東北羊草草原不同生境土壤微生物與土壤理化性質(zhì)關(guān)系研究.pdf

1、東北師范大學(xué)碩士學(xué)位論文東北羊草草原不同生境土壤微生物與土壤理化性質(zhì)關(guān)系研究姓名：呂秀華申請學(xué)位級別：碩士專業(yè)：植物學(xué)指導(dǎo)教師：張常鐘2003.5.1AbstractThereportisfocusingontypicalLeymuschinensiscommunitywhichwasgrazedindifferentintensityintheleymuschinensisgrasslandinnortheastChinaWedete

2、rmjnedthesoi1microorganismsamount，microbialbiomass，sollrespirationrateandactivityofsoilenzyme(soilcatalase，incertaseandpolyphenoloxidase)，environmentalfactorsaswellafterexaminationofthatparticularareaWestudiedandanalyzed

3、therelationshipbetweenthemduetothedifferentseasonTheconsequenceofexaminationsshowedthatsoilmicroorganism，soilchemicalpropertiesaredifferentbetweentheprotecting，grazingandsoilsalinityareaThequalityofMicroorganismamount，mi

4、crobialbiomass，sollrespirationrateandactivityofsoilenzymehavebeenreducingbytheraisingofgrazingactivitiesThesoilmicroorganismamount，microbialbiomass，respirationrateandsoi1enzymeshowedasingle—peakcurvereachedatthetopbetwee

5、nJulyandAugustduringtheyearAccordingtotheresultsofsignificancetestthatsoilmicrobialbiomasswaspositivelycorrelatedwithsoilmoisture，soiltemperature，soilorganicmattercontent，totalNand—P。andavailableNThecorrelationsbetweenth

6、emhavereachedsignificantorextremelysignificantlevelButthecorrelationbetweenmicrobialbinmassandsoilPHshowednegativelyTherewasnosignificantcorrelationbetweenmicrobialbiomassandavailablePSollmicrobialbiomassindifferentenvir

7、onmentwassignificantorextremelysignificantpositivelycorrelatedwithcatalaseandincertaseTherewasnosignificantcorrelationbetweenmicrobialbiomassandpoly—phenoloxidaseRegressionanalysisshowedthatitwaslinearpositivecorrelation