Báo cáo lâm nghiệp: "The effects of elevated CO 2 and water stress on whole plant CO 2 exchange, carbon allocation and osmoregulation in oak seedlings" docx

... 33, 20 1 -21 1 Carbon isotope composition and new carbon allocation Carbon isotope composition of all nonla-belled plants was on average 17&permil; morenegative in plants in ... elevated atmospheric CO 2 concentration and water stress. Moreprecisely, i) carbon allocation (1 3CO 2 labelling) to the different plant componentswas assessed in relation ... concentrations. However, elevated CO 2 concentrations often lead toreduced total mineral ion concentrations in the plant tissues (Conroy, 19 92; Overdieck,1993). The responses of mineral...

Báo cáo lâm nghiệp: "The effects of flooding and Phytophthora alni infection on black alder" pps

... (Spjtvoll-Stoline test).RESULTS AND DISCUSSIONConfirmation of flooding and P. alni infection effects on black aldere analysis of covariance confirmed that the both factors (flooding and P. alni infection) ... leaves con-taining no marks of alteration, disease symptoms or signs of insect grazing and sucking were detached from the plants and rinzed in 95% ethanol (5 sec) and then sterile deionized water ... alni subsp. alni in the flooding and non-flooding condition was Table 1. e effect of long-term flooding and Phytophthora alni infection on the development of black alder saplings Treatment per...

Báo cáo lâm nghiệp: " The effects of cutting regimes on natural regeneration in submountain beech forests: species diversity and abundance" pdf

... 20 03 1989 20 03 1989 20 03 1989 20 03Number of trees/ha 700 627 397 349 24 3 22 6 160 160 0 0Height (m) 23 .6 26 .3 25 .4 28 .6 26 .9 29 .5 27 .7 30.0 – –dbh (cm) 23 .9 27 .6 29 .4 34.5 31.3 38.5 32. 0 41.4 ... group consisting of beech and willow. e results of ANOVA in Table 3 indicate a signiﬁ-cant in uence of diﬀerent cutting operations on the number of all regenerating individuals, of all indi-viduals ... positive on plot M only.Fig. 5 illustrates the in uence of cutting on changes in the species composition of natural regeneration in comparison with the parent stand. e more inten-sive the cutting...

Báo cáo lâm nghiệp: "The effects of thinning on the structural diversity of coppice forests" doc

... pi()ln∑–=x 2 y 2 +dc / 2( ) 2 zhtlc / 2 ()–lc / 2  2 + 1=r 2 x 2 y 2 + dc / 2( ) 2 dc / 2( ) 2 · hhtlc / 2 ()–[] 2 lc / 2( ) 2 –==Viπhi1hi2∫ · r 2 dh=piVjij ... diversity determination is relative to the con-ditions of the area concerned. Considering the growing condi-tions of central and southern Europe, structural diversity gainsa comparatively higher ... the main use. In the longterm, openings improve crown development and acorn produc-tion and can help seedlings to establish [20 ]. The response of the remaining trees to thinning depends on species...

Báo cáo lâm nghiệp: "The effects of lifting on mobilisation and new assimilation of C and N during regrowth of transplanted Corsican pine seedlings. A dual 13C and 15N labelling approach" docx

... concentration neither in seedlingsnor in their components. Time or lifting effects on C:N in thedifferent seedling components were inversely related to those in N concentration.Total carbon ... Changes in partitioning of total, old, and new carbon and nitrogen in various components of intact or lifted one-year-old Cor-sican pine seedlings grown in a controlled climatic chamber during41 ... rates of photosynthesis and a smaller range of N concentration than in non-coniferous species [25 , 32] . Theproportion of leaf N found in Rubisco is known to vary between6 20 % in evergreen conifers...

Báo cáo lâm nghiệp: "The effects of stock type and radicle pruning on blue oak morphology and field performance" docx

... dur-ing the course of the study using a combination of herbicides and mowing. Glyphosate was sprayed on the plot before the study began, and again in the early spring of ... that in 1990.CONCLUSIONThis study indicates that trimming off part of the radicle of germinated blue oak acornsprior to planting has little or no influence on field ... consisted of 360 planting spots, on 1 .2 m centers, within a deer and cattle exclo-sure. The plot layout contained four blocks. Withineach block were ten rows of nine...

Báo cáo lâm nghiệp: "The effects of transplanting stress on photosynthesis, stomatal conductance and leaf water potential in Cedrus atlantica Manetti seedlings: role of root regeneration" pdf

... then on days 2, 9, 16, 23 and 30 after trans-planting. In experiment 2, seedlings were transplanted in minirhizotrons. The plants were given optimalfertilization and the ... parallel decline in both C0 2 assimila-tion and stomatal conductance occurredfrom day 0 to day 9 after transplanting(Fig. 1a and b); afterwards the declinecontinued, but ... trans-planting from day 0 to day 14 (Fig. 3a), and then, from day 14 to day 42, recov-ered its initial value. The start of recovery in A was concomitant to the beginning...

Báo cáo lâm nghiệp: "The effects of summer exposure to ozone on the frost hardiness after the vegetation period of Norway and Sitka spruce seedlings" doc

... temperature and S0 2 + N0 2 pollution on the new season’sgrowth and water relations of Picea sitchensis.New Phytot. 1 O6, 22 5 -23 7Heath R.L. (1980) Initial events in injury toplants ... pollution and cold stress on plants. Environ. Pollut. 43,15 -28 Lucas P.W., Cottam D.A., Sheppard L.J. &Francis B.J. (1988) Growth responses and delayed winter hardening in ... similar concentration of ozone usingthe same fumigation system. In this case,although there was no effect of the pollu-tant on the attainment of deep winter hard-iness,...

Báo cáo lâm nghiệp: "Interactive effects of irradiance and water availability on the photosynthetic performance of Picea sitchensis seedlings: implications for seedling establishment under different management practices" ppt

... both water limited and waterlogged conditions [9, 27 ]. Photosynthesis would alsobe inhibited due to the increased participation of competingpathways and consumption of electrons and reductant in ... usingequation 5 [15]:(5)where Ci is the internal CO 2 concentration, Γ* is the CO 2 compensa-tion point in the absence of mitochondrial respiration and Rd is mito-chondrial respiration in the ... facteurs contrôlant la performance des plants dans les conditionsconventionnelles et de couvert forestier continu (continuous cover forestry, CCF). Les diminutions de la photosynthèse en réponse...

Báo cáo lâm nghiệp: "The results of manipulated experiments with inoculation of Ips typographus (L., 1758) to spruce trees under various levels" potx

... Large area of such stands along with compound of biotic and abiotic stressors (air pollu-tion, degradation and compaction of soil, nutrients exhaustion, increased activity of pests and patho-gens) ... position on slope and on stressed versus unstressed trees;– analysis of I. typographus attacks rate and speed of boring on more stressed versus less stressed trees.METHODOLOGYe eﬀect of water ... non-damaged individuals were tested on motion and than released to rearing cages. ey mated and established new generation. e breeding was con-ducted in natural temperature and light conditions...

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