Short-Term Effect of the Addition of Rice Husk Gasification Slag on the Movement and Transformation of Phosphorus in Different Soil Types

Yuchao Bai, Jing Zhu, Baoyuan Deng, Haili Shi, Zongkang Wang, Dongfang Han, Jixian Duan and Dehan Wang
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Yuchao Bai: College of Nature Resources and Environment, South China Agricultural University, Guangzhou 510642, China
Jing Zhu: College of Nature Resources and Environment, South China Agricultural University, Guangzhou 510642, China
Baoyuan Deng: Shenzhen Batian Ecotypic Engineering Company Limited, Shenzhen 518105, China
Haili Shi: Shenzhen Batian Ecotypic Engineering Company Limited, Shenzhen 518105, China
Zongkang Wang: Shenzhen Batian Ecotypic Engineering Company Limited, Shenzhen 518105, China
Dongfang Han: Shenzhen Batian Ecotypic Engineering Company Limited, Shenzhen 518105, China
Jixian Duan: Shenzhen Batian Ecotypic Engineering Company Limited, Shenzhen 518105, China
Dehan Wang: College of Nature Resources and Environment, South China Agricultural University, Guangzhou 510642, China

Sustainability, 2020, vol. 12, issue 6, 1-13

Abstract: Rice husk gasification slag (RS) is a type of biochar that is one of the main by-products generated from the production of biomass power with rice husk as the feed. This study aimed to explore the short-term effect of the application of RS on the movement and transformation of fertilizer P in two different soil types through an incubation experiment. The results showed that the RS addition had a significant influence on the diffusive movement of P in soil microsites close to fertilizer placements both in latosolic red soil and fluvo-aquic soil. After 50 d of incubation, most of the WE-P (water-extractable P), AE-P (acid-extractable P), and Olsen-P (available P) were concentrated within 0–5 mm from the fertilization site. WE-P, Olsen-P, and the movement amount of the P in the 0–5 mm soil section were significantly increased at all levels of the RS application in the fertilizer P both in the two soil types. The application of the RS reduced the sorption and precipitation of the fertilizer P in the soil and improved the efficiency of the fertilizer P. The findings presented in this study may be used as references in developing RS applications that reduce losses of fertilizer P and reduce environmental risks.

Keywords: rice husk gasification slag; water-extractable P; acid-extractable P; available P; diffusive movement of P (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
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