Soil nitrogen and carbon storages and carbon pool management index under sustainable conservation tillage strategy

作者：Jianyu Yuan, Yunliang Liang, Macao Zhuo, Mahran Sadiq, Li Liu, Jiangqi Wu, Guorong Xu, Shuainan Liu, Guang Li, Lijuan Yan · 发表于：Frontiers in Ecology and Evolution · 年份：2023 · DOI：10.3389/fevo.2022.1082624 · 被引用次数：28 · 研究领域：Soil Carbon and Nitrogen Dynamics、Soil and Unsaturated Flow、Climate change and permafrost

Agricultural practices are significant to increase the soil nitrogen and organic carbon sequestration to adapt and mitigate the climate change in a recent climate change scenario. With this background, we carried out research in the Longzhong Loess Plateau region of China. This research was conducted under a randomized complete block design, with three replicates. Adopt the method of combining outdoor positioning field test with indoor index measurement to explore the soil bulk density (BD), nitrogen components ( viz., nitrate nitrogen (NO 3 − -N), ammonia nitrogen (NH 4 + -N), total nitrogen (TN), microbial biomass nitrogen (MBN) and nitrogen storage (NS), and carbon components [ viz., soil organic carbon (SOC), easily oxidized organic carbon (EOC), microbial biomass carbon (MBC) and carbon storage (CS), carbon pool index (CPI), carbon pool activity (A) and carbon pool activity index (AI) and carbon pool management index (CPMI)] and C/N, ratio under different tillage practices [ namely., conventional tillage (CT), no tillage (NT), straw mulch with conventional tillage (CTS) and straw mulch with no tillage (NTS)]. Our results depicted that different conservation tillage systems significantly increased soil BD over conventional tillage. Compared with CT, the NTS, CTS and NT reduced soil NO 3 − -N, increased the soil NH 4 + -N, TN, MBN and NS, among them, NS under NTS, CTS and NT treatment was 25.0, 14.8 and 13.1% higher than that under CT treatment, respectively. Additionally,...