摘要
在野外调查和实验数据分析的基础上 ,运用生态经济学原理研究了稻田养蟹模式的结构与功能、物流能流特征及其经济效益与生态环境效益 .结果表明 ,与单一稻作模式相比 ,稻田养蟹模式的综合效益较高 .从经济效益看 ,后者的土地纯收入、成本收益率和劳动生产率比前者分别增加 382 %、6 7.7%和2 95 % .从生态环境效益看 ,养蟹一年后 ,土壤中的TN、碱解N、TP、速效P、速效K和有机质分别增加10 .6、3.3、5 .8、11.7、3.5和 10 .5 % ,且每年可削减非点源N污染负荷 6 .375kg·hm-2 .
Based on field investigation and experimental data analysis,ecological economic principles were applied to study the structure and function,the characteristics of material and energy flows,and the economic and ecological benefits of a rice crab model.The resutls show that rice crab model had a higher integral benifit than rice model,and its net income,cost benefit ratio,and labor productivity were increased by 382%,67.7% and 295%,respectively.In view of the ecological benefits produced,the total nitrogen,alkaline hydrolyzal nitrogen,total phosphorus,rapidly availlable phosphorus,rapidly available potassium,and organic matter in the soil after 1 year carb breeding were increased by 10.6%, 3.3 %,5.8%,11.7%,3.5% and 10.5%,respectively.Moreover,6 375 kg N·hm -2 of non point source pollution load could be cut down annually.
出处
《应用生态学报》
CAS
CSCD
2002年第3期323-326,共4页
Chinese Journal of Applied Ecology
基金
北京生物源生物工程有限公司资助项目
北京师范大学环境模拟与污染控制国家重点实验室开放基金资助项目 (WES970 2 )
关键词
稻田养蟹模式
生态经济分析
生态农业
Rice crab model, Ecological economic analysis, Ecological agriculture.
