MgO-modified biochar increases phosphate retention and rice yields in saline-alkaline soil
文献类型： 外文期刊
作者： Wu, Lipeng 1 ; Wei, Changbin 2 ; Zhang, Shirong 1 ; Wang, Yidong 3 ; Kuzyakov, Yakov 3 ; Ding, Xiaodong 1 ;
作者机构： 1.Qingdao Agr Univ, Coll Resources & Environm, Qingdao 266109, Shandong, Peoples R China
2.Chinese Acad Trop Agr Sci, Minist Agr, South Subtrop Crop Res Inst, Key Lab Trop Fruit Biol, Zhanjiang 524091, Guangdong, Peoples R China
3.Tianjin Normal Univ, Tianjin Key Lab Water Resources & Environm, Tianjin 300387, Peoples R China
4.Univ Gottingen, Dept Soil Sci Temperate Ecosyst, Dept Agr Soil Sci, D-37077 Gottingen, Germany
5.Kazan Fed Univ, Inst Environm Sci, Kazan 420049, Russia
6.RUDN Univ, Agrotechnol Inst, Moscow, Russia
关键词： MgO-Modified biochar; Phosphate adsorption; Rice productivity; Biochar properties
期刊名称：JOURNAL OF CLEANER PRODUCTION （ 影响因子：9.297； 五年影响因子：9.444 ）
ISSN： 0959-6526
年卷期： 2019 年 235 卷
页码：
收录情况： SCI
摘要： Biochar modifications and fortifications are used to increase soil nutrient retention and increase crop yields, but the effects on phosphate (Pi) availability for plants are unknown for saline-alkaline soils. We used peanut shells (Peanut-S) as the starting material for biochar (Biochar) and MgO-modified biochar (MgO-Biochar) to study the Pi adsorption mechanisms under field conditions. Compared with Biochar and Peanut-S, MgO-Biochar adsorbed Pi in aqueous solution 20% better and reached equilibrium at twice the rate at twice the rate. MgO-Biochar also showed better Pi adsorption in saline soils and the maximum Pi adsorption capacity was 1.46 times higher than Biochar. We found that electrostatic attraction, precipitation and exchangeable anions contributed to the adsorption of phosphate and MgO-Biochar possessed the greatest adsorption capacity. MgO-Biochar application increased the soil available P content and resulted in higher rice yields in field experiments in the saline soil conditions found in the Yellow river delta region. Overall, our study offers a theoretical and practical foundation for the remediation of saline soil using MgO-modified biochar. (C) 2019 Elsevier Ltd. All rights reserved.
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