TAILIEUCHUNG - Báo cáo lâm nghiệp: "The root-plant ratio changes in the first growing periods of wild cherry (Prunus avium L.) plantations"

Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: The root-plant ratio changes in the first growing periods of wild cherry (Prunus avium L.) plantations. | JOURNAL OF FOREST SCIENCE 53 2007 3 113-118 The root-plant ratio changes in the first growing periods of wild cherry Prunus avium L. plantations I. Kupka Faculty of Forestry and Environment Czech University of Life Sciences Prague Prague Czech Republic ABSTRACT The root-plant ratio is one of the important parameters for planting stock quality. We suppose that the ratio is one of the driving variables for the growth performance of new plantation in the forest. The study summarises data on the volume of major parts of 4 years old wild cherry trees. An allometric analysis of different parts of plants in relation to the growth performance of wild cherry trees was done. The results show a close positive relationship between the volume of the whole root system and aboveground biomass. The same is true of the fine root proportion in the root system. Data also document that the efficiency of root system is not decreasing during the root development - at least in the investigated period. The same results were obtained for fine root efficiency. Data confirm the importance of the root-plant ratio for the growth performance of new plantation in the forest provided that harmful factors are not at a limiting level. Keywords regeneration root system growth performance of young plantation wild cherry Artificial regeneration remains the main system of silviculture in the Czech Republic Anonymous 2005 . Forest Act No. 289 1995 lays down to perform the regeneration of forest land after final cut within a 2-year period and to get the new reforestation in safe growing conditions within 7 years after final cut. This underlines the importance of good growth performance of new plantations provided that the reforestation is well protected from harmful biotic and abiotic factors . weed competition game browsing beetle infestation etc. The overcoming of planting shock is an important factor where the root system role is substantial Ju-rásek 2004b . Mauer and Palátová 2004a propose to .

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