Báo cáo lâm nghiệp: "Relationships between site and stock quality in Pinus halepensis Mill reforestation on semiarid landscapes in eastern Spain" ppsx

... 10.1051/forest:2007052 Original article Relationships between site and stock quality in Pinus halepensis Mill. reforestation on semiarid landscapes in eastern Spain Antonio D.  C a * , Rafael ... performance of Pinus halepensis Mill. In this order, the following questions were addressed: (i) What is the relative in uence between stock quality...

Ngày tải lên: 07/08/2014, 16:21

... 0.05) between the percentage of damaged individuals and dominance. P (1986) found out the nega- tive correlation between damage and dominance for Pinus sylvestris and Populus tremula in ... stands of these two species in Lithuania. D et al. (1991) found higher browsing damage to Pinus sylvestris in mixed stands in Sweden as compared with pure stands or s...

Ngày tải lên: 07/08/2014, 10:21

... correlation between these two param- eters only in the case of spruce trees growing in wa- terlogged sites. In well-drained sites, we determined only a weak and statistically insignifi cant correlation ... growing in waterlogged and in well-drained sites. He found out that the mean value of root plate depth was 45 cm in spruce trees growing in poorly drained sites and...

Ngày tải lên: 07/08/2014, 10:22

... pathogens and environmental constraints as interacting decline inducing factors (PATHOAK). REFERENCES [1] Anonymous, Manual on methods and criteria for harmonised sam- pling, assessment, monitoring and ... three oaks in Filain and two in Ainvelle. In these cases Armillaria was present on a minority of roots, inducing superficial lesions, the root infec- tion index was thus c...

Ngày tải lên: 08/08/2014, 01:21

... for one region can not be used in another one: on the scale of an interregional observation, a sig- nificant portion of branch diameter variance would no longer be explained by stem size and stand ... statistically simple and constitutes a heavy limitation on the model’s robustness. It is caused by four factors: • In living whorls, the differences between the thickest branch an...

Ngày tải lên: 08/08/2014, 01:22

... trade-off between xylem conductance and xylem vulnerability to cavi- tation. 2. MATERIALS AND METHODS 2.1. Study site and plant material Measurements were made in June and July 2000 and 2001 on six species ... were conducted on 3 trees originated from the wet site (arboretum) together with the tree growing under unfavorable conditions in the low mountain stand (La Bast...

Ngày tải lên: 08/08/2014, 01:22

... North and South Finland) were available. The microdensitometric data were classified in age classes of 30 years and ring widths of 1 mm. Only the classes containing data for more than 50 rings and ... of the section and straightness of the ring limits. The selected widths were 3000 µm for Finland spruce, France spruce and France fir; 1500 µm for France pine and South Finland pin...

Ngày tải lên: 08/08/2014, 01:22

... planting —– stocklots were planted following a randomized block design, with 3 blocks, each containing 30 seedlings per stocklot in a row plot (n = 90 seedlings per stocklot and per site) . Site ... (iii) to examine the relationship between RGP and field performance on two contrasting sites. 2. MATERIALS AND METHODS 2.1. Plant material and seedling quality A total of six see...

Ngày tải lên: 07/08/2014, 16:21

... photosynthetic induc- tion and foliage acclimation between two measurements was about 15 min [74] and 5 min, respectively. A non-linear least squares regression (Newton method, ProcNLIN, SAS v.8.1, SAS Institute ... growing under common condi- tions differ in leaf gas exchange regulation, carbon isotope discri- mination and leaf water potential, Oecologia 99 (1984) 297–305. [39] Kin...

Ngày tải lên: 08/08/2014, 00:22

... Population Structure and Genetic Improvement Strate- gies in Clonal and Seedling Forestry; Pattaya, Thailand, November 1988, Oxford Forestry Institute, Oxford and Winrock International, Arlington, ... growth in the cloned parents in com- parison with their open pollinated progeny seedlings. On the other hand, Lambeth et al. [19], in E. grandis and Menck and Table IV. Compa...

Ngày tải lên: 08/08/2014, 00:22