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垄畦法稻、萍、鱼共生技术是一条山区冷浸田生态综合改良利用的新途径。1988年青田县土肥站在推广水稻垄畦法技术的同时,引进稻萍养鱼技术,并逐步形成垄畦法稻、萍、鱼共生技术。即在垄畦挖沟(坑),垄畦上种稻,沟中养鱼,水面养萍;以萍饲鱼,鱼粪肥田,以鱼除虫灭草。当年5.2亩单季晚稻试验田,亩产稻谷457.0公斤,鲜鱼58.0公斤,达到稻鱼双丰收,亩产值达829.6元,大大提高了经济效益。近几年来,永嘉、松阳、景宁等县山区也相继开展垄畦法稻、萍、鱼共生技术的试验示范,据不完全统计,1990年至1993年累计示范面积已达
Ridge ridge method rice, Ping, fish symbiosis technology is a mountain cold dip field ecological comprehensive improvement and utilization of new ways. Soil and fertilizer stations in Qingtian County in 1988 to promote rice ridge technology at the same time, the introduction of rice Ping fish farming techniques, and gradually form a ridge of rice, Ping, fish symbiosis technology. That ditch furrow (pit), Ridge on the rice, furrows in the water, water surface Ping; Pingping fish, fish manure fields, the fish pest weeds. In the same year, 5.2 mu of single-season late rice experimental field produced 457.0 kilograms of rice per mu and 58.0 kilograms of fresh fish, achieving a double-harvest of rice and fish, with a per-mu yield of 829.6 yuan, greatly improving economic efficiency. In recent years, Yongjia, Songyang and Jingning counties and mountainous areas have also carried out experimental demonstration of rice, Ping and fish symbiosis technologies. According to incomplete statistics, the cumulative demonstration area reached between 1990 and 1993