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《不同土地利用方式及開墾時(shí)間對(duì)巖溶山區(qū)土壤養(yǎng)分空間分布的影響》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、應(yīng)用與環(huán)境生物學(xué)報(bào)2011，17(1):063~0682011-02-25ChinJApplEnvironBiol=ISSN1006-687XDOI:10.3724/SP.J.1145.2011.00063不同土地利用方式及開墾時(shí)間對(duì)巖溶山區(qū)土壤養(yǎng)分空間分布的影響*周傳艷1陳訓(xùn)2*周國逸3閆俊華31（貴州省喀斯特資源環(huán)境與發(fā)展研究中心貴陽550001）2（貴州科學(xué)院貴陽550001）3（中國科學(xué)院華南植物園廣州510650）摘要采集貴州普定典型巖溶山區(qū)7種土地利用方式和3個(gè)不同開墾時(shí)間（27a、39a、48
2、a）的0~10cm、10~20cm、20~40cm土壤樣品，進(jìn)行室內(nèi)理化分析.結(jié)果顯示，林地土壤有機(jī)質(zhì)、全氮、堿解氮累積量較多，玉米黃豆地含量最少.林地土壤0~10cm層有機(jī)質(zhì)、全氮、堿解氮分別比玉米黃豆地高271.0%、317.7%、246.1%.林地和撂荒地對(duì)土壤養(yǎng)分循環(huán)較為有利.林地開墾為農(nóng)業(yè)用地后，土壤有機(jī)質(zhì)、全氮、堿解氮含量明顯下降，全磷、有效磷、全鉀含量沒有明顯變化，有效鉀含量增多.開墾39a的0~10cm層土壤有機(jī)質(zhì)、全氮、全磷、有效磷、有效鉀含量高于開墾27a和48a土壤的含量，堿解氮低于開
3、墾27a和48a土壤的含量；開墾27a的土壤全鉀含量高于開墾39a和48a土壤的含量.開墾時(shí)間長或短對(duì)土壤養(yǎng)分含量的影響未表現(xiàn)特殊規(guī)律性，可能受到其他因素的影響.圖2參20關(guān)鍵詞巖溶山區(qū)；土地利用；開墾時(shí)間；土壤養(yǎng)分CLCS153(273)EffectsofDifferentLandUsesandCultivationPeriodsonSpatialDistributionofSoilNutrientsinKarstMountainousRegion*ZHOUChuanyan1,CHENXun2*,ZHOU
4、Guoyi3&YANJunhua3(1ResearchCenterofKarstResourcesEnvironmentandDevelopment,GuizhouAcademyofSciences,Guiyang550001,China)(2GuizhouAcademyofSciences,Guiyang550001,China)(3SouthChinaBotanicalGarden,ChineseAcademyofSciences,Guangzhou510650,China)AbstractPuding
5、CountyinGuizhou,Chinaisatypicalkarstmountainousregion,wherethe0~10cm,10~20cm,20~40cmsoilsampleswerecollectedfromanareawith7typesoflandusesand3cultivationperiods(27a,39a,48a).Thecontentsofsoilnutrientsincludingorganicmatter(OM),totalnitrogen(TN),totalphosph
6、orus(TP),totalpotassium(TK),availablenitrogen(AN),availablephosphorus(AP)andavailablepotassium(AK)weredeterminedandanalyzed.TheresultshowedthatthecontentsofOM,TNandANinforestlandwerehigherthanthoseofotherlanduses.OM,TNandANinmaize-soybeanfieldswerelowest.O
7、M,TNandANin0~10cmsoilofforestlandwere271.0%,317.7%and246.1%higherthanthoseinmaize-soybeanfields,respectively.Forestlandanduncultivatedlandhadadvantageinsoilnutrientcycling.OM,TNandANdecreasedwiththeprocessofforestlandbecomingcultivatedland,TP,APandTKwereno
8、tfoundwiththistrend,butAKincreasedinthisprocess.However,inthisstudydifferentcultivationperiods(27a,39a,48a)hadnosignificanteffectonsoilnutrients,whichindicatethatotherinfluencingfactorsmightexist.Fig2,Ref20Ke
