County distribution characteristics and resource utilization potential of straw and livestock manure in Sichuan Province

• Published in: Journal of agricultural resources and environment Vol. 40; no. 2; p. 455
• Main Authors: Wang, Yue, Li, Lan, Kuang Fuhong
• Format: Journal Article
• Language: Chinese
• Published: Tianjin Journal of Agricultural Resources and Environment (JARE) 01.01.2023
• Subjects: Agricultural resources; Agricultural wastes; Animal wastes; Biogas; Corn; Crop production; Crop yield; Distribution patterns; Energy utilization; Fertilizer application; Fertilizers; Livestock; Manures; Nitrogen; Phosphorus; Pig manure; Potash; Potassium; Potassium carbonate; Poultry; Poultry manure; Rapeseed; Recycling; Resource utilization; Rice; Sheep; Spatial analysis; Straw; Swine; Wheat; China; Sichuan China
• ISSN: 2095-6819; 2095-6819
• DOI: 10.13254/j.jare.2022.0072

为明晰四川省近年秸秆和畜禽粪便分布格局和特征，基于2018年四川省县域尺度主要粮油作物产量和畜禽出栏量，通过空间分析明确四川主要粮油作物秸秆（水稻、小麦、玉米、油菜）和畜禽粪便（牛、羊、猪、家禽）资源分布状况及聚集区，探讨各县秸秆和畜禽粪便循环利用潜力和途径。结果表明：四川省2018年秸秆可收集总量为2 808.55万t，呈现“一个中心，东密西疏”的分布规律，秸秆种类以玉米和水稻秸秆为主；畜禽粪便总量为8 162.02万t，呈现“三个中心，外密内疏”的分布规律，猪粪占绝对优势，占比高达57.8%。2018年四川省秸秆肥料化理论上可节约当年全省7.4%氮肥和5.0%磷肥投入，可全量替代当年全省钾肥用量，秸秆能源化可替代1 422.71万t标准煤或6.22×109 m3沼气。2018年四川省畜禽粪便全部肥料化可节约当年全省42.6%氮肥投入，可全量替代当年全省磷肥和钾肥用量，畜禽粪便能源化利用可折算成835.19万t标准煤或4.15×109 m3沼气。99%、95%和90%置信区间秸秆热点县分别有30、40个和48个，秸秆量占全省秸秆总量比例分别达39.4%、49.5%和56.3%； 99%、95%和90%置信区间畜禽粪便热点县分别有23、31个和37个，畜禽粪便量占全省畜禽粪便总量比例分别达24.4%、33.9%和38.8%。研究表明，成都平原及川东丘陵区域是近年四川秸秆和畜禽粪便资源富集和循环利用重点区域，纯秸秆或纯粪便热点县选择利用模式时可以有各自的侧重点，21个秸秆-畜禽粪便双热点县可着重考虑种养结合模式，推行多层次、多元化利用格局。To clarify the distribution pattern and characteristics of straw and livestock manure in Sichuan Province in recent years and provide a scientific basis for the resource utilization of agricultural waste in Sichuan Province, this study discusses the potential and ways of recycling straw and livestock manure in each county and uses spatial ana