Chen Binhui, Gu Baojing, Zhang Xiuming, Cheng Luxi, Wang Chen, Dong Hongmin, Ros Gerard H, de Vries Wim, Wang Mengru
State Key Laboratory of Soil Pollution Control and Safety, Zhejiang University, Hangzhou, 310058, China; College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China; Policy Simulation Laboratory, Zhejiang University, Hangzhou, 310058, China.
State Key Laboratory of Soil Pollution Control and Safety, Zhejiang University, Hangzhou, 310058, China; College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China.
J Environ Manage. 2025 Apr;380:125075. doi: 10.1016/j.jenvman.2025.125075. Epub 2025 Mar 26.
As the world's largest livestock producer, China faces pressing challenges in recycling manure to minimize resource waste and environmental degradation resulting from the vast amounts of manure generated. Understanding the drivering forces behind manure recycling is essential for advancing sustainable agriculture in China. This study estimated the manure recycling ratio (MRR), measured by nitrogen content, across 2853 Chinese counties using data from 390,000 farms representing four major livestock farming types in 2017. Northern Chinese counties demonstrated significantly higher MRRs, with values exceeding 50 %, compared to Southern regions, with values being lower than 30 %. Higher MRRs were linked to larger cropland size, higher urbanization levels, and a greater proportion of chicken farming. In contrast, MRRs declined in regions with higher temperatures, increased precipitation, higher manure production per livestock unit, a greater emphasis on pig farming, and an ageing rural population. Notably, natural factors such as temperature and precipitation predominantly influenced MRRs in both Southern and Northern China, whereas socioeconomic factors like cropland size and urbanization were more impactful in Eastern and Southwestern regions. These findings highlight the need for region-specific strategies that account for natural and socioeconomic conditions to enhance manure recycling practices across China.
作为世界上最大的畜牧生产国，中国在粪便回收利用方面面临着紧迫的挑战，即尽量减少因产生大量粪便而导致的资源浪费和环境退化。了解粪便回收背后的驱动因素对于推动中国可持续农业发展至关重要。本研究利用2017年来自代表四种主要畜牧养殖类型的39万个农场的数据，估算了中国2853个县以氮含量衡量的粪便回收率（MRR）。与南方地区（回收率低于30%）相比，中国北方各县的MRR显著更高，超过50%。较高的MRR与更大的农田面积、更高的城市化水平以及更大比例的养鸡业有关。相比之下，在气温较高、降水量增加、每牲畜单位粪便产量较高、更注重养猪业以及农村人口老龄化的地区，MRR有所下降。值得注意的是，温度和降水等自然因素在中国南方和北方都对MRR产生了主要影响，而农田面积和城市化等社会经济因素在东部和西南部地区的影响更大。这些发现凸显了需要制定因地制宜的策略，综合考虑自然和社会经济条件，以加强中国各地的粪便回收利用实践。
