金沙江干热河谷地带土壤质量特征研究-水土保持与荒漠化防治专业毕业论文

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1、AbstraCtTitle:StudyOnFeaturesof5011qua!ityintheDry一hotvalleyofJinshaRIVeFMajor:5011andw白terCOnSG四ationandDeserti月CationCOntFOIName:YUZheng5ignature:SuPervisor:Prof.ZhanbinL面S‘gna，ure谁玉呵已KGXinLU5ignature:厉匆奴Abst门CtAimedatthefrontierProblemofthedry一otvalley，5e

2、eologiealeonstruetionalrequirementandsylvieulturalandPedologiealresearch，usingthetheoriesofPedology、restorationeeologyandmierobiology，t司巨ngonthe勿一hotvalleyofJinsha形verresearehobjeet，ehoosinggrasslandondifferentlandusetyPeandelevationasthesamPlearea，througheo

3、lleetingthehistorydata、outdoor，5investigationandanalytiedeterminationof5011samPle，tostudythefeatUresofv硕ation、diseusshowthisfactorsrefleetandindieatedryandwetseasonandestablishstudyarea5011qualityevaluatingindexsystem，thenwithstatistiesmethodPuttingforwardth

4、emainsensitivefactoramongsoilquali妙，thusweeanf破meetnation，5requiremeniofecologicaleonstructionandenvironmentaleffeetevaluation，sequentiallyinereasinglyProvidetheoretieandPractiealsustaintothisareaeeologiealreeonstrUetion.Themainresultsareasfollows:(l)The5011

5、qualityfeal泊resofvariationunderdifferentlandusemodeinthedry一hot、:alley·①5011physieo一ehe而calproperties:After51娜fieantehangein5011physioehemie时ProPertiesafternaiuralwatereandlenutforestbeingchangediniootherlandusetyPes，thedry一hotvalley，5contentofsoilorg画e、tota

6、lnitrogen、totalPhosPhorusandavailable苗trogenobviouslydeerease，allinalltheimPacton5011PhysioehemiealProPerties、vasrelativelysmallaftertransformingtoleucoeePhalalandandabandonedgrassland.ComPositeindexof5011ProPertiesafterthenatUraleandlenutforestehangingintoo

7、therlanduset万Pesshowedadeereasetov田了ingdegrees，itsdeelinefromsmalltolargeouler15grassland>leueoeePhalaland>sugareaneland>eornland>PePPerland>mulberryland.Themoredisturbedbyman，themoredestructiveinflueneeon5011quality，50oneoftheimPo比切tmeasurestoimProvethesoil

8、quality15toinereasetheret山爪oftheamountofsoilmaterialinthisregion.②5011microbialbiomassandmicrobialrespiration:WithnaturalWatereandlenutforestbeingehangedintootherlandusetyPes，5011而erobialbiomass