降雨和立地條件對(duì)飛播造林效果影響問題的研究.pdf

1、西北農(nóng)林科技大學(xué)碩士學(xué)位論文降雨和立地條件對(duì)飛播造林效果影響問題的研究姓名：姜思山申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：農(nóng)業(yè)推廣林業(yè)指導(dǎo)教師：蘇印泉20081001SITECONDITIONSONTHERAINFALLANDTHEEFFECTOFAERIALSEEDINGRESEARCHABSTRACTThisarticlefromtheaerialplantingtostarttheactualwork，tochoosethreeplacesins

2、outhernShaanxicityofaerialforestareatoconductonsiteinvestigation，analysisandresearch，majorfindingsareasfollows：(1)byanalyzingthebestaerialforestvegetationcoverinbetween0307grassvegetationtype，covermorethan08grassshrub，sh

3、rubvegetationtypewasnexttovinedominanteffectofthevaccineintothelotPoor(2)aerialrainfallisthemainfactortotheSUCCESSofafforestationonly40daysafterthebroadcastoftherainfallreached6732mm，thentherateofseedlingteach41％，oneyear

4、afterthevaccineintothecountryinlinewiththerequirementsoftherateof30％(3)withfuzzyevaluationmethodtodeterminewell—beingofthespringsowingtimeinearlyApriltolateAprilofaerialappropriatelevelofupto92％inmidMarchtoearlyAprilaeri

5、alafforestationappropriatelevelof91％inearlyMayto5Inlateaerialappropriatelevelof76％(4)Autumntestemergenceis12timesofthespring’Sinluonancountythewintertemperatureontheimpactoftheseedlings(5)studiedtheburningoftheseedlingsi