Benefit Analysis and Technical Design of Ecological Cultivation Model of"Rice-Fish-Duck"in Mountain Paddy Field
The ecological cultivation model of"rice-fish-duck"was carried out in the mountainous area of Qiandongnan Prefecture,Guizhou province.The total output value of rice paddy per 667 m2 reached 6 047.9 yuan,an increase of 4 237 yuan compared with that of rice monoculture,and the economic benefits were significant.The ecological cultivation model of"rice-fish-duck"can improve soil fertility.The results of soil samples showed that compared with before the test,the content of organic matter increased by 2.3～3.5 g/kg,the percentage of total nitrogen increased by 0.032％～0.052％,the content of available phosphorus increased by 2.2～4.3 mg/kg,and the content of available potassium increased by 2.0～16.0 mg/kg.It can also effectively control the harm of diseases pests and weeds,reduce the application of pesticides and fertilizers,reduce the environmental pollution of rice fields,and improve the quality of agricultural products.It has high economic,ecological and social benefits.
rice fields in mountainous areas"rice-fish-duck"modeltechnical routeeconomic analysis
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