Details
| Original language | English |
|---|---|
| Article number | 589 |
| Journal | Agronomy |
| Volume | 15 |
| Issue number | 3 |
| Publication status | Published - 27 Feb 2025 |
Abstract
The effect of biochar addition on enzyme stoichiometry and regulatory mechanisms in saline-alkali soil is still vague. We studied how five years (2018–2023) of applying 10 t biochar ha−1 yr−1 influences soil’s chemical and microbial properties, microbial element utilization efficiency, and resource limitations in the Tarim River basin. Low, medium, and high nitrogen fertilization (kg N ha−1) and irrigation (W) (mm) with or without biochar (B) were as follows: low nitrogen low irrigation (LNLW, 100/140), mid nitrogen mid irrigation (MNMW, 200/220), high nitrogen high irrigation (HNHW, 300/320), LNLWB, MNMWB, and HNHWB. Biochar application (LNLWB, MNMWB, HNHWB) increased soil organic carbon (+61%, +55%, +59%), total N (+9%, +16%, +8%), total phosphorus (+6%, +5%, +27%), microbial N (+75%, +86%, +28%) and P use efficiency (+60%, +45%, +27%), but decreased microbial biomass carbon (−6%, −29%, −45%), and microbial carbon use efficiency (−6%, −7%, −7%). Biochar application alleviated microbial C limitation but increased the P limitation of MNMW and the N limitation of HNHW. In conclusion, with a 1/3 reduction in N fertilization and irrigation compared with HNHW (MNMW), biochar can greatly alleviate microbial resource limitations and improve soil fertility in saline-alkaline soils.
Keywords
- biochar, microbial element utilization efficiency, microbial resource limitation, phospholipid fatty acids, soil enzymatic activities
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Agronomy and Crop Science
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Agronomy, Vol. 15, No. 3, 589, 27.02.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Enzymatic Stoichiometry and Microbial Resource Limitation in a Saline-Alkaline Soil Five Years After Biochar Application, Fertilization, and Irrigation
AU - Li, Jingjing
AU - Liang, Yinku
AU - Xue, Lihua
AU - Li, Wenwen
AU - Zhang, Sheng
AU - Zamanian, Kazem
AU - Zhao, Xiaoning
N1 - Publisher Copyright: © 2025 by the authors.
PY - 2025/2/27
Y1 - 2025/2/27
N2 - The effect of biochar addition on enzyme stoichiometry and regulatory mechanisms in saline-alkali soil is still vague. We studied how five years (2018–2023) of applying 10 t biochar ha−1 yr−1 influences soil’s chemical and microbial properties, microbial element utilization efficiency, and resource limitations in the Tarim River basin. Low, medium, and high nitrogen fertilization (kg N ha−1) and irrigation (W) (mm) with or without biochar (B) were as follows: low nitrogen low irrigation (LNLW, 100/140), mid nitrogen mid irrigation (MNMW, 200/220), high nitrogen high irrigation (HNHW, 300/320), LNLWB, MNMWB, and HNHWB. Biochar application (LNLWB, MNMWB, HNHWB) increased soil organic carbon (+61%, +55%, +59%), total N (+9%, +16%, +8%), total phosphorus (+6%, +5%, +27%), microbial N (+75%, +86%, +28%) and P use efficiency (+60%, +45%, +27%), but decreased microbial biomass carbon (−6%, −29%, −45%), and microbial carbon use efficiency (−6%, −7%, −7%). Biochar application alleviated microbial C limitation but increased the P limitation of MNMW and the N limitation of HNHW. In conclusion, with a 1/3 reduction in N fertilization and irrigation compared with HNHW (MNMW), biochar can greatly alleviate microbial resource limitations and improve soil fertility in saline-alkaline soils.
AB - The effect of biochar addition on enzyme stoichiometry and regulatory mechanisms in saline-alkali soil is still vague. We studied how five years (2018–2023) of applying 10 t biochar ha−1 yr−1 influences soil’s chemical and microbial properties, microbial element utilization efficiency, and resource limitations in the Tarim River basin. Low, medium, and high nitrogen fertilization (kg N ha−1) and irrigation (W) (mm) with or without biochar (B) were as follows: low nitrogen low irrigation (LNLW, 100/140), mid nitrogen mid irrigation (MNMW, 200/220), high nitrogen high irrigation (HNHW, 300/320), LNLWB, MNMWB, and HNHWB. Biochar application (LNLWB, MNMWB, HNHWB) increased soil organic carbon (+61%, +55%, +59%), total N (+9%, +16%, +8%), total phosphorus (+6%, +5%, +27%), microbial N (+75%, +86%, +28%) and P use efficiency (+60%, +45%, +27%), but decreased microbial biomass carbon (−6%, −29%, −45%), and microbial carbon use efficiency (−6%, −7%, −7%). Biochar application alleviated microbial C limitation but increased the P limitation of MNMW and the N limitation of HNHW. In conclusion, with a 1/3 reduction in N fertilization and irrigation compared with HNHW (MNMW), biochar can greatly alleviate microbial resource limitations and improve soil fertility in saline-alkaline soils.
KW - biochar
KW - microbial element utilization efficiency
KW - microbial resource limitation
KW - phospholipid fatty acids
KW - soil enzymatic activities
UR - http://www.scopus.com/inward/record.url?scp=105000964543&partnerID=8YFLogxK
U2 - 10.3390/agronomy15030589
DO - 10.3390/agronomy15030589
M3 - Article
AN - SCOPUS:105000964543
VL - 15
JO - Agronomy
JF - Agronomy
SN - 2073-4395
IS - 3
M1 - 589
ER -