贵州南部人工草地山羊放牧系统植被特征分析(英文)

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1、2013nomicdevelopmentsandwithvariedfourgrazingmethodsindifferentsea-berandconstitutesanindexofeco-causes，IrrationaIgrazingapproachsons，likeheavygrazingandmoderatenomiccharacter．Thetestresultsshowconstitutesadominantcauseingrass—grazing(Table1)．AblackgoatinthatfOrheavygrazingmethodinIanddegrada

2、tion．Guizhouattwo-yearoldwastakenasspring，grasscommunityheightwasControlledgrazingsystemrefersthetestlivestockand90healthyandIessafectedwithinsignificantdiffer-toplannedgrazinginayearandalmsdisease-freefemalegoatswerecho—ences(P>0．05)；insummer(July)，tooptimizeforageresourcesbycon—senwithavera

3、geweightsat26．3±0．6grasscommunityheightsjnSA1andtrollingIivestockfeeding．Thesystemkg．Specifically，55goatswereheavilySA3werebothIowercomparedwithisalwaysconfusedwithrotationaIgrazedandtherestweremoderatelySA2andSA4；inautumn(October)，grazingwhichinvolvesdividingthegrazed．Theresultsshowednoneofg

4、rasscommunityheightsingroupsrangejntoseveraIpasturesandthensignificantdiferencesofweightsbe-withthefourmethodswereofsignifi-grazingeachinsequence．Specifically，tweenthetwogroups．cantdifferences．whichisinconsistentthelattertargetstoImprovegrasslandTherefore，inaspecificseasonwiththeresultsinsumm

5、er．qualityandyield，andtheformer，in【spring，summerorautumn)，heavyE竹ectsofdi竹erentgrazingmethodscontrast，isforproductionbasedonandmoderategrazingsweresetin—oncommunitygrasscoveroptimizeduseofgrassresources．cludingfourtreatmentsandeveryGrasscoverreflectsthetypeofSincethe1980s．repotsandrese—treatm

6、entwasinthreerotationre-grass，biologicaIassimilationareaandarchesongrazingaregrowingatgions。totaling12grazingplots，biomass．Theresultsshowthatinhomeandabroad。contributedbyThesixrotationregionswereex—spring，grasscoversinSA1andSA4tenserrelationofgrassresourcesandchangedevery5days．Foreveryre-were

7、bothhighercomparedwithSA2Iivestockanddegenerationofenviron-gion，rotationgrazingwasconductedandSA3．contributedbymoderatementqualityp-9]．Inrecentyears，grass-forthreetimesinsummerOrautumn．grazing：Insummer，grasscoversinlandexperiencedmanychangesi