Nutrient cycling and greenhouse gas emissions from soil amended with biochar-manure mixtures

作     者：Carlos M.ROMERO Chunli LI Jen OWENS Gabriel O.RIBEIRO Tim A.MCALLISTER Erasmus OKINE Xiying HAO Carlos M.ROMERO;Chunli LI;Jen OWENS;Gabriel O.RIBEIRO;Tim A.MCALLISTER;Erasmus OKINE;Xiying HAO

作者机构：Agriculture and Agri-Food CanadaLethbridge Research and Development CentreLethbridgeAlberta T1J 4B1(Canada) Department of Biological SciencesFaculty of Arts&SciencesUniversity of LethbridgeLethbridgeAlberta T1K 3M4(Canada) Department of Animal and Poultry ScienceUniversity of SaskatchewanSaskatoonSaskatchewan S7N 5A8(Canada) 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2021年第31卷第2期

页      面：289-302页

核心收录：

学科分类：082802[工学-农业水土工程] 07[理学] 08[工学] 0828[工学-农业工程] 0713[理学-生态学] 

基　　金：funded by the University of Lethbridge(Canada)in partnership with the Agricultural Greenhouse Gases Program(AGGP)of Agriculture and Agri-Food Canada 

主　　题：animal husbandry black carbon carbon dioxide methane Orthic Black Chernozem soil fertility 

摘      要：Integrating biochar into cattle diets has recently emerged as a potential management practice for improving on-farm ***,information concerning the cycling of biochar-manure mixtures is scarce.A 70-d incubation experiment was conducted within two surface(0–15 cm)Mollisols with contrasting textures,i.e.,sandy clay loam(Raymond)and clayey(Lethbridge),to evaluate the effects of biochar(3 Mg ha^(-1))on cumulative greenhouse gas(GHG)emissions and related fertility attributes in the presence or absence of cattle manure(120 Mg ha^(-1)).Five treatments were included:i)non-amended soil(control,CK),ii)soil amended with pinewood biochar(B),iii)soil amended with beef cattle manure(M)(manure from cattle on a control diet),iv)soil amended with biochar-manure(BM)(manure from cattle on a control diet,with pinewood biochar added at 20 g kg^(-1)of diet dry matter),and v)soil amended with B and M at the aforementioned rates(B+M).A total of 40 soil columns were prepared and incubated at 21℃and 60%–80%water-holding *** average,total CO_(2)fluxes increased by 2.2-and 3.8-fold under manure treatments(i.e.,M,BM,and B+M),within Raymond and Lethbridge soils,respectively,relative to CK and ***,total CH4 fluxes were the highest(P0.05)in Raymond soil under B+M and BM relative to CK and B,and in Lethbridge soil under M and BM relative to CK and *** Lethbridge soil,application of BM increased cumulative N_(2)O emissions by 1.8-fold relative to *** 70-d incubation,amendment with BM increased(P0.05)PO_4-P and NO_3-N+NH_4-N availability in Raymond and Lethbridge soils compared with B.A similar pattern was observed for water-extractable organic carbon in both soils,with BM augmenting(P0.05)the occurrence of labile carbon over CK and *** can be concluded that biochar,manure,and/or biochar-manure have contrasting short-term effects on the biogeochemistry of *** relatively low application rates,biochar does not necessarily counterbalance manure-derived inpu