Báo cáo lâm nghiệp:"The extreme drought in the 1920s and its effect on tree growth deduced from tree ring analysis: a case study in North China" ppsx
Báo cáo lâm nghiệp:"The extreme drought in the 1920s and its effect on tree growth deduced from tree ring analysis: a case study in North China" ppsx
... around the typical steppe. Thus, a tree- ring database covering a broad range of spatial and temporal scales may provide an alterna- tive approach to assess and understand the stand dynamics of the ... Gansu, Shaanxi, Inner Mongolia, Ningxia Qinghai [54], demonstrating to the intensity and severity of the drought in the 1920s in North China. Archives also de...
Ngày tải lên: 08/08/2014, 01:21
Báo cáo lâm nghiệp:"Interaction of initial seedling diameter, fertilization and weed control on Douglas-fir growth over the first four years after planting" ppsx
... Ketchum vegetation control treatment and stayed the dominant into year four. The three-year vegetation control treatment greatly reduced the dominance of false dandelion and increased the importance ... classes occurred in either year one or two (Tab. V). The fertilization treatments resulted in an increase in first-year N and B concentrations and decreases in P and...
Ngày tải lên: 08/08/2014, 01:21
Báo cáo lâm nghiệp: "Impact of drought and Hypoxylon mediterraneum on oak decline in the Mediterranean region" ppt
... composition occurring in the last decade in central and southern Italy are paralleled by changes in rainfall distribution. H mediterraneum seems to play a role in such modifications ... Mill on Quer- cus cerris L in central and southern Italy (Vannini and Scarascia Mugnozza, 1991; Vannini and Valentini, 1994). During the last decade, dec...
Ngày tải lên: 08/08/2014, 18:21
Báo cáo lâm nghiệp: "Spatio-temporal patterns of the Norway spruce decline in the Beskid Śląski and Żywiecki (Western Carpathians) in southern Poland" pot
... site and stand-related hazards of bark beetle infestation in the High Tatra Mountains as an example for system application and verification. Forest Ecology and Management, 207: 99–107. SAUVARD ... basic area units. e assessment of the bark beetle occurrence was based on the mean volume of infested (standing and lying) trees removed an- nually from 1 ha of stands. e c...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: " Web-spinning sawflies of the genus Cephalcia Panzer (Hymenoptera, Pamphiliidae) in the Picea abies forests of the Beskidy Mountains (Poland)" pptx
... the taxonomic problem by find- ing appropriate traits differentiating C. fallenii and C. lariciphila, and treated the other connected names of web-spinning sawflies as synonyms, the name C. alpina ... 175 C. alpina 0 1,092 C. alpina 0 1981 294 C. abietis/alpina 0 117 C. alpina 0 646 C. alpina 0 1982 382 C. abietis/alpina 421 131 C. alpina 0 1,150 C. alpina 0 1983 428 C. abietis/alpi...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Intensively fertilised seedlings of the beech (Fagus sylvatica L.) for artificial regeneration of the spruce stands in the process of conversion" pdf
... control treatment (application of foliar nutrition only), they all achieved the parameters of established plantation in the same time interval (in 4 th year after planting), – the equalisation ... treatment variants including the control satisfy the criteria of an estab- lished plantation. At the time of planting, i.e. after growing in the nursery, the planting mate...
Ngày tải lên: 07/08/2014, 04:20
Báo cáo lâm nghiệp: "Some methodological aspects of the National Forest Inventory and Monitoring in Slovakia" pptx
... no), and in the case of the beech also the age and growth area (flysch). In the outputs of the Slovak NFIM, aggregated assortment types will be used, and for monitoring the changes in the quality ... subplots, resulting in a variable area of the sample units. Estimation of parameters of the stand quantitative variable Let us assume that we evaluate th...
Ngày tải lên: 07/08/2014, 04:20
Báo cáo lâm nghiệp: "Extended length rotation to integrate timber and pine nut production with the conservation of structural diversity in a Pinus pinea (L.) forest" pdf
... samples u a and u a + d which distance from each other is within the distance lag cen- tred at d ,andz(u a )andz(u a +d) are the values that the variable z takes at samplesu a and u a + d. The experimental ... considering that the rot infection degree is much higher at age of 120 than at the age of 80. In the other hand, mean annual cone production increases...
Ngày tải lên: 07/08/2014, 16:20
Báo cáo lâm nghiệp: "Salicylic acid up-regulates the expression of chloroplastic Cu, Zn-superoxide dismutase in needles of maritime pine (Pinus pinaster Ait.)" pptx
... causing a condition of rapid soil erosion. Mar- itime pines have also been extensively used in setting dunes as a way of preventing sand invasion on agricultural and urban fields. By the beginning ... structurally unrelated to the remaining groups; most of them form an homodimer and each subunit binds a copper and zinc ion [12]. In plants, Cu,Zn- SODs are mainly located...
Ngày tải lên: 08/08/2014, 01:22
Báo cáo lâm nghiệp: "Ophiostomatoid fungi associated with the spruce bark beetle, Ips typographus, in three areas in France" docx
... by grants from Konkordialiitto and the Halonen Foundation. We thank Jacques Garcia and Eeva Vehviläinen for technical assistance, Marja Poteri for comments on the manuscript and Joann von Weissenberg ... individuals and in Fin- land, Valkama et al. [37] caught at most 14 000 individuals per season with a group of three traps during a period when the beetle population w...
Ngày tải lên: 08/08/2014, 01:22