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采用生态经济学的方法,对稻鸭共作稻田系统的农产品生产、大气调节、涵蓄水分、土壤有机质积累与营养元素保持的生态服务功能价值进行了估算和综合分析。结果表明,稻鸭共作系统生态服务功能的价值量为18104.82元/hm2,比常规稻作系统高15.64%左右。其中,稻鸭共作系统物质生产的功能价值为6720元/hm2,所占比例为37.12%;环境调节功能价值量为11384.82元/hm2,主要表现为调节大气、土壤养分积累与营养元素保持,两者对环境调节功能价值的贡献率可达77.48%。而常规稻作系统的环境调节功能主要表现为调节大气,单项所占的比例为65.34%。稻鸭共作与常规稻作系统涵蓄水分功能的价值对环境调节总功能价值量的贡献率相差不大,分别为14.16%和17.60%。稻田养鸭兼顾了控制农田生态系统的温室效应、维持和保育土壤肥力等,更有利于稻田系统各项生态服务功能的充分发挥。
Based on the method of ecological economics, the ecological service function of agricultural products production, atmospheric regulation, storage of water, accumulation of soil organic matter and maintenance of nutrients in rice-duck farming system was estimated and analyzed. The results showed that the value of ecological service function of rice-duck cooperative system was 18104.82 yuan / hm2, which was 15.64% higher than that of conventional rice-growing system. Among them, the functional value of rice-duck co-production system was 6720 yuan / hm2, accounting for 37.12%; the value of environmental regulation function was 11384.82 yuan / hm2, mainly for the regulation of atmosphere, soil nutrient accumulation and nutrient element maintenance, The contribution rate of environmental regulation to the value of up to 77.48%. However, the environmental regulation function of conventional rice cultivation system is mainly regulated by the atmosphere, with the proportion of individual items being 65.34%. The contributions of rice-duck cooperatives and conventional rice-farming system in terms of water storage function have little difference with the total functional value of environmental regulation, which are 14.16% and 17.60% respectively. Rice paddy ducks also take into account the greenhouse effect of controlling farmland ecosystems and the maintenance and conservation of soil fertility, which are more conducive to the full play of various ecological service functions of paddy field systems.