江苏里下河洼地高效稻田生态系统研究

Maximizing Productivity of Paddy Field Systems in Low-lying Lixiahe District

稻鱼共生结构的水稻单产比单一的水稻结构增加3.3—22.3％。并可产鱼514—841kg/ha和改善土壤肥力。稻谷产量不受放养鱼种类、鱼苗规格影响,但受有机肥投入量及种类的影响。沼水作为饵肥可显著挺高稻、鱼产量。

Concurrent culture of rice and fish produced fish of 514—841 kg/ha in addition to the incrcaces in rice grain yields by 3.3-32.3％ compared with the simplc rice culture. Soil fertility was also improved. The results showed that for wheat—rice + fish pattern rice yield was insignificantly affccted by the sorts and sizes of fry, but grcatly affected by the sorts and sorts of organic manure applied. The application of biogas water to paddy fields could increase the yields of both rice and fish.