Chen Lei, Zhang Jingyu, Xia Xiaolin, Yang Zhi, Wang Bangwen, Long Changyu
Key Laboratory of Water Conservancy and Water Resources in Anhui Province, Heifei 230088, China.
Anhui and Huaihe River Institute of Hydraulic Research, Heifei 230088, China.
Heliyon. 2023 Aug 1;9(8):e18845. doi: 10.1016/j.heliyon.2023.e18845. eCollection 2023 Aug.
Agricultural production and lifestyle are constrained by topography, causing notable under disparities in the composition, distribution, and environmental benefits of crop straw and human-livestock-poultry manure (CSHLPM) in areas with different topographic characteristics. Under the premise of the international consensus on sustainable development, it has become an objective requirement to improve the use of CSHLPM as fertilizer, and minimize the use of chemical fertilizers. Thus, an investigation was conducted to assess the difference in the quantity and composition of CSHLPM in plain, hill, and mountainous areas, taking Anhui Province of China as a case study, to evaluate the potential contribution of CSHLPM to farmland and identify the environmental benefits. The results show that the composition of CSHLPM in plain, hill, and mountainous areas varied greatly, and the reuse of CSHLPM in farmland could supplement, but not completely replace the use of chemical fertilizer to meet the needs of nutrients. In plain areas, CSHLPM did not provide the necessary amount of N and PO for crop growth, whereas in mountainous areas, PO was not available in adequate amounts for crop growth. Only in hilly areas can CSHLPM be used to completely replace chemical fertilizers and supply the necessary amounts of nutrients for crop growth. Based on the characteristics of different topographies, two constructive suggestions for improving the management strategy of CSHLPM were put forward: adjust the industrial structure of husbandry and planting, and specify the recommended ratios for mixing organic chemical fertilizers.
农业生产和生活方式受到地形的限制，导致不同地形特征地区的农作物秸秆和人畜禽粪便（CSHLPM）在组成、分布和环境效益方面存在显著差异。在国际可持续发展共识的前提下，提高CSHLPM作为肥料的利用率并尽量减少化肥使用已成为客观要求。因此，以中国安徽省为例，开展了一项调查，以评估平原、丘陵和山区CSHLPM在数量和组成上的差异，评估CSHLPM对农田的潜在贡献并确定其环境效益。结果表明，平原、丘陵和山区CSHLPM的组成差异很大，CSHLPM在农田中的再利用可以补充，但不能完全替代化肥的使用以满足养分需求。在平原地区，CSHLPM无法为作物生长提供所需的氮和磷量，而在山区，磷的量不足以满足作物生长需求。只有在丘陵地区，CSHLPM才能用于完全替代化肥并为作物生长提供所需的养分量。基于不同地形的特点，提出了两条改进CSHLPM管理策略的建设性建议：调整畜牧和种植产业结构，明确有机化肥混合的推荐比例。
