湖南蓝山：猪粪变身“金肥料” 循环农业拓宽致富路

Core Viewpoint - The article highlights the successful transformation of pig manure into organic fertilizer in Hunan's Lanshan County, showcasing a model of circular agriculture that enhances farmers' income and promotes sustainable farming practices [1][3]. Group 1: Economic Impact - A farmer, Tang Xibo, reported a profit of approximately 150,000 yuan from sweet potato cultivation using organic fertilizer derived from pig manure, while his pig farm generated a profit of 210,000 yuan [1][3]. - The cost of processing 1 ton of pig manure into organic fertilizer is about 100 yuan, significantly lower than the market price of 3,750 yuan per ton for equivalent chemical fertilizers, thus reducing planting costs [3]. Group 2: Agricultural Practices - The integration of livestock and crop farming has led to a reduction in the defect rate of sweet potatoes from 30% to 20%, increasing demand from customers [1][3]. - The use of agricultural by-products, such as sweet potato stalks and leftover materials from processing, as feed for pigs exemplifies an efficient internal ecological cycle [3]. Group 3: Policy Support - Lanshan County has seen 167 households engage in integrated farming, with 52 becoming dual-operation households, supported by local policies that promote circular agriculture [4]. - The county provides financial incentives, including a 40% subsidy on environmental facilities and a 30% subsidy on key equipment, to lower the barriers for farmers transitioning to sustainable practices [4].