Effectiveness of different biochars in remediating a salt-affected Luvisol in Northeast Brazil

作     者：Wallace Melo dos Santos Maria Isidoria Silva Gonzaga JoséAiron da Silva AndréQuintão de Almeida JoséCarlos de Jesus Santos Thomas Antonio Silva Gonzaga Idamar da Silva Lima EloáMoura Araújo 

作者机构：Water Resources Graduate ProgramFederal University of SergipeSão CristóvãoSE 49100‑000Brazil Agronomy DepartmentFederal University of SergipeSão CristóvãoSE 49100‑000Brazil Agriculture Engineering DepartmentFederal University of SergipeSão CristóvãoSE 49100‑000Brazil University of Notre DameNotre DameIN 46556USA Soils and Agricultural Engineering DepartmentFederal University of ParanáCuritibaPR 80060‑000Brazil 

出 版 物：《Biochar》 (生物炭（英文）)

年 卷 期：2021年第3卷第2期

页      面：149-159页

核心收录：

学科分类：082802[工学-农业水土工程] 08[工学] 0828[工学-农业工程] 

主　　题：Biochar Soil remediation Soil salinity Corn growth 

摘      要：Biochar has been proposed as a soil amendment to reclaim salt-affected ***,the evaluation of the different biochar types in these soils is essential due to the significant variation among biochar *** this study,biochars from sugarcane bagasse(SB),orange bagasse(OB),and corncob(CB)were applied alone and in the presence of gypsum(G)to test their potential to remediate a highly degraded saline-sodic soil in Brazil´s Northeast *** that,we conducted a laboratory column-leaching experiment and a greenhouse *** the column-leaching test,we analyzed the sodium adsorption ratio(SAR),the electrical conductivity of the saturation extract(ECe),the concentrations of major ions,and the exchangeable sodium percentage(ESP).Maize plants were grown in the leached soil in a ***-and corncob-derived biochars were more efficient than gypsum in reducing the soil salinity,bringing the indicators below threshold values,and optimizing soil reclamation *** ECe,SAR,and ESP were reduced to 3.42 dS m−1,1.64(mmolc dm−3)0.5 and 4.86%,respectively,in the SB treatment;and to 3.19 dS m−1,0.88(mmolc dm−3)0.5 and 2.53%,respectively,in the CB *** bagasse biochar did not effectively reduce the salinity *** biochar treatments improved seed germination and plant *** SB,CB,SBG,and CBG treatments increased plant height(478–558%),shoot mass(783–983%),and root mass(386–500%),***,the application of SB and CB is an effective alternative to remediate saline-sodic soils and to reduce the impact of soil salinity in the environment.