稻—再生稻—小龙虾稻田综合种养经济效益分析

Analysis of economic benefit of rice-ratooning rice-crayfish integrated cultivation in paddy field

为充分利用光温资源,在稻—小龙虾种养模式的基础上,进行稻虾综合种养,与再生稻种植相结合,开展稻—再生稻—小龙虾综合种养技术模式研究。设置4种种养模式,分别是种植中稻(MR)、种植再生稻(RR)、中稻—小龙虾综合种养(MRC)和稻—再生稻—小龙虾综合种养(RRC),分析不同种养模式对稻虾产量和经济效益的影响。结果表明,(1)RR的全年水稻产量均高于MR产量,再生季稻的产量约为头季稻产量的1/4,RRC模式水稻产量最高。(2)MRC和RRC模式养虾田水稻产量的提高主要通过较高的穗粒数和千粒重来实现。(3)稻—再生稻—小龙虾综合种养模式的产值、利润和产投比均最高,分别为102754元//hm^(2)、64704元//hm^(2)和2.70。综合来看,稻虾综合种养模式与再生稻模式相结合,能提高稻谷总产量,降低生产成本,具有较好的经济效益,是一种资源高效型、环境友好型的种养方式。

In order to make full use of light and temperature resources,on the basis of integrating shrimp in rice field model,the combination of rice-crayfish comprehensive planting and breeding and ratooning rice planting was carried out,and the rice-ratooning rice-crayfish comprehensive planting and breeding technology model was studied.Four kinds of models were set up,including planting middle rice(MR),planting ratooning rice(RR),middle ricecrayfish comprehensive(MRC),rice-ratooning rice-crayfish comprehensive(RRC),and the effects of different models on rice-crayfish yield and economic benefits were analyzed.The results showed that(1)The annual rice yield of ratoon rice was higher than that of middle rice,the yield of ratoon rice was about 1/4 of that of main crop rice,and the rice yield of RRC model was the highest.(2)The increase of rice yield in MRC and RRC models was mainly achieved by higher grain number per spike and 1000-grain weight.(3)The output value,profit and output-input ratio of rice-ratoon ricecrayfish comprehensive planting and breeding model were the highest,which were 102754 yuan/hm^(2),64704 yuan/hm^(2) and 2.70 respectively.On the whole,the combination of rice-shrimp integrated planting and breeding model and ratooning rice model could improve the total rice yield,reduce the production cost,and have better economic benefits,it is a resource-efficient and environment-friendly planting and breeding method.