College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, PR China.
College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, PR China.
Sci Total Environ. 2022 Apr 15;817:153020. doi: 10.1016/j.scitotenv.2022.153020. Epub 2022 Jan 10.
Pig manure (PM), wheat straw (WS), compost product (CP) and improved compost product (IC) are very important agricultural organic resources. In this study, their applicability as soil organic fertilizations (OFs) in terms of their properties and influence on soil properties through an incubation experiment and a field verification were evaluated. The property differences indicated that wheat straw has the highest C/N ratio, and compost products contain more aromatic compounds compared with pig manure and wheat straw. The results of incubation experiment showed that OFs promoted the carbon and nitrogen transformation driven by related microorganisms and their functional metabolisms. The PM treatment had the highest proportion of Labile organic carbon to soil organic carbon (LOC/SOC) and ratio of dissolved organic carbon to soil organic carbon (DOC/SOC), while WS treatment had the lowest values. The highest net N mineralization rate and nitrification rate was observed in the WS treatment, but the lowest amounts were under the PM treatment. Additionally, the similar findings were also obtained from the field examination. Therefore, compost products were more applicable in agricultural soil as OF insight from changes in carbon, nitrogen and microbial community. Furthermore, the result of UV-vision showed that the largest amount of aromatic structure was observed in IC relative to CP. It can be concluded that CP was more conducive to fix carbon and provide available nitrogen for crops among four OFs.
猪粪（PM）、小麦秸秆（WS）、堆肥产品（CP）和改良堆肥产品（IC）是非常重要的农业有机资源。本研究通过培养实验和田间验证，评估了它们作为土壤有机肥料（OFs）的适用性，包括其性质及其对土壤性质的影响。性质差异表明，小麦秸秆的 C/N 比最高，而堆肥产品与猪粪和小麦秸秆相比，含有更多的芳香族化合物。培养实验结果表明，OFs 促进了相关微生物及其功能代谢驱动的碳氮转化。PM 处理的土壤有机碳中易分解有机碳比例（LOC/SOC）和溶解有机碳与土壤有机碳比例（DOC/SOC）最高，而 WS 处理的比例最低。WS 处理的净氮矿化率和硝化率最高，但 PM 处理的氮矿化率和硝化率最低。此外，田间检查也得到了类似的发现。因此，从碳、氮和微生物群落的变化来看，堆肥产品在农业土壤中作为 OF 的应用更为广泛。此外，UV 可见光谱的结果表明，IC 中芳香结构的含量相对 CP 最大。可以得出结论，在这四种 OFs 中，CP 更有利于固定碳并为作物提供有效氮。
