tailieunhanh - Báo cáo khoa học: "Influence of on cutting methods and dates stump sprouting in Holm oak (Quercus ilex L) coppice"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài:"Influence of on cutting methods and dates stump sprouting in Holm oak (Quercus ilex L) coppice. | 449 Ann Sci For 1992 49 449-464 Elsevier INRA Original article Influence of cutting methods and dates on stump sprouting in Holm oak Quercus ilex L coppice M Ducrey M Turrel INRA Station de Sylviculture Méditerranéenne Avenue A Vivaldi F-84000 Avignon France Received 10 February 1992 accepted 11 May 1992 Summary The goals of this study were to compare height growth of stump sprouts in Quercus ilex stools cut by different methods at various times during the year. Four cutting methods were compared chain saw at ground level and at 15 cm above ground axe and saut du piquet stump breaking . Cuttings were carried out every 2 months for a period of 1 year. Several important results can be described 4 years after cutting. Cuttings performed during the dormant season resulted in minimum stool mortality and maximum new sprout number height and diameter growth. An exception was cutting made during a winter frost period. Summer cuttings led to the poorest growth which however tended to be regained in subsequent years. Axe and chain saw cuttings yielded better results than saut du piquet cutting. This last method resulted in high stool mortality and both fewer and smaller sprouts. Sprouts appeared to be more numerous and grew better when the stools initially had large and numerous shoots. Quercus ilex LI coppice stump sprout cutting method cutting date Resume Influence des methodes et dates d exploitation sur la regeneration par rejets de souche des taillis de chêne vert Quercus ilex L . L objectif de cette étude est de comparer la croissance de cépées de ctìêne vert Quercus ilex L exploitées par differentes méthodes à diffe-rentes époques de I annee. Quatre methodes d exploitation ont été comparées tronọonneuse au ras du sol et à 15 cm au-dessus du sol hache et saut du piquet . Les exploitations ont été faites tous les 2 mois pendant une année entière. Les principaux résultats obtenus 4 années après exploitation sont les suivants. Les exploitations faites hors saison de .