摘要
连续五年较大面积的田间中试表明，稻田人工生物圈每年鲜鱼亩产量２５０ｋｇ，稻谷产量比常规种稻高４％～６％，化肥用量减少５０％～６０％，农药用量减少５０％，经济效益明显高于单季稻、制种田和双季稻等传统耕作制。作者认为，实行不同萍种混养，鱼苗自育自繁以及田间工程标准化、田间管理规范化是新耕作体系增产增收的关键，并讨论了稻田人工生物圈对提高生态、社会效益的意义。
A continuous 5-year demonstration in large area showed that,the annual fish product in artifi-cial biosphere of paddy field was averaged to 250kg/Mu,grain yield was 4%-6%higher,fertilizer-ap-plying amount decreased 50%-60%,pesticide dosage reduced 50%to compare with conventional crop-ping system,and the economic benefit was obviously higher than the traditional farming system,such as mono-cropping rice,seed-producing for hybrid rice and double cropping rice. The authors considered that,Keypoints for increasing the output and income of New Cropping System were mix-culture of var-ious azolla species,self-multiplication of fingerlings by farmers,standarization of field ditch-pit system and normalization of field-managing practices.The significance of artificial biosphere for improving bio-logical and social benefits was also discussed.
关键词
水稻
红萍
鱼
人工调控
效益
Rice
Azolla
Fish
Artificial controlling
