6种针叶树种的更新试验

Preliminary Study on Renewal of Six Coniferous Species

通过对6种针叶树种的更新造林试验，结果表明：红松、云杉、樟子松造林保存率在80％以上，油松、萌芽松、华山松保存率在65％以下，樟子松在幼龄期（10年）生长较突出，到中幼龄期（20年）时以红松生长最优；在林木质量调查中，红松、云杉健康树占54％～57％，优质树占30％，劣质树占11％～16％。樟子松、油松、萌芽松、华山松健康树占50％左右，优质树占20％，劣质树占26％以上。试验结果认为：红松、云杉是辽宁的理想培育树种，可大力发展；樟子松、油松、萌芽松生长良好，可适当发展；华山松生长不良，不宜发展。

The forestation preserving rate of Pinus koraiensis ,Picea koraiensis and Pinus sylvestris var .mongolica was more than 80% ,while it was lower than 65% for Pinus tabulaeformis ,Pinus echinata and Pinus armandi by cultivationtrial.Thegrowthof Pinussylvestrisvar.mongolicaatjuvenilestage（10-year-old）wasprominent,while it turned to be Pinus koraiensis at middle juvenile stage （20-year-old） .In the arborescence survey ,the number of healthy trees of Pinus koraiensis and Picea koraiensis accounted for 54% ~57% ,high quality trees took up 30% ,and low quality trees was more than 11% ~16% ;however ,they were 50% ,20% ,and 26% respectively for these kinds of qualities of P .sylvestris ,C .pine ,P .echinata and P .armandi .The trial results indicates Pinus koraiensis and Picea koraiensis are ideal cultured tree species ,which should be greatly developed ;while Pinus sylvestris var .mongolica , P .tabulaeformis and P .echinata can be expanded moderately ,and P .armandi is not suitable developed .