Báo cáo lâm nghiệp: "Nutrients in the aboveground biomass of

Báo cáo lâm nghiệp: "Nutrients in the aboveground biomass of substitute tree species stand with respect to thinning – blue spruce (Picea pungens Engelm.)" doc

... content in the biomass on the thinned plot represented 8 9–9 2% of the values calculated for the control plot without thinning. On the basis of presented research, which was done within the blue spruce ... years, the investigated substitute blue spruce stand accumulated: N – 336 kg, P – 28 kg, K – 138 kg, Ca – 159 kg, Mg – 28 kg per...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Changes in the mycorrhizal status of some mountain spruce forests" potx

... plots in the Krkonoše Mts. showing that the ﬁrst signs of spruce stands de- struction arose after 1982, and in the ﬁrst half of the 1980s the health conditions of stands gradually wors- ened. In ... In the period after 1988 health improvement and decline of the stands alternated in individual years. In the years 199 6–1 999, several stands within t...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp:"Decline in relative growth rate of 3 juvenile radiata pine clones subjected to varying competition levels in Canterbury, New Zealand" pptx

... partitioning RGR into ULR and LAR, it was evident that the reasons for the decline in RGR for trees growing in weeded treatments were: 1. changes in allometry due to increases in LA in the third growing ... changed with time and tree size in all treatments with the latter being more important than age in influencing RGR changes; 2. RGR decreased in trees in w...

Ngày tải lên : 08/08/2014, 01:21

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Báo cáo lâm nghiệp: "Changes in the abundance of Melolontha hippocastani" ppsx

... with the application of the soil insecticide to the roots of seedlings during planting. At the time of heavy swarming between 9 May and 26 May 2004 in the forest stands of the Lipník local- ity ... dispersed in the oil carrier Dedal 90 EC in a dose of 3.3 l· ha –1 and water in a dose of 6.55 l·ha –1 . e water suspension was dispersed into the...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp:"Water relations and hydraulic characteristics of three woody species co-occurring in the same habitat" pptx

... driving the flow from the soil to the leaf (at midday). In turn, (Y pd – Y x ) in equation 6 would be the driving force for the flow from the soil to the trunk base and (Y x – Y min ) in equation ... L.) in Sicily could be explained in terms of their complementary changes in R root through the year that allowed the peaks of their water demand...

Ngày tải lên : 08/08/2014, 01:21

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Báo cáo lâm nghiệp:" Variation in the decay resistance and its relationship with other wood characteristics in old Scots pines" ppsx

... importance of the individual factors contributing to the natural durability of Scots pine wood. The variation in the in vitro decay rate, and in the extractive content and sorp- tion of water by the ... potential of –0 .1 MPa and, in theory, a relative humidity of Figure 1. The sampling procedure showing the location of the disks and blocks in the...

Ngày tải lên : 08/08/2014, 01:21

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Báo cáo lâm nghiệp: "Variations in growth and virulence of Leptographium wingfieldii Morelet, a fungus associated with the bark beetle Tomicus piniperda L" pot

... replaced to maintain the mycelium and to avoid desiccation of inoculum. In 1994, the inoculations were located in 2 rings per tree at 1.00 and 1.50 m above ground. Within each ring, the inoculations ... contributing to exhaust the resistance of the tree and allowing the success of attacks, the fungi can also contribute to kill the tree by invading and o...

Ngày tải lên : 08/08/2014, 01:22

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Báo cáo lâm nghiệp: "Variation in the composition and content of ellagitannins in the heartwood of European oaks (Quercus robur and Q petraea). A comparison of two French forests and variation with heartwood age" ppt

... within the tree. Due to the rapid decline in soluble tannins ob- served in the first 20 years of heartwood ageing, this might significantly influence the average tannin ... directly or indirectly to dimers. The rapid decline in vescalagin corre- sponds with an increase in concentrations of these dimers. Roburin D (vescalagin- casta...

Ngày tải lên : 08/08/2014, 18:21

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Báo cáo lâm nghiệp: "Arginine and the shade tolerance of white spruce saplings entering winter dormancy" ppsx

... against pathogens, insects, and frost da- mage. During the breaking of dormancy in spring, the removal of inhibitory guanidino compounds provides sources of N for the renewed synthesis of arginine. ... arginine N in the soluble N pool. e accumulation of arginine N indicated that reduced light may have limited the synthesis of N-rich storage proteins. Proteins a...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: " Sicily represents the Italian reservoir of chloroplast DNA diversity of Quercus ilex L. (Fagaceae)" pptx

... – – – –6 – – 6 6 Portella Daini 13.75 37.63 – 1 – –4 – – 5 7 Monte Altesina 14.38 37.63 – 6 – – – – – 6 8 Bosco Adriano 13.37 37.68 – – – –3 – – 3 9 Monte Carcaci 13.45 37.80 – – – –6 – – ... Garda 10.70 45.57 – – – 6– – – 6 44 Duino 13.36 45.77 – – – 6– – – 6 45 Krk 14.30 45.00 – –...

Ngày tải lên : 08/08/2014, 00:21

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Báo cáo lâm nghiệp: "Nutrients in the aboveground biomass of substitute tree species stand with respect to thinning – blue spruce (Picea pungens Engelm )" doc

Báo cáo lâm nghiệp: "Nutrients in the aboveground biomass of substitute tree species stand with respect to thinning – blue spruce (Picea pungens Engelm.)" doc

Báo cáo lâm nghiệp: "Changes in the mycorrhizal status of some mountain spruce forests" potx