The Research On The Material Recycling Mode Of "Cow-Earthworm-(Fish)Rice"

In recent years,the rapid development of animal husbandry,and gradually form a scale,resulting in a serious pollution of the ecological environment of aquaculture waste.How is conducive to the development of the breeding industry,and to reduce the destruction of ecological environment,sustainable development,is an important problem we must solve.Therefore,from the perspective of circular agriculture,this paper takes Guihe moderate scale cattle farm in Feidong County,Hefei City,Anhui Province as an example.The cow dung and straw are as raw materials of earthworm,sewage discharge standard as a feed for fish.earthworm cast are safely disposed by farmland.To achieve the purpose of reducing the amount of waste for moderate large-scale farms.On this basis,the formation of "cattle-earthworms-(fish)rice" circular agriculture model.In order to provide technical reference and theoretical guidance for the waste treatment of the same type farm.This study first of Guihe moderate scale cattle farm of on-the-spot investigation,according to local and regional characteristics and farms in the actual situation,the initial construction of the moderate scale cattle field farming cycle model,the model by feeding,waste treatment and safe disposal of three sub system.Cattle to earthworm breeding way of cow dung and straw,and ultimately the formation of Wormcast.In this paper,in the process of Vermicomposting of cow dung,testing the reproduction of earthworms and changes of the nutrients in the feces of earthworm.The experimental results show that the growth of the earthworm is best and the soil fertility is the highest when the ratio of carbon to nitrogen is 20:1.Compared with the carbon and nitrogen ratio of 25 groups,the daily reproductive multiple of earthworms cocoon reproduction were the largest,slightly higher than the carbon and nitrogen ratio of 20 groups,and the culture time was 45 d.Cattle farm wastewater and straw fermentation treatment,the sewage treatment station,purifying pond into the pond.This research carries on the monitoring of cattle farm wastewater,as indicated by the operation effect,COD,NH3-N,TP and SS removal rate reached99.1%,95.9%,98.3% and 99.3% respectively,can carry out sewage fish,fish ponds discharged water meets the requirements of GB5084-2005,and then irrigated farmland.Fish quality is also in line with the provisions of GB2760-2011.Through investigation and Research on farmland area of vermicompost safety consumptive matching.The experimental results show that: earthworm manure application amount 15 t / hm2 of rice growth status of the best.Analysis of economic benefit and ecological environment benefit of "cattle-earthworm-(fish)rice" recycling agriculture model,it shows that the model is economical and effective,and it has certain advantages in the eclogical environment.So the "cow-earthworm-rice" recycling agriculture model can be used as a model of large-scale farms.