草原化荒漠放牧強度試驗研究.pdf

1、內(nèi)蒙古農(nóng)業(yè)大學碩士學位論文草原化荒漠放牧強度試驗研究姓名：薩茹拉其其格申請學位級別：碩士專業(yè)：草業(yè)科學指導教師：敖特根布仁吉雅20070501ResearchonGrazingIntensityinthesteppedesertAbstractTheresearchwasconductedfromMay28toSep28，2006，inthesteppedesertinwestofOrdos，InnerMongoliaWestudyth

2、eeffectofdifferentgrazingintensitiesonvegetationandgoatperformanceinordertoprovidebasicdataforsteppeThemainresultsshowedthat：1Coverage，heightandstandingcropswerefoundhighestinthecheckplotandthatwaslowinheavystockingplott

3、hanthemoderategrazingAlltheaboveindexofcommunitiesinthegoatgrazingdistrictwerefoundhigberthansheepunderthesamegrazingintensity2Intrialplot，plantscompensatorygrowthhadintimatecorrelationwithgrazingintensityWhengrazinginte

4、nsitywaslowerto10490at／hm二，plantcommunitiesshowedequalcompensatorygrowth，butifgrazingintensitywashigherthan10490at／hm2，plantcommunitiesshowedundercompensatorygrowthunderthesamegrazingintensityplantcommunityinthegoatgrazi

5、ngdistrictshowedequalcompensatorygrowth，butplantcommunityinthesheepgrazingdistrictshowedundercompensatorygrowth3Therewasasignificantdifferenceinthebodyweightgainof90atsunderthedifferentgrazingintensityDailygainofsheepWas

6、significanthigherthangoatinthesamegrazingintensity4WiththeincreasinggrazingintensitythefeedingtimeandwanderingtimeincreasedandtheruminantandresttimedecreasedTherewasnosignificantdifferenceinnumbersofdefecationandmicturit

7、ion，butthereWassignificantdifferencewithseasonsComparedwiththegoats，thefeedingtimeofsheepwaslongerandthetimeofruminationandmigrationWasshorterthanthatofgoatsAndtheExcretionfrequencyWasmorethanthatofgoats，5Inthewaltinseas

8、onthefittestgrazingintensityis104sheep／hm2inthairegionKeywords：Steppedesert：Goat；GrazingintensityDirectedby：ForAoTegenExpansionresearcherBuRenjiyaApplleantforMasterdegree：SaruIaqiqige(GrassIandResources)(CollegeofEcology