摘要
本文以氮素循环为例,详细分析了康集生态农场的物流结构和循环效率。结果表明,康集生态农场自开发建设以来,已初步建成以林果农种植、家畜家禽饲养、鱼类养殖为主的物流结构系统。系统的氮素产投比逐年上升,平均达到0.255,种植业有机氮与无机氮投入比为1.19,系统稳定性指数为0.98,第二性生产的氮素转化率达19.94％,有机废物利用总量含氮11934.5公斤。根据整个系统在氮素利用上的潜力和物流状况,本文提出了提高系统氮素利用效率和增强系统稳定性的途径与措施。
Detailed analysis of the material-flow structure and recycling efficiency was conducted based on analysing the nitrogen cycling in Kangji Ecological Farm. The results showed that the farm has established an initial system of material-flow structure of plantation, forestry,poultry ,stock-raising and fishery. Within the system, the nitrogen output-input ratio between organic nitrogen and inorganic nitrogen is 1. 19,system stable index is 0. 980,nitrogen conversion efficiency of secondary production reaches 19.94%. The total recycling nitrogen from waste, organic material reaches 11934. 5 kg.Based on the potentials of nitrogen utilization and the state of material flow,measures for raising nitrogen conversion efficiency and enhancing whole system's stability were put forward.
出处
《生态农业研究》
CSCD
1994年第4期34-42,共9页
Chinese Journal of Eco-agriculture
关键词
生态农业
物流分析
氮素循环
Ecological agriculture
Material flow analysis
Nitrogen circulation
