TAILIEUCHUNG - Báo cáo khoa học: "The influence of cork oak pruning on the yield and growth of cork"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: The influence of cork oak pruning on the yield and growth of cork. | Ann. For. Sci. 59 2002 753-760 INRA EDP Sciences 2002 DOI forest 2002061 753 Original article The influence of cork oak pruning on the yield and growth of cork Isabel Canellas and Gregorio Montero Silviculture Department CIFOR-INIA Apdo. 28080 Madrid Spain Received 8 February 2001 accepted 22 April 2002 Abstract - Bearing in mind the importance of pruning as a silvicultural treatment in cork oak Quercus suber L. open woodland of the dehesa type an experiment was designed to assess the effect of pruning on cork yield. This work was carried out in two ways synchronically comparing pruned sites with others which were either unpruned or pruned at different times and diachronically comparing pruned and unpruned trees within the same site. The five test sites with forty trees in the synchronic and eighty in the diachronic plots were selected in south-west Spain. In all cases measurements of the cork production were made in kilos per square metre of surface stripped total cork yield per tree and the mean thickness of stripped cork. Analysis was carried out using a paired data comparison test. The effect of pruning on yearly cork growth was also analysed by examining the annual growth rings. In the five plots analysed there were no significant differences 95 confidence intervals between pruned and unpruned trees in terms of kilos of cork produced per square metre of surface stripped nor for total cork yield per tree. Neither were there significant differences in annual cork growth rings even when the pruning was carried out during the cork-stripping period. Quercus suber pruning cork production pruned biomass cork growth Résumé - Influence de l elagage du chêne-liège sur la croissance et la production de liège. Étant donné l importance de l elagage comme traitement sylvicole habituel dans les pâturages de chêne liège Quercus suber L. du type dehesa une expérience a été réalisée pour déterminer l effet de l élagage sur la production de liège. Ce travail a été

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