Báo cáo lâm nghiệp: "Germination after heat treatments of Pinus tropicalis Morelet and Pinus caribaea Morelet var caribaea seeds of west Cuban forest" potx

... 10.1051/forest:2006027 Original article Germination after heat treatments of Pinus tropicalis Morelet and Pinus caribaea Morelet var. caribaea seeds of west Cuban forests Jorge D L H a * ,MartaB  b , ... a Figure 1. Average cumulate rate of germination for replicates of 50 seeds of Pinus tropicalis and P. caribaea var. caribaea...

Ngày tải lên: 07/08/2014, 16:20

... “quiescent” to withstand the stress of being held for 14 days of priming at 20 ◦ C. Thus the TMC seeds are also likely to better withstand the stresses of handling and storage than the FI seeds, in agree- ment ... 66−84. Pretreatment of alder and birch seeds 389 Tabl e V. ANOVA of the effects of seed lot, seed moisture content, chilling and priming duration on germinatio...

Ngày tải lên: 07/08/2014, 16:21

... comparisons of means were used to search for statistical differences be- tween the different experimental treatments of either trial. Normal distribution of data and homo- geneity of variances ... tolerance of Quercus robur. After 12 weeks of com- plete inundation only 1 out of the 16 one-year-old seedlings died, compared to 9 out of 20 plants of Fraxinus excelsior...

Ngày tải lên: 07/08/2014, 03:22

... present study was to analyze the germination of some recalci- trant seeds of tropical forest trees, and the effects of dry and wet storage on their via- bility. * New address: ... manner, these seeds can be stored for long periods and their viability can be prolonged at the lowest temperature and moisture content possible. Recalcitrant...

Ngày tải lên: 09/08/2014, 04:20

... skid trail in the natural forest of north of Iran. Combination of two levels of slope < 20% (SC1) and > 20% (SC2) and three levels of traffic (one, five and nine traffics) were studied. Treatment ... In: e Contribution of soil sci- ence to the development of and implementation of criteria and indicators of sustainable sorest management. No. 53, Soil Science Soc...

Ngày tải lên: 07/08/2014, 03:22

... T. amurensis, F. mandshurica, Q. mongolica, A. pseudo-sieboldianum, A. mono and U. japonica), which accounted for 63% of all trees and 91% of the total basal area (Tables 2 and 3). ese percentages ... composition or diversity of primary and logged forests. e lack of knowledge regarding these quantitative charac- teristics of both primary and logged forests is one of...

Ngày tải lên: 07/08/2014, 03:22

... physical density of soil, modu- lus of deformation, density by the difficulty of culti- vation and depth of ruts. Based on the obtained data, plots of dependence of distribution of soil density ... tech- nologies and to widen the network of protected ter- ritories and also to set a number of restrictions on the utilization of certain ways of timber cutting and c...

Ngày tải lên: 07/08/2014, 03:22

... materials 79 latent variable pooled information of variables No. 1, 9, 10 and 11 (Fig. 4). The fundamental frequency amplitude was the orig- inal variable best represented by this latent variable (No. ... parameters of the material [5, 9]. The longitudinal modulus of elas- ticity and the transverse shear modulus can be calculated when the geometry and mass of the test samples ar...

Ngày tải lên: 08/08/2014, 00:22

... system and the grade of heating and wetting of the glued samples. Our findings sup- port the research of Hapla and Fleischhut [20] who reported that the tensile strengths of the PVAC gluelines of ... difference of normal and red-hearted wood of the second sample series (newly developed coatings) in the uncoated state and the coated state before and after 480 h of...

Ngày tải lên: 08/08/2014, 00:22

... traits on the growth rate of seedlings of different species and to determine in which stage of the ontogeny of the different species the maturing of the physiological traits of the leaves occurs could ... assimilation rates of the Q. ilex seedlings were similar to those of the mature trees Figure 1. Some examples of leaf survivorship curves in seedlings and mature trees...

Ngày tải lên: 08/08/2014, 01:21