The paper summarizes previous researches,presents a new type of complex ecological planting and breeding technology with more economic benefits of mallard displace of duck.Compared with single rice cultivation,it promoted early onset of tillers and rice root growth development,increased rice yield by 9.04%,which was nearly 6 times profit per unit area and more than 36% on variable compression ratio(VCR).Rice-mallard complex ecological planting and breeding technology made a far-reaching significance on improving the economic efficiency of rice field and mobilizing the en...