北方稻田养鱼的共生效应研究

Symbiotic effect of cultivating fish in rice field in north China.

北方稻鱼共生试验结果表明 ,稻鱼田稻谷产量略增 ;能量产投比和光能利用率分别比对照高 0 .0 8%和0 .1% ;土壤有机质高 0 .2 4% ;纹枯病发病率低 3 .8% ;纯收入每公顷增加 90 0元 ,表现出良好的共生效应 .

Experiment on rice fish symbiosis in north China showed that the ricce production in rice fish field was a bit higher than control,and the output input ratio of energy,utilization efficiency of solar energy and soil organic matter content increased 0.08,0.1 and 0.24%,respectively.The banded sclerotic blight incidence decreased 3.8% and the net economic income increased 900 RMB yuan per hectare.All the resuts showed that rice fish symbiotic system had a good symbiotic effect.