Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: "preparation necessary for bur oak receiving post-planting weed control?. | AnnSciFor 1997 54 107-116 Elsevier INRA 107 Original article Is site preparation necessary for bur oak receiving post-planting weed control A Cogliastro1 D Gagnon2 A Bouchard1 Institut de recherche en biologic végétale et Jardin botanique de Montreal. 4101 Sherbrooke Street East PC HIX 2B2 Montreal 2Groupe de recherche en écologle forestiere Université du Quebec à Montreal CP 8888 succursale Centre-ville PC H3C 3P8 Montreal Canada Received 21 March 1995 accepted 13 February 1996 Summary - Plowing and harrowing have been recommended before establishing hardwood plantations on abandoned farmland with herbaceous weed competitors. However mechanical soil preparation is not always practical. The possibility of reducing site preparation efforts by using post-planting weed control treatments was tested. This study compares three different types of site preparation plowing and harrowing plowing harrowing and simazine herbicide a control each plot of which were separated in two halves receiving either one of two post-planting weed control treatments glyphosate herbicide or black plastic mulching in 120 cm strips over the seedling rows of bur oak Quercus macrocarpa Michx . After 5 years of weed control treatment site preparation by plowing and harrowing did not produce superior growth results relative to the control. However growth was superior when this mechanical site preparation was combined with simazine herbicide application. Oak seedling diameter and height were larger in the plastic mulch treatment than in the glyphosate treatment. Results support the feasibility of hardwood reforestation on sites where mechanical soil preparation is impractical if post-planting weed control treatments arc applied. hardwood plantation site preparation herbicide black plastic mulch Quercus tnacrocarpa Resume - La preparation du site est-elle nécessaire lorsqu un traitement de repression des herbacées est appliqué après la plantation de chênes à gros fruits Lc labourage et le hersagc .
