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植烟土壤物理特性及碳库对不同粒径生物质炭的动态响应 预览

Dynamic response of tobacco planting soil physical properties and carbon pool to different biochar particle sizes
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摘要 为探究不同粒径生物炭对土壤物理化学特性以及土壤碳库的影响,在盆栽条件下,设置5个生物炭粒径施用水平:CK(不施生物炭)、T1(500~2 000μm)、T2(250~500μm)、T3(20~250μm)、T4(<20μm)。结果表明:(1)不同粒径生物炭均能显著降低土壤容重,以T4降幅最大(4.13%)。(2)不同粒径生物炭均能显著提高田间持水量(WHC),提高幅度表现为T4>T3>T2>T1,但施生物炭处理间差异不显著。(3)施生物炭均能显著提升水稳性团聚体平均重量直径,以T4处理最高,但T4、T3、T2处理间差异不显著。(4)施用生物炭处理的土壤全碳、水溶性有机碳、易氧化态碳均显著高于CK,常规粒径生物炭在烤烟生育初期较不施生物炭显著增加了土壤微生物量碳(MBC)含量,后期则降低土壤MBC含量。小粒径生物炭较常规粒径生物炭T1在烤烟移栽45d后显著降低了土壤微生物量碳含量。(5)生物炭粒径越小,对土壤碳库管理指数的提升效果越好,T4对土壤碳库管理指数提升显著。综上所述,生物炭粒径越小对土壤容重、田间持水量及团粒结构的改良效果越优,同时,小粒径生物炭施用下土壤有机碳活性和碳库管理指数均优于常规粒径生物炭,更有利于提升地力和改善土壤质量。 In order to explore the effects of biochar with different particle sizes on soil physical properties and soil carbon pool,five biochar particle size levels were set up with pot experiment:CK(no biochar),T1(500~2 000μm),T2(250~500μm),T3(20~250μm),T4(<20μm).The results showed that:(1)All biochar with different particle sizes significantly reduced soil bulk density,with the largest decrease by 4.13%in T4.(2)Different particle sizes of biochar significantly increased the field water holding capacity(WHC),and the increase rate was T4>T3>T2>T1,but the difference between biochar treatments was not significant.(3)The application of biochar significantly increased the water-stable aggregate WMD,which was the highest with T4 treatment,but the difference between T4,T3 and T2 treatment was not significant.(4)The soil total organic carbon,dissolved organic carbon and readily oxidized organic carbon in the soil treated with biochar were significantly higher than those of CK.The conventional biochar had significantly increased soil MBC content in the early stage of flue-cured tobacco growth,reduced soil MBC content in later stage.(5)The smaller the biochar particle size,the better the improvement of the soil carbon pool management index,and the T4 had a significant increase in the soil carbon pool management index.In summary,the smaller the biochar particle size,the better the soil bulk density,field water holding capacity and agglomerate structure improvement.At the same time,the soil organic carbon activity and carbon pool management index of small particle size biochar application are better than the conventional particle size biochar.It is more conducive to improving fertility and improving soil quality.
作者 李佳轶 刘文 任天宝 李亚森 王省伟 刘英杰 殷全玉 樊鹏飞 刘国顺 LI Jia-yi;LIU Wen;REN Tian-bao;LI Ya-sen;WANG Sheng-wei;LIU Ying-jie;YIN Quan-yu;FAN Peng-fei;LIU Guo-shun(Tobacco College of Henan Agricultural University/National Tobacco Cultivation Physiological and Biochemical Research Center,Zhengzhou Henan 450002;Zhengzhou City Tobacco Company of Henan Tobacco Company,Zhengzhou Henan 450002;Henan Biochar Engineering Technology Center/Henan Engineering Laboratory of Biochar Technology,Zhengzhou Henan 450002)
出处 《中国土壤与肥料》 CAS CSCD 北大核心 2019年第2期14-23,共10页 Soil and Fertilizer Sciences
基金 国家重点研发计划课题“绿肥高效利用下作物生产化肥减施技术集成与应用”(2017YFD0200808) 登封地区植烟土壤生态保育及修复技术研究及利用(ZYKJ201501) 水肥耦合效应对登封烟区豫烟品种产质量及肥料利用率的影响(ZYKJ201416).
关键词 生物炭 粒径 微米 土壤物理 土壤碳库 biochar particle size micron soil physics soil carbon pool
作者简介 通讯作者:李佳轶(1994-),男,四川绵阳人,硕士研究生,主要研究方向为烟草栽培生理。E-mail:714646215@qq.com;通讯作者:刘国顺,E-mail:liugsh1851@163.com。
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