The Impact of Rice-Frog-Pseudorasbora Parva Integrated Farming on Soil Physical and Chemical Properties and Rice Yield
To explore the impact of the integrated rice,frog,and fish farming model on the physical and chemical properties of paddy soil and rice yield,a large-scale field experiment was conducted from May to October in 2022 in Mingyue Vi-llage,Lukou Town,Changsha County.The rice monoculture without chemical fertilizers and pesticides(CK)and the con-ventional rice monoculture(HX)were used as controls,and two integrated farming models,rice+bullfrog+Pseudorasbora parva(DNY)and rice+spotted frog+Pseudorasbora parva(DHY),were established.The nutrient content,physical and chemical properties,and rice yield of the soil under different models were comparatively analyzed.The results showed that in terms of soil nutrients,both DHY and DNY treatments could enhance the availability of nutrients in the soil.The activi-ties of frogs and fish can accelerate the dissolution of total nutrients,thereby increasing the nutrient content in the soil,but there was no significant difference in the organic matter content of the soil.Regarding the physical properties of the soil,compared with the HX treatment,the total porosity,capillary water-holding capacity and capillary porosity of the soil in the DHY treatment increased by 14.7%、31.7%and 16.6%,respectively,while the bulk density decreased by 7.1%,and all differences reached significant levels,indicating an improvement in capillary water-holding capacity,total porosity,capilla-ry porosity,and a reduction in bulk density.In terms of rice yield,the thousand-grain weight in the DNY treatment was higher than that in the HX and CK treatments,but the difference was not significant,and there was no significant difference in the actual yield among all treatments.In summary,the integrated rice,frog,and wheat-ear fish farming model is benefi-cial for improving soil nutrients,increasing soil organic matter content,improving soil structure,and achieving stable pro-duction goals.
ricecompound cultivationsoilphysical and chemical propertiesyield
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