论文部分内容阅读
河沟的特点一般都是狭窄而长，地形上跨村、跨乡或跨县。我区河沟很多，且多数长年流水，水位较浅，水草茂盛，饵料生物资源丰富，溶氮技高，是河已生长的好水域。目前河沟多采取分段由乡、村或个人承包拦养。本人将多年从本河沟养技的生产经验总结如下。一、养四河沟的选择水
The characteristics of the river ditch are generally narrow and long, across the village terrain, cross-township or county. There are many river ditches in our district, and most of them run for many years. The water level is shallow and the plants are lush. The food is rich in biological resources and has high dissolved nitrogen. It is a good water area where the river has grown. At present, the river valleys are mostly sub-contracted by townships, villages or individuals. I will from the river for many years Gougou production experience summarized as follows. First, the choice of four rivers ditch water