数字农科院2.0

Long-Term Organic Substitution Regimes Affect Open-Field Vegetable Yields and Soil Organic Carbon Stability by Regulating Soil Labile Organic Carbon Fractions’ Changes

文献类型： 外文期刊

作者： Yaling Wang;Linxuan Wang;Ruonan Li;He Wang;Guohan Wu;Xinyue Wen;Shaowen Huang;Xiubin Wang;Chunjing Liu

作者机构：

关键词： carbon pool management index;labile organic carbon fractions;long-term organic substitution;open-field vegetables;soil organic carbon stability

期刊名称： Agronomy

ISSN： 2073-4395

年卷期： 2025 年 15 卷 2 期

页码：

收录情况： SCIE（2025版）

摘要： Soil labile organic carbon (C) fractions play a key role in agricultural soil fertility. However, the effects of long-term organic substitution regimes on soil organic carbon (SOC), its labile fractions, stability, and vegetable yields as well as the relationships among these factors in the open-field are less well-studied. Hence, the objective of this study was to analyze the effects of long-term organic substitution regimes on SOC sequestration, labile C fractions [particulate organic C (POC), microbial biomass carbon (MBC), dissolved organic C (DOC), and readily oxidizable C (ROC)], SOC stability, the C pool management index (CMI), and vegetable yields in a long-term (13 years) open-field experiment. Five treatments were examined: 100% chemical nitrogen fertilizer (CN), substituting 25% of the chemical N with manure (MN) or straw (SN), and substituting 50% of the chemical N with manure (2MN) or manure plus straw (MSN). Compared to the CN, organic substitution treatments increased the average yields of vegetable, the SOC, the labile C fractions’ contents, and the C pool management index (CMI) to varying degrees, but only MSN reached significant levels for these factors. However, the MSN treatment had a significantly lower C stability index (SI) than the CN. 13C-NMR analyses also confirmed that organic substitution treatments increased the proportion of O-alkyl C and the OA/A, but reduced SOC stability. Pearson correlation analysis and the partial least squares path model indicated that labile C fractions were the mainly direct contributors to yield and SOC stability. Overall, substituting 50% of the chemical N with manure plus straw is a relatively ideal fertilization practice to improve vegetable yields and enhance C activity in an open field.

分类号：

  • 相关文献

[1]Soil organic carbon trade-offs under conservation tillage: Carbon stock versus stability mediated by particulate and mineral-associated fractions. Rui Jiang,Shuai Liu,Fahui Jiang,Zichun Guo,Samuel Adingo,Zengming Chen,Lei Gao,Xinhua Peng. 2025

[2]Study on the Effects of Reducing Nitrogen Fertilizer: Stabilizing Yield and Carbon Sequestration by Synergistic Utilization of Chinese Milk Vetch and Rice Straw in Double-Cropping Rice Area. Xue Xie,Yulin Liao,Yanhong Lu,Jianglin Zhang,Peng Li,Youyun Tang,Weidong Cao,Yajie Gao,Jun Nie. 2024

[3]Can soil organic carbon sequestration and the carbon management index be improved by changing the film mulching methods in the semiarid region?. Jialin Yang,Liangqi Ren,Nanhai Zhang,Enke Liu,Shikun Sun,Xiaolong Ren,Zhikuan Jia,Ting Wei,Peng Zhang. 2024

作者其他论文 更多>>