基于氮平衡的种养结合沼液资源化利用研究

研究沼液经济性消纳对提高沼液资源利用率、维持沼气工程稳定运行、缓解养殖带来的环境压力、提升农业废弃物资源化利用效率和经济效益,推动种养循环一体化发展具有重要意义。为此,结合农业废弃物资源化利用方式,基于盈亏平衡分析和秸秆资源化利用模型,以沼液经济性消纳半径为核心,探究了沼气工程投资金额和处理规模之间的关系,提出了沼液经济性消纳模型。研究结果表明:沼气工程投资金额与处理规模之间关系性较强(R 2=0.9842);沼液经济性消纳半径R bsa选取的主要影响因素是运输费用和沼液中N含量,不同消纳区域农业生产系数的差异性也会对经济性消纳半径的评估产生影响。利用模型对江西新余南英垦殖场规模化沼气发电工程(SBPGP)沼液经济性消纳半径进行估算,在保证氮平衡基础下,其沼液最小消纳范围在31.94 km 2左右。沼液经济性消纳模型的构建,为以沼气工程为纽带的种养一体化循环模式提供了技术参考,从经济性视角为循环农业发展提供了理论依据,从而实现经济效益与环境效益协调发展的目标。

Integrated Planting and Breeding System Biogas Slurry Resource Utilization Analysis of Based on Nitrogen Balance

In order to promote the process of biogas slurry resource utilization,improve the utilization efficiency and economic benefits of agricultural waste recycling,promote the integrated development of planting and breeding cycle and improve the ecological environment.In this paper,waste utilization mode of agriculture,based on Breakeven Analysis and straw resource utilization model,biogas slurry economic absorptive radius is taken as the core,it explores the relationship between biogas project investment amount and processing scale is explored,and Biogas slurry economic absorptive mode is proposed.Research indicates,the relationship between investment amount and processing scale of biogas project is strong(R 2=0.9842).The main influencing factors selected by R bsa are transportation cost P and N content in biogas slurry.The difference in the agricultural production coefficient from the selection of different absorption areas will also affect the assessment of the economic absorption radius.Estimation of the biogas slurry economical absorption radius of the Scale biogas power generation project of Jiang xi nan ying(SBPGP),under the guarantee of nitrogen balance,the minimum digestion range of its biogas slurry is about 31.94km 2.And verify the crop N demand in the consumption area,which is consistent with the fitting results.And verify the crop N demand in the consumption area,which is consistent with the fitting results.The construction of biogas slurry economical consumption model strengthens the relationship between planting and breeding,and promotes the development of circular agriculture.Provide complete economic guidance for the development planning of circular agriculture.Fitting the economic laws of biogas projects,improving the economic content of biogas projects,and providing guidance for the economic evaluation of biogas projects and the construction planning of biogas projects.This is a good attempt to combine agricultural engineering development with social and economic development.