Impact of straw return combined with different fertilizations on soil organic carbon stock in upland wheat and maize croplands in China: A meta-analysis

被引:14
作者
Islam, Mahbub U. I. [1 ,2 ,3 ]
Jiang, Fahui [1 ,4 ]
Halder, Milton [1 ,2 ,5 ]
Liu, Shuai [1 ]
Peng, Xinhua [1 ,2 ]
机构
[1] Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100081, Peoples R China
[3] Bangladesh Agr Res Inst, Gazipur 1701, Bangladesh
[4] Jiangxi Agr Univ, Nanchang 330045, Peoples R China
[5] Khulna Univ, Soil Water & Environm Discipline, Khulna 9208, Bangladesh
来源
CROP AND ENVIRONMENT | 2023年 / 2卷 / 04期
基金
中国国家自然科学基金;
关键词
Carbon sequestration; Fertilizer practice; Soil organic carbon; Straw return; Wheat-maize cropping system; LONG-TERM FERTILIZATION; CROP YIELD; NITROGEN; MATTER; DYNAMICS; STABILIZATION; STOICHIOMETRY; MECHANISMS; SATURATION; MANAGEMENT;
D O I
10.1016/j.crope.2023.10.003
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Straw return is a vital soil amendment practice in Chinese upland soils, aiming to improve the soil organic carbon (SOC) stock. However, its impact on SOC stock depends on various fertilizer practices, leading to inconclusive results. To address this, we conducted a meta-analysis of 121 peer-reviewed publications to evaluate the effect of straw return combined with different fertilization practices including balanced NPK (BFS), unbalanced NP, NK, PK, or N fertilization (UFS), and no fertilization (NFS) in the wheat-maize cropping system. The results showed that straw return with BFS led to the highest increase in SOC stock (13.3%), followed by UFS (11.4%) and NFS (6.12%), compared to straw removal under the same fertilization conditions. BFS also significantly increased the soil C (15.9%), N (9.62%), and P (6.21%) contents, as well as the C:N (2.48%) and C:P (11.4%) ratios. In contrast, UFS resulted in higher C:N ratios (6.47%) and soil acidification, affecting the SOC stock during straw return. A structural equation model revealed that the presence of BFS positively influenced the association between SOC stock and soil stoichiometry (P < 0.05) compared to UFS, which was influenced by climate and initial soil properties. Additionally, the impact of BFS on SOC stock was more significant in the double cropping system (14.5%) than in the single wheat (8.32%) and single maize (10.8%) cropping systems. A lower initial SOC (<6 g kg(-1)) also showed a greater response to BFS compared to a higher initial SOC (>12 g kg(-1)). Based on C sequestration efficiency, implementing straw return with BFS could lead to a higher rate of increase in SOC sequestration.
引用
收藏
页码:233 / 241
页数:9
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