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一、试验目的目前,传统的稻田养鱼经验,虽然“稻鱼”有共生互利关系,但也存在着一对矛盾。养鱼需要一定深度的水位,而水稻生长则要求以浅水勤灌为主,在一定的生长阶段需排水搁田,喷施农药,这对养鱼是不利的。为了彻底解决上述矛盾,设计了“鱼—稻”茬口布局试验,1988年3月15日在低塘田里灌水放养一定规格、品种的鱼,随后在7月27日捕捞,接着插上单季晚稻,从而为鱼、稻生长创造一个良好的循环生态环境。二、材料与方法 (一)试验方案根据当地生产特点,选择了长年只种一熟单季晚稻的低塘田8.5亩为试验田,并以相邻不养鱼的稻田为对照。土壤肥力中等偏下,
First, the purpose of the test At present, the traditional experience of paddy fish farming, although the “rice fish” symbiotic mutual relations, but there are also a pair of contradictions. Fish require a certain depth of water, while rice growth requires shallow droughts mainly in certain stages of growth to drain aside fields, spraying pesticides, which is detrimental to fish farming. In order to completely solve the above contradiction, we designed a “fish-rice” stubble layout experiment. After March 15, 1988, a certain size and variety of fish were irrigated in the low-lying field and then caught on July 27, followed by a single season Late rice, so as to fish, rice growth to create a good recycling environment. II. MATERIALS AND METHODS (I) Experimental plan According to the characteristics of local production, 8.5 mu of low-lying field with only single-crop single-cropping late rice as experimental field for many years was selected as experimental field and paddy fields with no adjacent fish culture were used as control. Low soil fertility,