Báo cáo lâm nghiệp:"Optimising the management of Scots pine (Pinus sylvestris L ) stands in Spain based on individual-tree models" potx

... (200 3) 105–114 © INRA, EDP Sciences, 2003 DOI: 10.1051/forest:2003002 Original article Optimising the management of Scots pine (Pinus sylvestris L. ) stands in Spain based on individual-tree models Marc ... 200 2) Abstract – The article describes a simulation-optimisation system, SPINE, for the management of Pinus sylvestris L. stands in...

Ngày tải lên: 08/08/2014, 01:21

... K.v., Modelling silvicultural and economic alternatives for Scots pine (Pinus sylvestris L. ) plantations in north-western Spain, Forestry 78 (200 5) 385–401. [34] Salminen H., Varmola M., Development of ... stand in the Sistema Ibérico mountain range (Spain) , For. Ecol. Manage. 145 (200 1) 151–161. [25] Palahí M., Pukkala T., Optimising the management of...

Ngày tải lên: 07/08/2014, 16:21

... of maize-Grevillea Robusta fields in Kenya, Agrofor. Syst. 56 (200 2) 13–25. [28] Palahí M., Pukkala T., Optimising the management of Scots pine (P. sylvestris L. ) stands in Spain based on individual-tree ... systematically placed permanent sample plots of the Spanish National Forest Inventory in Catalonia, enables simulations of stand development...

Ngày tải lên: 08/08/2014, 00:21

... simulation-optimisation system, SPINE [19], to examine the effect of risk of fire on the optimal even-aged management of Scots pine (Pinus sylvestris L. ) stands in Catalonia when maximizing soil expectation value (SEV). ... thinning for the other thinnings; remaining basal area. For the final cutting: years since the last thinning to the first regen-...

Ngày tải lên: 08/08/2014, 00:22

... the currently growing timber assort- ments with the potential income possible to obtain An economic aspect of conversion of Scots pine (Pinus sylvestris L. ) stands in the Polish Lowland A. W 1 , ... pine. CONCLUSIONS e analyses carried out on the basis of data con- cerning forests administered by the Regional Direc- torate of the State Forest...

Ngày tải lên: 07/08/2014, 03:22

... 4, 5) consists mainly of a significant peak to less negative d 13 C values in late spring, while there are only minor variations in needle d 13 C during the remainder of the annual cycle. Therefore ... annual ring of each section. This stresses the relationship of bulk needle d 13 C to the wood or cellulose d 13 C of the year during which the needle was formed....

Ngày tải lên: 08/08/2014, 01:21

... transect. Spatio-temporal pattern of bog pine 311 polifolia L. , while Vaccinium myrtillus L. dominated in the driest part (LV3 - bog margin). Sphagnum angustifolium (Russ .) C. Jens and S. fallax (Klinggr .) Klinggr. ... parts, LV1 in the mire centre and LV2 in the intermediate situation. The locations of all trees along the sampling transect were mapped. As th...

Ngày tải lên: 08/08/2014, 01:21

... radial increment of trees in Scots pine (Pinus sylvestris) stands affected by a one-year’s outbreak of pine shoot beetles Tomicus piniperda and T. minor (Col., Scolytidae) in southern Poland. Electron- ic ... have indicated that some quantitative aspects of beetle feeding in Feeding ecology of pine shoot beetles (Tomicus spp .) in tree crowns of Scots...

Ngày tải lên: 07/08/2014, 04:20

... uncondi- tionally (i.e., across all possible realizations of within strata sample sizes), inferences made conditionally on the achieved sample configuration are desirable (V 199 3). e ... evidently estimates (only) the condi- tional variance given the sample allocation n 1 , , n L , what is but completely satisfactory because one is usually interested in the preci...

Ngày tải lên: 07/08/2014, 03:22

... growth of Douglas-fir trees following thinning. Peterson et al. [10] found that loblolly pine trees in thinned stands quickly expanded their crowns horizontally starting the year following thinning ... for loblolly pine trees grown in thinned and unthinned stands by explicitly utilizing the generalized thinning response variable presented later by Liu et al. [7]. The perfor...

Ngày tải lên: 08/08/2014, 00:22