摘要
本文对江苏北部浜海盐土区多年围田养鱼和作物轮作实践效益进行了总结。指出在该项技术条件下,土体盐分按Fick定律向上扩散能带走盐分460kg/亩,0-50cm土层含盐量从0.22％下降到0.14％。因饵料沉积、鱼体排遗和水生植物光合作用。相当投入鲜质绿肥3881.3kg/亩,改土效果显著。计算结果表明渔业系统熵的92.1％为轮作粮食产生的负熵抵销,并从方法论角度讨论了此项研究的系统土壤学意义。
Rotation of fishery and crops with encircled farm field blocks emerging in the saline soil districts of north Jiangsu coastal zone, is a progressive technique for saline soil reclam ation in recent years. The principles of the soil reclamation and the economic benefits of this technique which has been popularized to different districts were discussed and summed up in this paper. The fishery system entropy and the farmland system entropy were caculated and the resarts showed that the fishery system entropy may be counterbalanced by the negentropy of the later. From the point of view of methodology, the systematic pedological significance of this technique was given.
出处
《江苏农学院学报》
CSCD
1989年第2期17-20,共4页
Jiangsu Agricultural Research
关键词
养鱼业
盐土
轮作
熵
系统土壤学
saline soil
fish-crop rotation
entropy
systematic pedology
