农林管理在增强森林碳固存和缓解气候变化方面具有巨大潜力。然而,复合施肥率对农林系统碳汇的影响和响应机制仍然不明确。本研究旨在阐明不同复混肥用量对土壤温室气体(GHG)排放的影响,植被和土壤有机碳(SOC)汇,并通过对12个地块进行为期一年的定位测试来说明农林系统碳汇的差异,施用不同的复合肥施用量(0(CK),400(A1),800(A2),和1600(A3)kgha-1)。研究表明,受精后,A1的温室气体排放总量下降了4.41%,而A2和A3的温室气体排放总量增加了17.13%和72.23%,分别。A1、A2和A3的植被固碳增加了18.04%,26.75%,和28.65%,分别,土壤有机碳固存增加了32.57%,42.27%和43.29%,分别。总而言之,与CK相比,生态系统碳固存增加了54.41%,51.67%,和0.90%,分别。我们的研究表明,合理的施肥可以改善生态系统的碳汇,并有效地改善气候变化。
Agroforestry management has immense potential in enhancing forest carbon sequestration and mitigating climate change. Yet the impact and response mechanism of compound fertilization rates on carbon sinks in agroforestry systems remain ambiguous. This study aims to elucidate the impact of different compound fertilizer rates on soil greenhouse gas (GHG) emissions, vegetation and soil organic carbon (SOC) sinks, and to illustrate the differences in agroforestry systems\' carbon sinks through a one-year positioning test across 12 plots, applying different compound fertilizer application rates (0 (CK), 400 (A1), 800 (A2), and 1600 (A3) kg ha-1). The study demonstrated that, after fertilization, the total GHG emissions of A1 decreased by 4.41%, whereas A2 and A3 increased their total GHG emissions by 17.13% and 72.23%, respectively. The vegetation carbon sequestration of A1, A2, and A3 increased by 18.04%, 26.75%, and 28.65%, respectively, and the soil organic carbon sequestration rose by 32.57%, 42.27% and 43.29%, respectively. To sum up, in contrast with CK, the ecosystem carbon sequestration climbed by 54.41%, 51.67%, and 0.90%, respectively. Our study suggests that rational fertilization can improve the carbon sink of the ecosystem and effectively ameliorate climate change.