Báo cáo lâm nghiệp: "Eﬀect of Melampsora larici-populina on

Báo cáo lâm nghiệp: "Eﬀect of Melampsora larici-populina on growth and biomass yield of eight clones of Populus nigra" ppsx

... intensity of Melampsora larici-populina occurrence and the value of growth traits and biomass yield in Populus nigra  e correlation between the growth traits of stem diameter and plant height and ... some clones (clones 7 and 107) no yield decline was observed at all or it ranged only from 6% to 9% (clones 49 and 152). It is to note that clone 107...

Ngày tải lên : 07/08/2014, 10:21

9
523
0

Báo cáo lâm nghiệp: "Eﬀect of species composition, stand density and site index on the basal area increment of oak trees (Quercus sp.) in mixed stands with beech (Fagus sylvatica L.) in northern France" potx

... results of Deleuze et al. [8] and Dhôte [9, 13] on pure beech, oak, and Douglas ﬁr stands to mixed-species stands of oak and beech. The aim of the study was to adapt one of the basic equations of ... information on the experiments and abbreviations is shown in Tables I and II. A detailed description of stand growth and yield parameters is provided in Pardé [40]...

Ngày tải lên : 07/08/2014, 16:20

11
422
0

Báo cáo lâm nghiệp: "Eﬀect of leaf biomass and phenological structure of the canopy on plot growth in a deciduous hardwood forest in northern Japan" pot

... corresponds to produc- tion. Regression was able to separate the eﬀects of leaf biomass and BA on gross growth because leaf biomass was estimated indepen- dently of BA, and changes in leaf biomass ... those in BA, corresponding to outbreaks of insect herbivores. In undisturbed stands, leaf biomass is often proportional to BA [23], so the eﬀects of leaf biomass and...

Ngày tải lên : 07/08/2014, 16:20

8
347
0

Báo cáo lâm nghiệp: "Eﬀect of tree species substitution on organic matter biodegradability and mineral nutrient availability in a temperate topsoil" pptx

... beech plantations. The F2 axis was determined by WEOC and NH 4 -N on one hand, and by pH, Ca and Fe, on the other hand. It opposed soils under spruce and native forest; those under beech and Douglas ... eﬀect of tree species on organic matter biodegradability and consequently on mineral element and major nutriments release and availability. The results showed that...

Ngày tải lên : 07/08/2014, 16:20

9
368
0

Báo cáo lâm nghiệp: "Eﬀect of single Quercus ilex trees upon spatial and seasonal changes in soil water content in dehesas of central western Spain" potx

... were cut and weighted every 20 cm, and aliquots were taken for the determination of θ,inorder to get the dry weight of soil. A total of 1290 determinations were done. Aliquots of three randomly ... determine the eﬀects of isolated Q. ilex trees on both vertical and horizontal soil water content distribution, in semi- arid conditions (ii) to study the seasonal patterns of s...

Ngày tải lên : 07/08/2014, 16:21

10
459
0

Báo cáo lâm nghiệp: "Eﬀect of an oil heat treatment on the leachability and biological resistance of boric acid impregnated wood" pps

... aqueous solution as follow and then sterilized by autoclave: for White rot fungi, 85 mL of a solution containing 40 g of glucose, 3 g of peptone, 15 g of malt extract and 1 000 mL of distilled ... Hamilton S.J., Buhl K.J., Acute toxicity of boron, molybdenum and selenium to fry of Chinook salmon and Coho salmon, Arch. Environ. Contam. Toxicol. 19 (1990) 366–373. [8] Jans...

Ngày tải lên : 07/08/2014, 16:21

6
417
0

Báo cáo lâm nghiệp: " Eﬀect of species and ecological conditions on ellagitannin content in oak wood from an even-aged and mixed stand of Quercus robur L. and Quercus petraea Liebl." docx

... of Ordovician red sandstone. The mean el- evation of the stand is 140 m. The stand is included in a continuous forest of 700 ha, consisting mostly of naturally regenerated stands of sessile and ... B, C and E. Moreover one can observe a negative correlation between castalin, vescalin and ellagic acid content and the percentage of vescalin, castalin, roburin A and C on...

Ngày tải lên : 08/08/2014, 00:22

10
253
0

Báo cáo lâm nghiệp: "Eﬀects of microsite variation on growth and adaptive traits in a beech provenance trial." pps

... substantial portion of the trait variation is caused by genetic variation within populations and/ or environmental variation on very small scales. Analysis of covariance confi rmed the expected ... variation of environment aff ects growth and adaptive traits in a provenance trial, and whether blocking can effi ciently handle this variation. MATERIALS AND METHODS  e study is b...

Ngày tải lên : 07/08/2014, 10:21

8
364
0

Báo cáo lâm nghiệp: "Eﬀects of drought and heat on forest insect populations in relation to the 2003 drought in Western Europe" ppt

... rate of develop- ment, population growth, phenology and voltinism. This ques- tion remains one of the most outstanding that prevent from predicting the long term impacts of climate change on forest insect ... water content and increased concentrations of sec- ondary metabolites (e.g. [45,79, 80]). The net eﬀect of water stress on insect populations is often hard to grasp be...

Ngày tải lên : 07/08/2014, 16:20

12
452
0

Báo cáo lâm nghiệp: "Eﬃciency of early selection for rotation-aged wood quality traits in radiata pine" pdf

... INTRODUCTION Considerable research has been conducted on age-age genetic correlation and eﬃciency of early indirect selection in conifers. Most studies were focused on age-age correlation of the ... ages for both MFA and MOE. 4. DISCUSSION AND CONCLUSIONS Study of early selection eﬃciency involves estimation of genetic parameters across ages. To estimate genetic variance...

Ngày tải lên : 07/08/2014, 16:20

9
383
0