摘要
研究以一个种养结合的更新橡胶园系统能量的输入输出关系,从能流、物流和价值流方面对系统状态进行了综合分析。结果表明:该胶园能量产投比值为2.5,呈良好的生产态势;经过5年的生态农业建设,土壤有机质含量提高1.5倍,氮、磷、钾素呈积累趋势;人均年收入为1579.9元,经济效益较高。在用生产优势度和稳定性指数对系统状态评价的基础上,通过灰色关联分析对系统的结构调整提出如下建议:合理选择耐荫间作物,提高群体光能利用率;增加次级生产投能,培育产值高、品质优的家禽、畜产品;兴建一座沼气池,加长畜禽残留物的综合利用环节。
An energy input/output relationship in a multiple—land—use system of a rep- lanted rubber plantation was studied,and states of this system comprehensively anal- yzed in terms of energy flow,material flow and price flow.The results are as follows:1)The energy input/output ratio was 2.5,indicating better productivity: 2)Organic matters increased by 1.5 times with an accumulating tendency for N,P and K over the five years of eco—agricultural groundwork;3)Good economic benefits were obtained with the annual per capita income being RMB 1579.5. On the basis of the evaluation of the system states by applying productive supe- riority and stability index,Grey Connecting Analysis was conducted,and suggestions for the structural adjustment of the system are made as follows:1)Raise the solar energy utilization rate for plant communities by selecting shade—tolerant crops suit- able for intercropping;2)Increase input to produce quality livestook and poultry with high output value;3)Establish a biogas digester to make full use of the wastes.
出处
《热带作物学报》
CSCD
1993年第1期103-111,共9页
Chinese Journal of Tropical Crops
关键词
橡胶树
种植园
系统分析
rubber tree
plantation
ecosystem
systematic analysis
