圍封禁牧對(duì)鄂托克旗草地生物量和家畜飼養(yǎng)的影響.pdf

1、中國農(nóng)業(yè)科學(xué)院碩士學(xué)位論文圍封禁牧對(duì)鄂托克旗草地生物量和家畜飼養(yǎng)的影響姓名：張國華申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：農(nóng)業(yè)推廣農(nóng)村與區(qū)域發(fā)展指導(dǎo)教師：蘇和20071101AbstractInthispapertheeffectsofforbiddinggrazingongrasslandbiomassinEtuokeandtheeffectsofshelterfeedingandgrazingontheperformanceofgoatwerein

2、vestigatedbythesurveyonthewholeareaandfixedspotexperimentsTheresultsshowedasfollows：Forbiddinggrazingincreasedgrasslandbiomasssignificantly，thegrasslandbiomassWaSsignificantlyaffectedbythedifferenttimeforforbiddinggrazin

3、g，andsignificantlyincreasedwiththeprolongingofthetimeforforbiddinggrazingTheweightsoftheewefedbyshelterfeedinggrazinghadchangedinthesametrendinayear，thatis，theweightoftheeweincreasedwiththetimefromJunetoDecemberButthewei

4、ghtdecreasedsignificantlyinJanuaryinthefollowingyearanddecreasedwiththetimeprolonging；theweightoftheewefedbygrazingwasgreaterthanthatoftheewefedbyshelterfeedingfromJunetoDecemberinthesameyear；buttheweightoftheewefedbyshe

5、lterfeedingwasgreaterthanthatoftheewefedbygrazingfromDecemberinthepresentyeartomayinthefollowingyearExceptthemonthlygainsfromDecemberinthepresentyeartoJanuaryinthefollowingyearandfromApriltoMayinthefollowingyearthemonthl

6、ygainsoftheewefedbyshelterfeedingisgreaterthanthatoftheewefedbygrazingComparedwiththeewefedbygrazingtheAverageWoolYield(AwY)oftheewefedbyshelterfeedingincreasedby349，andtheFatYield(FY)increasedbYonetime，theBornWeight(B、聊