池塘养鱼高产优质与技术改革

Technical Innovation for High Yield and High Quality in Pond Cultivated Fish

传统养鱼法的主要特点是多品种混养，靠施肥、投草，在高产目标驱使下过分强化这些措施易引起水质恶化，鱼病多发，商品鱼质量下降。作者从经济效益及市场需求出发，明确了主养鱼、配养鱼、带养鱼三者的产量比例，归结为“９３１养殖工程”，其主要内容是：采用全价颗粒饲料；鱼种在秋末一次放足，次年夏初捕“热水鱼”，并补放当年夏花鱼种，秋季干池上市；实行定额承包管理。

The feature of the traditional Chinese fish culture method is pond polyculture, in which the source of fish food depends on the application of fertilizer and grass. In pursuit of high yield, people are apt to overdo such practice , with the consequences of water quality deterioration, frequent occurrence of fish diseases, and declining quality of fish product. Considering from the angle of economic benefits and market demand, the author advocates the idea that the harvesting ( and the stocking ) ratio among the three fish ' staple fish ', ' supplementary fish ' and ' coordinating fish ' should be 9∶3∶1, known as the ' 931 Cultivation Engineering '. The employment of nutritious compounce pellet, stocking the fingerlings in late autumn all at once, harvesting a part of the fish reaching marketable size in early summer, followed immediately by supplementary stocking of summerlings ( i.e., fingerlings of the year ), and enforcing the contract out system of management constitute the main contents of this innovation.