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作 者 ：王缨,雷慰慈

期 刊 ：生态学报 2000年 20卷 2期 页码：311~316

关键词：稻田；生态效益；种养模式；稻-鱼-鸭体系；

Keywords:rice fields, ecological effect, plant breeding model, rice fish duck system,

摘 要 ：1991年在湖北潜江进行了一个包括 5个处理、3个重复的随机区组试验 :处理 A,普通稻田 ,不养鱼 ( CK) ;B,垄稻沟鱼 ,宽、深各 3 3 cm的小沟中养鱼 ;C,B+横沟或围沟 ,深 50 cm,宽 3 3 cm,或加一小坑 ,宽 1～ 2 m,深 1 m,长度以占小区 8%的面积为准 ,养鱼 ;D,B+大围沟 ,宽 2 m,深 2～ 2 .5m,占小区面积的 1 5%,养鱼 ;E,D+鸭。结果表明 ,在酷暑 7、8月份 ,宽而深的大沟的水温比窄而浅的更适于养鱼 ;水溶氧量、浮游生物和底栖动物量都以宽而深的沟为高 ,特别是加了鸭的。本课题组提出的“回”字型大沟鱼、鸭兼养模式还能大幅度提高土壤氮、磷、钾、有机质含量 ,且具防治稻田杂草、病、虫的作用。其对稻、鱼的增产作用当无疑。

Abstract:A random block experiment consisted of five treatments was conducted.Treatment A was an ordinary paddy field with no fish.B was rice planted on the ridge and fish reared in the little ditch,with the width and depth of ridges or ditches of 33cm;C was the same as B except the ridges and ditches are larger in width and depth;D was same as B except the large surrounding ditch of 2m in width and 2.0～2.5m in depth,occupying 15% area ;E,D+ducks.\;The results indicated that in July and August,the temperature in the...

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