While in the water, they are easily eaten by fish. These factors combine to increase rice production in fields stocked with fish. Conclusion Ricefields provide an ecological environment that is suitable for both rice and fish. When ricefields are stocked with fish, the fish eat food organisms and organic detritus. Energy and material that used to be lost are captured and converted into fish protein.
Fish kill pests and weeds and excrete feces to the field.
In addition, fish movements promote air exchange and distribution of fertilizer. There are contradictions between rice and fish when applying fertilizer and pesticides and draining fields. In recent years, these contradictions have been resolved by digging ditches and pools, applying fertilizer to all layers of the field, and applying pesticides that are highly efficient and have low toxicity. Therefore, further improvements are still required. Copyright International Development Research Centre.