源的综合利用率。
