Study On The Comprehensive Benefit Evaluation And Optimization Of The Integrated System Of Crop-livestock Pig Farming In China

Since the reform and opening up,my country’s agricultural productivity has been greatly improved.However,with the improvement of large-scale and intensive level,the trend of separation of crop and livestock is more and more obvious,and the area-source pollution is more and more serious,which hinders the process of sustainable development of agriculture.Pig industry is an important pillar industry of agricultural economy.It has made great achievements in pork supply and large-scale level.The overall quality of the industry has undergone a qualitative leap.However,environmental pollution and food safety problems still exist.The promotion of healthy and sustainable development of pig industry has been widely concerned by the society.The "environmental storm" has caused a huge impact on the pig industry.The transformation and development of pig industry is imminent.It is necessary to reconstruct the agricultural cycle chain of crop and livestock integration,and adhere to the stable improvement of agricultural comprehensive benefits.Based on this,this paper uses a large number of first-hand data of pig farmers to prove the superiority of the Integrated Crop-Livestock farming system through empirical research.To optimize the Integrated Crop-Livestock system in different scale pig farms to achieve the optimal state of comprehensive benefits,This has practical significance for the healthy development of pig industry.This study is based on the scientific answer to whether the integrated system has higher comprehensive benefits than the of the single,and the overall goal of "how much to plant" and "how much to raise" can achieve the optimal comprehensive benefits in the actual production process,based on 238 questionnaires from 8 typical pig breeding provinces in China,and combined with the existing research,14 comprehensive benefit evaluation indexes were selected to establish the comprehensive benefit evaluation index system of agricultural system of Integrated Crop-Livestock Of Pig Farms.After the index data is standardized,AHP entropy method is selected to determine the weight of the index;The comprehensive benefits of pig farms were calculated by linear weighting method,and the differences between integrated way and single way were compared.In this paper,the comprehensive benefit optimization model of integrated crop-livestock of Pig Farms is established,and the breeding scale and biogas digester scale are optimized and simulated according to the actual cultivated land area.Finally,the research conclusions and corresponding countermeasures are obtained.The main conclusions of this study are as follows: the comprehensive benefit value of integrated system is significantly higher than that of the single;The comprehensive benefit value increased first and then decreased with the expansion of culture scale,and there were different peak valley values in different culture scale;After optimization,the comprehensive benefit of the integrated system is higher than that before optimization;Economic efficiency is still the primary goal of pig farmers;The resource allocation in the system is unreasonable,and there is a certain amount of waste of assets.Based on the research conclusions,this paper puts forward the following countermeasures and suggestions: first is to establish farmland nutrient management and refine the management system of septic pits for reclaiming pollutants;the second is to cultivate and raise fields and promote systematic farming and rearing;the third is to make full use of the biogas project to raise the ground and raise the farms;The fourth is to establish the mechanism of punishment and reward to improve the enthusiasm of integrated crop-livestock.