Báo cáo lâm nghiệp: "A two-step mortality model for even-aged stands of Pinus radiata D Don in Galicia (Northwestern Spain)" doc

... mor- tality model for even-aged stands of Pinus radiata including competition-induced mortality (regular mortality) and non- competition-induced mortality (irregular mortality) by relating mortality ... A two-step mortality model for even-aged Pinus radiata stands in Galicia (Northwestern Spain) is presented. The model was deve- loped using data...

Ngày tải lên: 08/08/2014, 01:21

Ngày tải lên: 07/08/2014, 16:20

... which destroyed together almost 30000 ha of Pinus nigra stands [4, 5]. The dif- ference between the predicted and observed fire probabilities in stands dominated by Pinus pinaster and Pinus pinea ... AND METHODS 2.1. Inventory plots The modelling data comprised inventory data of forest stands, on one hand, and fire occurrence data, on the other hand. The data on for- est s...

Ngày tải lên: 08/08/2014, 00:22

... [10], in spite of this model was used to estimate the height of individual trees in a growth model for Pinus radiata in New Zealand. The values of the statistics of the models included in the group ... collected during two inventories of 182 permanent plots of radiata pine (Pinus radiata D. Don) situated throughout Galicia, in the Northwest of Spain....

Ngày tải lên: 08/08/2014, 01:21

... the coordinates of the left and right hand edges of the stem cross- section measured on photo 1, and Yl, Yr are the coordinates of left and right hand edges measured on photo 2. Using the 3D profile, ... position of the standing trees. The disadvantages of this method are that a minimum of three targets per log must be attached to the stem of standing trees, and considerable tim...

Ngày tải lên: 07/08/2014, 16:21

... general mean ± SD of q was 0.86 ± 0.148. The values of α and q did not depend on link order or diameter in our study nor in [23]. The model of West et al. has been applied for scaling root biomass ... angles independently of the form and density of the angle dis- tribution, and no fitting of a theoretical distribution to data is necessary. Full application of the mode...

Ngày tải lên: 08/08/2014, 01:21

... such as dominant height, stand age and site index used in even-aged models are not directly applicable to uneven-aged stands [27]. The age of individual trees of an une- ven-aged stand is often ... significant in the final version of the models. Another version of the models was prepared using species dummies as additional predictors. 2.4. Ingrowth modelling A linear model p...

Ngày tải lên: 08/08/2014, 01:22

... Unified Statistical Model for the Identification of English BaseNP Endong Xun Microsoft Research China No. 49 Zhichun Road Haidian District 100080, China, i-edxun@microsoft.com Ming Zhou Microsoft ... of our statistical model on various size of the training data, x-coordinate denotes the size of the training set, where "1" indicates that the training set is from sectio...

Ngày tải lên: 08/03/2014, 05:20

... suppression of friction on the back and leading surfaces against the machined surface. Defining the value of individual parts of force F is quite difficult and depends on many aspects. e part of force ... deformation of a mass in the surroundings of a cutting edge, – forces necessary for deflection of chips and sup - pression of chip friction against the leading edge of...

Ngày tải lên: 07/08/2014, 03:22

... grosseur du grain / lignine 1. INTRODUCTION Genetic improvement and intensive silviculture of loblolly pine (Pinus taeda L.) have increased forest plantation produc- tivity significantly in the ... analyses Juvenile wood and transition wood were compared for micro wood traits using the paired t-tests. A general linear mixed model was fitted to data to estimate variance components for...

Ngày tải lên: 07/08/2014, 16:20