Báo cáo lâm nghiệp: "Growth and nutrition of container-grown ponderosa pine seedlings with controlled-release fertilizer incorporated in the root plug" docx
Báo cáo lâm nghiệp: "Growth and nutrition of container-grown ponderosa pine seedlings with controlled-release fertilizer incorporated in the root plug" docx
... CONCLUSIONS Controlled-release fertilizer placed in the container at the time of sowing increased diameter, needle, stem and total bio-mass of ponderosa pine seedlings at lifting in the greenhouse. Seedlings with controlled-release ... investigate the applicability of a number of different controlled-release ferti-lizer products. The fertilizers were either applied into the root plug of containerized ponderosa pine stock in ... (8 seedlings per replicate). At lifting (December 1,1996), these seedlings were then cut at the root collar, and the root sys-tem was extracted from the container and hand washed. The shoot...
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Báo cáo lâm nghiệp: " Growth and mineral content of young chestnut trees under controlled conditions of nutrition" ppsx
... B. The concentration of K decreased with the addition of fertilizer (fig 2c). The K levels increased in 1995 in O and A and remained constant for the oth-ers. The highest ... measurement. The temperature varied from a minimum of 2 °Cduring the winter to a maximum of 45 °C in the summer. Being protected against rain fall, the trees were watered with ... expressed as the mean of 20 individual values at the begin-ning of the study, to 10 individual values at the end, and the Mann and Whitney U test (1947)was applied with a...
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Báo cáo lâm nghiệp: "Growth and physiological state of beech seedlings grown in a nursery in different light conditions" docx
... lower after 30 days than in the leaves of plants left in the shade and in control seedlings growing in the gap.Photoinhibition in beech seedlings grown in the shade and transferred to full ... beech seedlings growing in the open area, higher values in the gap and the highest values in seedlings growing under shelterwood, ex-plained these diff erences by increased photoinhibi-tion in ... area and higher dry matter of leaves per 1 plant were de-termined in seedlings grown in the sun. The average area of one leaf was larger in seedlings grown in the shade. The higher photosynthetic...
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Báo cáo lâm nghiệp:"Growth and biomass partitioning of Fagus sylvatica L. and Quercus robur L. seedlings in response to shading and small changes in the R/FR-ratio of radiation" pot
... diameter and diameter at half length (in cm respectively)) and the dry mass of the main stem (DMshoot) at the end of the experiment, the dry mass of the main stem at the start of the experiment and ... selectedaccording to the law on forest reproductive material. The seeds weresown into a permeable pot of 2000 cm3 in size and the seedlings stayed there to the end of the experiment. The rooting substrateconsisted ... for theirassistance in constructing the wooden frames of the nets and measuring the seedlings. I also thank K. Thoroe for measuring the drymasses of the harvested seedlings and two anonymous reviewers...
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Báo cáo lâm nghiệp: "Growth and yield model for uneven-aged mixtures of Pinus sylvestris L. and Pinus nigra Arn. in Catalonia, north-east Spain" pptx
... Growth and yield model for pine mixtures 15increasing elevation increases the growth of a P. nigra tree. The signs of coefficients of the plot factor model of P. nigrawere logical, bearing in mind ... G., Site index estimation in Scots pine (Pinussylvestris L.) stands in the High Ebro Basin (northern Spain) usingsoil attributes, For. 74 (2001) 395–406.[3] Cajander A.K., The theory of forest ... (9)) and the mean dbh of ingrowthfor both pine species (Eqs. (10) and (11)); increasing values of the ratio of the subject species’ basal area to the total stand basalarea increases ingrowth...
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Báo cáo lâm nghiệp: "Growth and litter decomposition of woody species inoculated with rhizobia and arbuscular mycorrhizal fungi in Semiarid Brazil" ppsx
... capable of fixing the atmospheric nitrogen in root nodules, can guarantee nitrogen supply to the leguminoustree, making it independent of the nitrogen in the soil. The access of the roots to the ... month-old seedlings were transplanted in the field during the rainy season.To ensure the survival of the seedlings, irrigation with truck were pro-vide during the dry season of the first year ... volume, which in turnincreases the water-holding capacity of the soil [2, 44] enhanc-ing drought tolerance and survival of plants and bacteria [1, 28].On the other hand, the A. peregrina growth...
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Báo cáo lâm nghiệp: "Structure and development of forest stands on permanent research plots in the Krkonoše Mts" pdf
... dynamics of beech, mixed (fi r beech and spruce beech stands) and spruce stands, relict pine woods and stands in the ecotone of the upper forest limit in diff erent site, stand, air-pollution and ... in- dices used in the study. The horizontal structure of the forest stand was from the first year of ob-servation till 2010 random; in following years the stand tends to more aggregation. The spatial ... (2006): Modelling the structure and development of forest stands using the growth simulator SIBYLA. In: V S. (ed.): Increasing the Ratio of Close-to-Nature Structures of Forests with Special...
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Báo cáo lâm nghiệp: "Extent and distribution of beech (Fagus sylvatica L.) regeneration by adult trees individually dispersed over a spruce monoculture" ppsx
... frame, the height of individuals in the main layer (they are not visibly dominant, nor are they suppressed) and finally the thickness of the root collar to the nearest 0.1 mm. In the case of “Telc” ... it was the height and thickness of the root collar of sample regenerated individuals selected from within the fencing and outside of it.e basic spatial statistic of the point layer of re-generated ... determined by the width of the crown, section 2 by the span of the distance from the trunk circumference to the breakpoint of the curve. From this point in section 3 the curve trend continuously...
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Báo cáo lâm nghiệp: "Productivity and cost of manual felling with a chainsaw in Caspian forests" pptx
... the production and cost of other harvesting machines or systems used in the region and will be helpful for the loggers in selecting an appropriate system under certain stand and harvest circumstances.e ... using manual harvesting systems have been conducted in harvesting planted pine stands in the south. K- and S (1994) conducted a time study on a southern pine harvest consisting ... stand with the average growing stock 320 m3/ha. e slope of the compartment was 20 to 60% and the aspects of the slopes were northern. e total volume of production was 1,900 m3 and the...
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Báo cáo lâm nghiệp: "Quantity and distribution of fine root biomass in the intermediate stage of beech virgin forest Badínsky prales" potx
... depends on the other quantita-tive characteristics of fine roots, particularly on their length. With the increasing value of the fine root length the number of root tips increases as well. Therefore ... slightly with the soil depth (Table 4). These fi-nest roots bear a dominant amount of root tips and therefore the decrease in the root tip number with increasing soil depth is faster than in the ... length and the soil depth and it has almost a linear character in the mineral soil. e comparison of the amounts of explained variance (r2) and the parameters of the linear and nonlinear...
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