Pedosphere 34(2): 361--373, 2024
ISSN 1002-0160/CN 32-1315/P
©2024 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Positive effects of biochar application and Rhizophagus irregularis inoculation on mycorrhizal colonization, rice seedlings and phosphorus cycling in paddy soils |
Yixuan CHEN1,2, Zhonghua WEN1,2, Jun MENG1,2 , Zunqi LIU1,2, Jialong WEI1,2, Xiyu LIU1,2, Ziyi GE1,2, Wanning DAI1,2, Li LIN1,2, Wenfu CHEN1,2 |
1 National Biochar Institute, Shenyang Agricultural University, Shenyang 110866 (China)
2 Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang 110866 (China) |
| ABSTRACT |
| Phosphorus (P) is an essential element for plant growth but is often limiting in ecosystems; therefore, improving the P fertilizer use efficiency is important. Biochar and arbuscular mycorrhizal fungi (AMF) may enhance P cycling in paddy soils that contain high content of total P but low content of available P (AP). In this study, the effects of biochar addition and Rhizophagus irregularis inoculation on the organic and inorganic P contents and phosphatase activities in paddy soils, rice seedling growth, and AMF colonization were investigated. Compared with no biochar addition, biochar addition enhanced the percentage of spore germination at day 7, hyphal length, most probable number, and mycorrhizal colonization rate of R.irregularis by 32%, 662%, 70%, and 28% on average, respectively. Biochar and R. irregularis altered soil P cycling and availability. Biochar and R. irregularis, either individually or in combination, increased soil AP content by 2%-48%. Rice seedlings treated with biochar and R. irregularis produced greater biomass, improved root morphology, and increased nutrient uptake compared with those of the control without biochar and R. irregularis. The results suggest that combined application of biochar and R. irregularis is beneficial to rice cultivation in paddy soils with high content of total P but low content of AP. |
| Key Words: arbuscular mycorrhizal fungi,available P,phosphorus fraction,rice husk biochar,seedling growth,spore germination |
| Citation: Chen Y X, Wen Z H, Meng J, Liu Z Q, Wei J L, Liu X Y, Ge Z Y, Dai W N, Lin L, Chen W F. 2024. Positive effects of biochar application and Rhizophagus irregularis inoculation on mycorrhizal colonization, rice seedlings and phosphorus cycling in paddy soils. Pedosphere. 34(2): 361-373. |
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