Details
| Original language | English |
|---|---|
| Article number | 104844 |
| Journal | Applied soil ecology |
| Volume | 186 |
| Early online date | 20 Feb 2023 |
| Publication status | Published - Jun 2023 |
Abstract
Increasing evidence shows that fertilization plays a key role in improving nitrogen (N) storage and increasing N supply capacity in paddy soils. How fertilizer regimes (N application rate, substitution rate, and fertilizer type) and environmental variables (soil pH and SOM) affect N pools, nitrification processes (abundance of nitrifying microorganisms, nitrification rate), and N losses (NH3 volatilization and N2O emission) in paddy soils is still unclear. Here, we conducted a meta-analysis by compiling a total of 1307 individual experimental observations from 64 peer-reviewed publications to evaluate the impacts of N fertilization with other amendments (manure, biochar, or nitrification inhibitors) on the abovementioned paddy soil N sequestration and turnover. Overall, fertilization increased N pools (total N, NH4+-N, and NO3−-N content) and the abundance of main nitrifying microorganisms (AOA and AOB) by 7.3 % to 51.4 % and 70.3 % to 146.9 % in paddy soil, respectively, while stimulating NH3 volatilization and N2O emissions by 277.3 % and 149.7 %, respectively. The increased N losses following fertilization were positively correlated with the expansion of paddy soil N pools. In particular, the substitution of organic fertilizer for chemical fertilizer at 30 % to 70 % had a better effect on elevating soil N sequestration, while a substitution rate of >70 % reduced N losses. Moreover, the application of biochar and nitrification inhibitors was conducive to increasing total N, NH4+-N, and NH3 volatilization and reducing N2O emissions in fertilized paddy soils. Our findings indicated that fertilization regimes substantially stimulated N pools and N losses in paddy ecosystems. Thus, to avoid environmental and economic consequences, the optimization of N management and adjusting soil properties should be considered to increase N use efficiency and suppress N losses.
Keywords
- Fertilization, Nitrification, Nitrogen losses, Paddy, Soil nitrogen pools, Soil pH
ASJC Scopus subject areas
- Environmental Science(all)
- Ecology
- Agricultural and Biological Sciences(all)
- Agricultural and Biological Sciences (miscellaneous)
- Agricultural and Biological Sciences(all)
- Soil Science
Sustainable Development Goals
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In: Applied soil ecology, Vol. 186, 104844, 06.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Fertilization regimes and the nitrification process in paddy soils
T2 - Lessons for agricultural sustainability from a meta-analysis
AU - Meng, Xiangtian
AU - Yu, Haiyang
AU - Zhang, Xuechen
AU - Li, Yaying
AU - Zamanien, Kazem
AU - Yao, Huaiying
N1 - Funding Information: This work was supported by the National Natural Science Foundation of China ( 42077036 , 42021005 ), the National Key R & D Program of China ( 2020YFC1806900 ), and Ningbo Municipal Science and Technology Bureau ( 202002N3079 ). Sincere thanks go to the anonymous reviewers and editors for helping us strengthen our manuscript.
PY - 2023/6
Y1 - 2023/6
N2 - Increasing evidence shows that fertilization plays a key role in improving nitrogen (N) storage and increasing N supply capacity in paddy soils. How fertilizer regimes (N application rate, substitution rate, and fertilizer type) and environmental variables (soil pH and SOM) affect N pools, nitrification processes (abundance of nitrifying microorganisms, nitrification rate), and N losses (NH3 volatilization and N2O emission) in paddy soils is still unclear. Here, we conducted a meta-analysis by compiling a total of 1307 individual experimental observations from 64 peer-reviewed publications to evaluate the impacts of N fertilization with other amendments (manure, biochar, or nitrification inhibitors) on the abovementioned paddy soil N sequestration and turnover. Overall, fertilization increased N pools (total N, NH4+-N, and NO3−-N content) and the abundance of main nitrifying microorganisms (AOA and AOB) by 7.3 % to 51.4 % and 70.3 % to 146.9 % in paddy soil, respectively, while stimulating NH3 volatilization and N2O emissions by 277.3 % and 149.7 %, respectively. The increased N losses following fertilization were positively correlated with the expansion of paddy soil N pools. In particular, the substitution of organic fertilizer for chemical fertilizer at 30 % to 70 % had a better effect on elevating soil N sequestration, while a substitution rate of >70 % reduced N losses. Moreover, the application of biochar and nitrification inhibitors was conducive to increasing total N, NH4+-N, and NH3 volatilization and reducing N2O emissions in fertilized paddy soils. Our findings indicated that fertilization regimes substantially stimulated N pools and N losses in paddy ecosystems. Thus, to avoid environmental and economic consequences, the optimization of N management and adjusting soil properties should be considered to increase N use efficiency and suppress N losses.
AB - Increasing evidence shows that fertilization plays a key role in improving nitrogen (N) storage and increasing N supply capacity in paddy soils. How fertilizer regimes (N application rate, substitution rate, and fertilizer type) and environmental variables (soil pH and SOM) affect N pools, nitrification processes (abundance of nitrifying microorganisms, nitrification rate), and N losses (NH3 volatilization and N2O emission) in paddy soils is still unclear. Here, we conducted a meta-analysis by compiling a total of 1307 individual experimental observations from 64 peer-reviewed publications to evaluate the impacts of N fertilization with other amendments (manure, biochar, or nitrification inhibitors) on the abovementioned paddy soil N sequestration and turnover. Overall, fertilization increased N pools (total N, NH4+-N, and NO3−-N content) and the abundance of main nitrifying microorganisms (AOA and AOB) by 7.3 % to 51.4 % and 70.3 % to 146.9 % in paddy soil, respectively, while stimulating NH3 volatilization and N2O emissions by 277.3 % and 149.7 %, respectively. The increased N losses following fertilization were positively correlated with the expansion of paddy soil N pools. In particular, the substitution of organic fertilizer for chemical fertilizer at 30 % to 70 % had a better effect on elevating soil N sequestration, while a substitution rate of >70 % reduced N losses. Moreover, the application of biochar and nitrification inhibitors was conducive to increasing total N, NH4+-N, and NH3 volatilization and reducing N2O emissions in fertilized paddy soils. Our findings indicated that fertilization regimes substantially stimulated N pools and N losses in paddy ecosystems. Thus, to avoid environmental and economic consequences, the optimization of N management and adjusting soil properties should be considered to increase N use efficiency and suppress N losses.
KW - Fertilization
KW - Nitrification
KW - Nitrogen losses
KW - Paddy
KW - Soil nitrogen pools
KW - Soil pH
UR - http://www.scopus.com/inward/record.url?scp=85148617800&partnerID=8YFLogxK
U2 - 10.1016/j.apsoil.2023.104844
DO - 10.1016/j.apsoil.2023.104844
M3 - Article
AN - SCOPUS:85148617800
VL - 186
JO - Applied soil ecology
JF - Applied soil ecology
SN - 0929-1393
M1 - 104844
ER -