生物炭对花岗岩砖红壤团聚体稳定性及其总碳分布特征的影响  

Effects of Biochar on Stability and Total Carbon Distribution of Aggregates in Granitic Laterite

作　　者：吴鹏豹[1] 解钰[1] 漆智平[2] 吴蔚东[1] 

机构地区：[1]海南大学热带作物种质资源保护与开发利用教育部重点实验室,海南海口570228 [2]中国热带农业科学院热带作物品种资源研究所,海南儋州571737

出　　处：《草地学报》2012年第4期643-649,共7页Acta Agrestia Sinica

基　　金：国家自然科学基金资助项目(40761024);海南大学211工程项目"热带作物遗传育种与生态保育"资助

摘　　要：通过不同浓度生物炭处理进行海南花岗岩砖红壤的小区试验,研究生物炭对花岗岩砖红壤水稳性团聚体以及土壤总碳的影响。结果表明:18个月后,与对照相比,0.5%或1.0%生物炭处理的水稳性团聚体几何平均直径(GMD)分别提高15.64%和10.80%;大于5mm水稳性团聚体含量分别增加98.75%和88.37%。1.0%生物炭处理下的3～5mm,2～3 mm和0.5～1 mm粒级水稳性团聚体总碳含量比对照分别增加32.24%,39.31%和306.36%;1.0%生物炭处理下>5mm粒级的水稳性团聚体的总碳分配比例比对照增加90.44%。综合分析认为,生物炭对改善花岗岩砖红壤团聚结构、增加土壤总碳含量有积极意义。Effects of biochar on soil water-stable aggregates and total carbon were investigated with three biochar treatments in Granitic Laterite.Eighteen months later,results showed that,compared with the control,the biochar treatments of 0.5% and 1.0% significantly increased geometric mean diameter（GMD） of water-stable aggregates by 15.64% and 10.80%.Both treatments increased the contents of 5 mm water-stable aggregates by 98.75% and 88.37%,respectively.The biochar treatment of 1.0% increased the total carbon of 3-5 mm,2-3 mm and 0.5-1 mm water-stable aggregates by 32.24%,39.31% and 306.36%,respectively,and increased the distribution proportion of total carbon in 5 mm water-stable aggregates by 90.44% compared with the control.Therefore,biochar was beneficial for latosol to improve soil structure and increase soil total carbon.

关 键 词：生物炭 砖红壤 团聚体 总碳 分布 牧草 

分 类 号：S141[农业科学—肥料学] S152.481[农业科学—农业基础科学]