生态与农村环境学报2024，Vol.40Issue(8)：1006-1016,11.DOI:10.19741/j.issn.1673-4831.2023.0558
不同地形区秸秆和粪尿的养分结构差异及替减化肥潜力分析:以安徽省为例
Analysis of Nutrient Structure Differences and Potential for Substitution and Reduction of Chemical Fertilizers in Straw and Manure from Different Topographical Regions:A Case Study of Anhui Province
摘要
Abstract
In light of the widely accepted principles of sustainable development,optimizing the utilization of crop straw and human-livestock-poultry manure has emerged as a crucial goal.Agricultural production and lifestyle are constrained by topography,causing notable disparities in the composition,distribution,and environmental benefits of crop straw and ma-nure in areas with different topographic characteristics.Differential analysis is therefore needed to lay the foundation for tar-geted development of sustainable utilization and management strategies for organic wastes.In this study,Anhui Province serves as a typical research case.Initially,the dissimilarities in the production scale and structural composition of crop straw and manure across three distinct topographic types in Anhui Province including plains,hills and mountainous regions are systematically assessed using methods such as structural difference index.Subsequently,by comparing nutrient supply and demand relationships,the potential contribution of straw and manure to fertilizer substitution is analyzed.The results demonstrate that from the perspective of inter-regional nutrient structure difference index,the nutrient structure difference indices of N,P2O5 and K2O in the plain-mountain comparison group are the highest,with 0.86,0.84,and 1.13,respec-tively,while that in the hill-mountain comparison group are the lowest,with 0.26,0.25,and 0.25,respectively.In terms of regional considerations,it is only in hilly areas that recycled straw and manure can completely substitute chemical fertil-izers in supplying essential nutrients required for crop growth,while plain regions are inadequate in providing N and P2O5,and mountainous areas are deficient in P2O5.With respect to nutrient types,although the amount of K2O needed for crop growth is more than that of N and P2O5,K2O is the only nutrient that can be fully satisfied by reusing straw and manure in all regions with different topographic characteristics.Additionally,the nutrient structure compositions of hilly and moun-tainous areas remain relatively similar,and there is a significant difference compared to plain areas.In particular,the source difference of nutrient-K2O in different topographic areas is the greatest.Overall,the reuse of straw and manure can supplement the nutrient needs of farmland,but it cannot completely replace the use of fertilizers except in hilly areas.The planting and breeding structure in hilly areas can provide significant reference value for future industrial adjustments in va-rious regions.关键词
结构差异/利用潜力/作物秸秆/人畜禽粪/结构差异指数/不同地形区域Key words
structural differences/substitution potential/crop straw/human-livestock-poultry manure/structural differ-ence index/different topographical regions分类
农业科技引用本文复制引用
陈磊,夏小林,张靖雨,汪邦稳,龙昶宇..不同地形区秸秆和粪尿的养分结构差异及替减化肥潜力分析:以安徽省为例[J].生态与农村环境学报,2024,40(8):1006-1016,11.基金项目
安徽省自然科学基金(2208085US10,2208085US21) （2208085US10,2208085US21）
安徽省(水利部淮河水利委员会)水利科学研究院青年创新计划项目(KY202201) （水利部淮河水利委员会）
