Amending a tropical Arenosol:increasing shares of biochar and clay improve the nutrient sorption capacity

作     者：Christine Beusch Dennis Melzer Arne Cierjacks Martin Kaupenjohann 

作者机构：Institute of EcologyChair of Soil ScienceTechnische Universität BerlinErnst-Reuter-Platz 110587 BerlinGermany Institute of Agricultural and Urban Ecological Projects(IASP)Affiliated to Berlin Humboldt UniversityPhilippstraße 13Haus 1610115 BerlinGermany Institute of EcologyChair of Ecosystem Science/Plant EcologyTechnische Universität BerlinRothenburgstr.1212165 BerlinGermany Department of Landscape Development/Vegetation TechnologyUniversity of Applied Sciences DresdenPillnitzer Platz 201326 DresdenGermany 

出 版 物：《Biochar》 (生物炭（英文）)

年 卷 期：2022年第4卷第1期

页      面：936-958页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：the German Federal Ministry of Education and Research(BMBF) Project number 01 LL 0904 A-E 

主　　题：Coarse-textured soils Biochar Clay Batch equilibrium experiment Sorption isotherms 

摘      要：Tropical Arenosols may be challenging for agricultural use,particularly in semi-arid *** aim of this study was to evaluate the impact of the addition of increasing shares of biochar and clay on the nutrient sorption capacity of a tropical *** batch equilibrium experiments,the sorption of ammonium-N(NH_(4)^(+)-N),nitrate-N(NO_(3)^(−)-N),potassium(K^(+)),and phosphate-P(PO_(4)^(3−)-P)was quantified for mixtures of an Arenosol with increasing shares of biochar and clay(1%,2.5%,5%,10%,100%)and the unmixed Arenosol,biochar,and *** mid-temperature biochar was produced from Prosopis juliflora feedstock;the clayey material was taken from the sedimentary parent material of a temporarily dry *** the Arenosol-biochar mixture with 10%biochar addition and the biochar increased the NH_(4)^(+)-N maximum sorption capacity(q_(max))of the Arenosol,by 34%and 130%,*** q_(max)of PO_(4)^(3−)-P slightly increased with ascending biochar shares(1-10%)by 14%,30%,26%,and 42%,whereas the undiluted biochar released PO_(4)^(3−)-*** addition slightly reduced NO_(3)^(−)-N release from the Arenosol but strongly induced K^(+)*** the other hand,clay addition of 10%and clay itself augmented q_(max)of NH_(4)^(+)-N by 30%and 162%;ascending clay rates(1-100%)increased q_(max)for PO_(4)^(3−)-P by 78%,130%,180%,268%,and 712%.Clay rates above 5%improved K^(+)sorption;however,no q_(max)values could be *** of NO_(3)^(−)-N remained unaffected by clay ***,clay addition proved to enhance the nutrient sorption capacity of the Arenosol more effectively than biochar;nonetheless,both materials may be promising amendments to meliorate sandy soils for agricultural use in the semi-arid tropics.