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Citation:

Effects of P lanting Density on Increment of SapwoodandWetwood in Populus × xiaohei

  • Received Date: 2006-09-08
  • The effects o f d ifferent plan ting densit ies ( 2 m×5m、4 m×5m、4m×10 m) on increment of sapw oodand w etwood o fPopulus× xiaohei w ere stud ied from Shuozhou Country, Shanx i Prov ince. The resu lts indicated thattherew ere insignificant differences in the number of sapwood grow th rings at various p lanting densities, w hile significant d ifferences ex isted in the number of w etw ood grow th ring s. The plan ting density show ed little impact on sap wood width, wh ile it had high ly sign if icant effects on w etw ood w idth. For bo th sapwood and w etwood basa l area,therew ere high ly sign ificant d ifferences at various p lanting densities. A tendency o f increasing sapwood and we tw oodw idth as w ell as basa l area w ith decreasing plant ing densities was found, and itw as a lso no ticed that thew id th andbasal area o fw etw ood increasedmore in tensively than that of sapwood. The w etw ood proportion ranged from 60% to68%, show ing a negative re lationship w ith the p lanting density. In genera,l the plan ting density show ed various degrees o f impact on g row th of both sapw ood and we tw ood ofP opulus×x iaohei, and it showedmore obv ious effects onw etw ood grow th, compara tively.
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Effects of P lanting Density on Increment of SapwoodandWetwood in Populus × xiaohei

  • 1. Research Ins titu te of Wood Industry, CAF, Beijing?? 100091, china

Abstract: The effects o f d ifferent plan ting densit ies ( 2 m×5m、4 m×5m、4m×10 m) on increment of sapw oodand w etwood o fPopulus× xiaohei w ere stud ied from Shuozhou Country, Shanx i Prov ince. The resu lts indicated thattherew ere insignificant differences in the number of sapwood grow th rings at various p lanting densities, w hile significant d ifferences ex isted in the number of w etw ood grow th ring s. The plan ting density show ed little impact on sap wood width, wh ile it had high ly sign if icant effects on w etw ood w idth. For bo th sapwood and w etwood basa l area,therew ere high ly sign ificant d ifferences at various p lanting densities. A tendency o f increasing sapwood and we tw oodw idth as w ell as basa l area w ith decreasing plant ing densities was found, and itw as a lso no ticed that thew id th andbasal area o fw etw ood increasedmore in tensively than that of sapwood. The w etw ood proportion ranged from 60% to68%, show ing a negative re lationship w ith the p lanting density. In genera,l the plan ting density show ed various degrees o f impact on g row th of both sapw ood and we tw ood ofP opulus×x iaohei, and it showedmore obv ious effects onw etw ood grow th, compara tively.

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