摘要
水稻半旱式垄作栽培技术(又称水田自然免耕技术)的推广运用为稻田资源的综合开发利用,尤其是稻田高产养鱼奠定了物质和技术基础。它比较合理地解决了传统淹水平作水稻和传统稻田养鱼中存在的种稻与蓄水,种稻与养鱼,养鱼与晒田,养鱼与化肥、农药施用,水稻与杂草,水稻与病虫等方面的问题,水稻增产显著,成鱼产量大幅度提高,一般可达750—2250kg·ha^(-1),高者3750kg·ha^(-1)以上。物质循环和能量转化的成倍增加,势必对稻田生境和土壤肥力产生影响。因此,搞清楚传统淹水平作稻田起垄后的垄作稻田和垄作养鱼稻田的土壤结构和土壤肥力的变化规律,对指导开发稻田资源,实现稻鱼双丰收具有重要的意义。
Studies of soil structure and soil fertility in ridged paddy field and ridged piscicultural paddy field were carried out in comparison with traditional waterlogging paddy field in Sichuan province in 1987.Results showed increases in 0.01mm water-stable microaggregates and aggregation coefficient of 0.01mm soil particles. There was a tendency towards increase in mineral-cemented aggregate and deerease in soil potential fertility in ridged paddy field,but in ridged piscicultural paddy field, a significant increase in organic matter and a higher nutrient content and availability were observed because of the increase cf organic material-cemented aggregates,in which,Fe Al-humus cemented aggregates were dominant. With lime application and field sunning after fishing, high yield of rice could be reached without or with little fertilizer application.
出处
《生态学杂志》
CAS
CSCD
北大核心
1989年第1期22-26,共5页
Chinese Journal of Ecology
关键词
稻田
土壤结构
肥力
soil structure, soil fertility, paddy field, pisciculture.
