收稿日期:2022-12-12基金项目:2009—2020年化肥减量增效项目作者简介:宋刚(1985—),男,贵州余庆人;农艺师,主要从事植物营养与土壤肥料研究(E-mail:543420912@qq.com)。不同利用方式对紫色土有机碳含量的影响宋刚,吴僭,杨梅,胡腾胜,侯春华,龙永根(黔东南州土壤肥料站,贵州凯里556000)摘要:不同的利用方式能够改变土壤有机碳在土层中的分布,进而对土壤有机碳及土壤碳储量产生影响。本研究以贵州省黄平县旧州镇紫色土为研究对象,通过对0~40cm土层由表及里每20cm进行取样,对不同的耕作利用方式土壤有机碳含量进行测定数据统计分析,探索在不同土壤耕作利用方式下,土壤有机碳含量在垂直剖面中的关系。研究结果表明,在不同土壤耕作利用方式下,耕作层的有机碳含量变化幅度较大,而在20~40cm之间的有机碳变化幅度较小。且在土层0~40cm剖面上土壤有机碳的含量均由土壤深度的增加而下降,即有机碳含量顺序为菜园地>水稻土>玉米地,菜园地有机碳含量最高,为11.87g/kg,玉米地有机碳含量最低,为3.07g/kg,降低幅度不一致,以菜园地下降最为明显。关键词:土壤有机碳;土地利用方式;紫色土中图分类号:S153.6+2文献标志码:A文章编号:1008-2239(2023)03-0053-05EffeetsofOrganicCarbonContentofPurpleSoilinbyDifferentUtilizationMethodsSONGGang,WUJian,YANGMei,HUTengsheng,HOUChunhua,LONGYonggen(SoutheastStateSoilandFertilizerStationofKaiLi,KailiGuizhou556000,China)Abstract:Differentutilizationmethodscanchangethedistributionofsoilorganiccarboninthesoillayer,andthenaffectthesoilorganiccarbonandsoilcarbonstorage.ThisstudytookthepurplesoilofJiuzhouTown,HuangpingCounty,GuizhouProvinceastheresearchobject.Throughsamplingthe0-40cmsoillayerfromthesurfacetothebottomevery20cm,thesoilorganiccarboncontentofdifferenttillageandutilizationmeth-odsweremeasuredandstatisticalanalysisofthesoilorganiccarboncontentdata,toexploretherelationshipbetweensoilorganiccarboncontentintheverticalprofileunderdifferentsoiltillageandutilizationmethods.Theresultsshowedthatunderdifferenttillageandutilizationmethods,thevariationrangeoforganiccarboncontentinthetilledlayerwaslarge,butthevariationrangeoforganiccarboncontentbetween20cmand40cmwassmall.Inthe0-40cmsoillayer,thesoilorganiccarboncontentdecreasedwiththeincreaseo...
