【英语翻译Twentytreeswererandomlyselectedfrom30treesforwhichthebiochemistryofleaveshadbeenpreviouslystudied.Threerametswereassignedfortheexperimentineachofthetencontroltrees.Inthebrowsingtrees,threerametswererandoml】

　　英语翻译

　　Twentytreeswere

　　randomlyselectedfrom30treesforwhichthebiochemistryofleaveshadbeenpreviouslystudied.Threerametswereassignedfortheexperimentin

　　eachofthetencontroltrees.Inthebrowsingtrees,three

　　rametswererandomlyassignedforclipping,which

　　simulatedwinterbrowsingbymammals,andthree

　　becamecontrolramets.Thewithin-treecontrolswere

　　includedinthedesigntostudyiftheeffectsofclipping

　　spreadthroughatreeintootherthanthedamaged

　　ramets.