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1、2014年5月防護(hù)林科技May,2014第5期(總128期)ProtectionForestScienceandTechnologyNo.5(SumNo.128)文章編號:1005-5215(2014)05-0020-03不同植被類型土壤理化性質(zhì)研究向光志,楊志訓(xùn),秦連崗(貴州省金沙縣林業(yè)局,貴州畢節(jié)551800)摘要:采用樣方法,研究了不同植被下的土壤理化性質(zhì)。結(jié)果表明:馬尾松純林的土壤密度顯著大于刺槐純林和馬尾松+刺槐混交林,但田間持水量和總孔隙度最小;馬尾松純林有效鉀含量最高,刺槐純林最低;馬尾松純林有效磷、堿解氮、有機(jī)質(zhì)最低,刺槐純林與馬尾松+刺槐林
2、沒有顯著差異;馬尾松+刺槐pH值最高,馬尾松純林和刺槐純林之間沒有顯著差異;各植被土壤堿解氮與有效鉀呈顯著負(fù)相關(guān),有機(jī)質(zhì)與有效鉀、堿解氮及pH值呈顯著正相關(guān),有效磷和pH值呈顯著負(fù)相關(guān);馬尾松+刺槐林和刺槐純林的田間持水量、總孔隙度、堿解氮、有機(jī)質(zhì)、有效磷沒有顯著差異。從生態(tài)學(xué)的角度考慮,建議營造混交林,以便增加抗逆性,降低營林成本。關(guān)鍵詞:馬尾松;刺槐;純林;混交林;土壤理化性質(zhì)中圖分類號:S714.2文獻(xiàn)標(biāo)識碼:Adoi:10.13601/j.issn.1005-5215.2014.05.006SoilPhysical&ChemicalPropertie
3、sofDifferentVegetationTypesXiangGuangzhi,YangZhixun,QinLiangang(BureauofForestry,JinshaCounty,GuizhouProv.,Bijie551800,China)Abstract:Thesoilphysical&chemicalpropertiesunderdifferentvegetationswerestudiedbyusingsamplingmeth-ods.ResultshowsthatthesoilbulkdensityofPinusmassonianapure
4、forestissignificantlylargerthanthatofpureforestofRobiniapseudoacacia&Pinusmassoniana+Robiniapseudoacacia,butthefieldcapacity&totalporosityaretheminimum;thecontentofavailablepotassiumismaximuminPinusmassonianaforest,Robiniapseudoacaciaisminimum;availablephosphorus,availablenitrogen,
5、organicmatterofPinusmassonianaforestislowest,RobiniapseudoacaciaandmixedforestofPinusmassoniana+Robiniapseudoacaciahavenosignificantdifference;thepHvalueofPinusmassoniana+Robiniapseudoacaciaisthehighest;thepureforestofPinusmassonianahasnosignif-icantdifferencewiththepureforestofRob
6、iniapseudoacacia.Correlationanalysisshowsthatthealkali-hydrolysablenitrogenandavailablepotassiumshowasignificantnegativecorrelation,organicmatter,availablepotassium,availablenitrogenandpHissignificantlypositivelycorrelate,theavailablephosphorusandpHisnegativelyrelate.Thefieldwaterc
7、apacity,totalporosity,availablenitrogen,organicmatter,availablephosphorusofRobiniapseudoacaciaandPinusmassoniana+Robiniapseudoacaciahavenosignificantdifference.Fromanecologicalpointofview,itissug-gestedthatmixedforestshouldbebuiltinordertoincreasetheresistanceandreducethecostofsilv
8、iculture.Keywords:Pinusmas