tailieunhanh - Báo cáo lâm nghiệp:" Response of newly planted Norway spruce seedlings to fertilization, irrigation and herbicide treatments"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài:" Response of newly planted Norway spruce seedlings to fertilization, irrigation and herbicide treatments" | Ann. For. Sci. 60 2003 637-643 INRA EDP Sciences 2004 DOI forest 2003056 637 Original article Response of newly planted Norway spruce seedlings to fertilization irrigation and herbicide treatments Urban NiLSSONa Goran ỎRLANDERb a SLU Southern Swedish Forest Research Centre Box 49 230 53 Alnarp Sweden b School of Industrial Engineering Vaxjo University 35195 Vaxjo Sweden Received 24 June 2002 accepted 17 February 2003 Abstract - The effect of herbicide fertilization and irrigation treatments on growth of planted Norway spruce seedlings were investigated in an experiment established in 1998 in southern Sweden. After three years the amount of ground vegetation was about the same in fertilized irrigated and fertilized irrigated plots but the amount was about double as in the control. Seedling growth was positively affected by the herbicide treatment. Fertilization increased growth when it was combined with herbicides. Irrigation did not have any significant effect on seedling growth. Results from this study indicate that competition for water between ground vegetation and planted Norway spruce seedlings is of little importance. However this conclusion is restricted to seedling growth during years with at least normal precipitation. It was also indicated that increased nutrient availability is positive for seedling establishment and growth but that the planted seedlings were not growing at their potential even when herbicide irrigation and fertilization treatments were combined indicating establishment problems. fertilization irrigation herbicide seedlings Picea abies Résumé - Effets de la fertilisation de l irrigation et de traitements herbicides sur de jeunes plantations d épicéa commun. Une experimentation installée en 1998 dans le sud de la Suède a permis d etudier l effet de traitements par irrigation fertilisation et application d herbicide sur la croissance de jeunes plantations d épicéa commun. Au bout de trois ans l importance de la vegetation basse .