Impacts of Biochar Application on Inorganic Phosphorus Fractions in Agricultural Soils
Inorganic phosphorus (P) is a key component of soil P pools, influencing their availability and mobility. Although studies on biochar’s effect on inorganic P fractions in various soils are growing, a critical review of these findings is lacking. Herein, we conducted a quantitative meta-analysis of 7...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-01-01
|
| Series: | Agriculture |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-0472/15/1/103 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841549510084395008 |
|---|---|
| author | Liwen Lin Yutao Peng Lin Zhou Baige Zhang Qing Chen Hao Chen |
| author_facet | Liwen Lin Yutao Peng Lin Zhou Baige Zhang Qing Chen Hao Chen |
| author_sort | Liwen Lin |
| collection | DOAJ |
| description | Inorganic phosphorus (P) is a key component of soil P pools, influencing their availability and mobility. Although studies on biochar’s effect on inorganic P fractions in various soils are growing, a critical review of these findings is lacking. Herein, we conducted a quantitative meta-analysis of 74 peer-reviewed datasets, drawing general conclusions and confirming the absence of publication bias through funnel plot statistics. The results showed that biochars can influence soil inorganic P fractions, with their effects depending on biochar (i.e., feedstock, pyrolysis temperature and time, C:N ratio, pH, ash and P content) and soil-related properties (i.e., pH, texture, P content). Specifically, the addition of biochar significantly enhanced the diverse soil inorganic P fractions and P availability (as indicated by Olsen-P). Only biochars produced from wood residues and having high C/N ratios (>200) did not significantly increase the labile P fractions (water extracted soil phosphorus (H<sub>2</sub>O-P), Olsen-P, and soil calcium compounds bound phosphorus (Ca<sub>2</sub>-P)). The application of biochars derived from crop residues significantly increased the soil P associated with iron and aluminum oxides, while there was no significant effect on manure- and wood residue-derived biochars. In addition, applications of low temperature biochars and manure residue-derived biochars could increase the proportions of soil highly stable P. We identified knowledge gaps in biochar production and its potential for soil phosphorus regulation. Due to the complex processes by which biochar affects soils, more systematic evaluations and predictive methods (e.g., modeling, machine learning) are needed to support sustainable agriculture and environmental practices. |
| format | Article |
| id | doaj-art-737fae70a1064755884822692b3976f4 |
| institution | Kabale University |
| issn | 2077-0472 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agriculture |
| spelling | doaj-art-737fae70a1064755884822692b3976f42025-01-10T13:13:43ZengMDPI AGAgriculture2077-04722025-01-0115110310.3390/agriculture15010103Impacts of Biochar Application on Inorganic Phosphorus Fractions in Agricultural SoilsLiwen Lin0Yutao Peng1Lin Zhou2Baige Zhang3Qing Chen4Hao Chen5School of Agriculture and Biotechnology, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, ChinaSchool of Agriculture and Biotechnology, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, ChinaBeijing Key Laboratory of Farmyard Soil Pollution Prevention-Control and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, ChinaVegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, ChinaBeijing Key Laboratory of Farmyard Soil Pollution Prevention-Control and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, ChinaSchool of Agriculture and Biotechnology, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, ChinaInorganic phosphorus (P) is a key component of soil P pools, influencing their availability and mobility. Although studies on biochar’s effect on inorganic P fractions in various soils are growing, a critical review of these findings is lacking. Herein, we conducted a quantitative meta-analysis of 74 peer-reviewed datasets, drawing general conclusions and confirming the absence of publication bias through funnel plot statistics. The results showed that biochars can influence soil inorganic P fractions, with their effects depending on biochar (i.e., feedstock, pyrolysis temperature and time, C:N ratio, pH, ash and P content) and soil-related properties (i.e., pH, texture, P content). Specifically, the addition of biochar significantly enhanced the diverse soil inorganic P fractions and P availability (as indicated by Olsen-P). Only biochars produced from wood residues and having high C/N ratios (>200) did not significantly increase the labile P fractions (water extracted soil phosphorus (H<sub>2</sub>O-P), Olsen-P, and soil calcium compounds bound phosphorus (Ca<sub>2</sub>-P)). The application of biochars derived from crop residues significantly increased the soil P associated with iron and aluminum oxides, while there was no significant effect on manure- and wood residue-derived biochars. In addition, applications of low temperature biochars and manure residue-derived biochars could increase the proportions of soil highly stable P. We identified knowledge gaps in biochar production and its potential for soil phosphorus regulation. Due to the complex processes by which biochar affects soils, more systematic evaluations and predictive methods (e.g., modeling, machine learning) are needed to support sustainable agriculture and environmental practices.https://www.mdpi.com/2077-0472/15/1/103soil phosphorus formbiochar propertiesquantative analysissoil texturephosphorus availability |
| spellingShingle | Liwen Lin Yutao Peng Lin Zhou Baige Zhang Qing Chen Hao Chen Impacts of Biochar Application on Inorganic Phosphorus Fractions in Agricultural Soils Agriculture soil phosphorus form biochar properties quantative analysis soil texture phosphorus availability |
| title | Impacts of Biochar Application on Inorganic Phosphorus Fractions in Agricultural Soils |
| title_full | Impacts of Biochar Application on Inorganic Phosphorus Fractions in Agricultural Soils |
| title_fullStr | Impacts of Biochar Application on Inorganic Phosphorus Fractions in Agricultural Soils |
| title_full_unstemmed | Impacts of Biochar Application on Inorganic Phosphorus Fractions in Agricultural Soils |
| title_short | Impacts of Biochar Application on Inorganic Phosphorus Fractions in Agricultural Soils |
| title_sort | impacts of biochar application on inorganic phosphorus fractions in agricultural soils |
| topic | soil phosphorus form biochar properties quantative analysis soil texture phosphorus availability |
| url | https://www.mdpi.com/2077-0472/15/1/103 |
| work_keys_str_mv | AT liwenlin impactsofbiocharapplicationoninorganicphosphorusfractionsinagriculturalsoils AT yutaopeng impactsofbiocharapplicationoninorganicphosphorusfractionsinagriculturalsoils AT linzhou impactsofbiocharapplicationoninorganicphosphorusfractionsinagriculturalsoils AT baigezhang impactsofbiocharapplicationoninorganicphosphorusfractionsinagriculturalsoils AT qingchen impactsofbiocharapplicationoninorganicphosphorusfractionsinagriculturalsoils AT haochen impactsofbiocharapplicationoninorganicphosphorusfractionsinagriculturalsoils |