scholarly journals Leaf Structural and Photosynthetic Characteristics, and Biomass Allocation to Foliage in Relation to Foliar Nitrogen Content and Tree Size in Three Betula Species

2002 ◽  
Vol 89 (2) ◽  
pp. 191-204 ◽  
Author(s):  
U. NIINEMETS
Keyword(s):  
Nitrogen Content ◽  
Biomass Allocation ◽  
Photosynthetic Characteristics ◽  
Tree Size ◽  
Foliar Nitrogen

scholarly journals Aplicações de glyphosate: Desempenho de soja transgênica, comunidade bacteriana e teor de nitrogênio foliar / Glyphosate applications: Performance of transgenic soy, bacterial community and foliar nitrogen content

2021 ◽  
Vol 7 (10) ◽  
pp. 99306-99322
Author(s):  
Evelin Regina Albano Balastrelli ◽  
Miriam Hiroko Inoue ◽  
Júlia Rodrigues Novais ◽  
Kassio Ferreira Mendes ◽  
Ana Carolina Dias Guimarães ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Nitrogen Content ◽  
Foliar Nitrogen

scholarly journals Effects of Heterogeneous Environment After Deforestation on Plant Phenotypic Plasticity of Three Shrubs Based on Leaf Traits and Biomass Allocation

2021 ◽  
Vol 9 ◽  
Author(s):  
Jinniu Wang ◽  
Jing Gao ◽  
Yan Wu ◽  
Bo Xu ◽  
Fusun Shi ◽  
...  
Keyword(s):  
Phenotypic Plasticity ◽  
Carbon Content ◽  
Nitrogen Content ◽  
Leaf Area ◽  
Biomass Allocation ◽  
Principal Components ◽  
Leaf Traits ◽  
Adaptive Plasticity ◽  
Heterogeneous Environments ◽  
Heterogeneous Environment

Phenotypic plasticity among natural plant populations is a species-specific ecological phenomenon of paramount importance that depends on their life forms, development stages, as well as environmental factors. While this phenomenon is broadly understood, it has hardly been observed in nature. This study aimed at understanding phenotypic plasticity and ecological adaptability in three shrubs (Salix etosia, Rubus setchuenensis, and Hydrangea aspera) affected by potential environmental variables after deforesting in sparse Larix spp. forest and tall shrub mixed secondary forests. Soil organic carbon content, total nitrogen content, and available nitrogen content were greater outside the forests, contrary to other measured factors whose availability was higher in the forest interiors. In case of leaf traits and stoichiometric indicators, there were significant interactions of leaf area (LA), leaf dry matter (DW), specific leaf area (SLA), and leaf phosphorus content (LPC) between shrub species and heterogeneous environments (P < 0.05) but not for leaf C/N, N/P, and C/P. Principal components analysis (PCA) indicated that soil temperature, pH value, soil carbon content, soil nitrogen content, and MBC and MBN mainly constituted the first component. Summarized results indicated that TB and leaf C/P of S. etosia were significantly correlated with three principal components, but only marginal significant correlations existed between R/S and relevant components. SLA and R/S of R. setchuenensis had marginal significant relationships with independent variables. Both SLA and TB of H. aspera were significantly correlated with three principal components. Based on the pooled values of leaf functional traits and leaf stoichiometric indicators, R. setchuenensis (vining type) had better leaf traits plasticity to adapt to a heterogeneous environment. In descending order, the ranks of biomass allocation plasticity index of three shrubs were H. aspera (bunch type), R. setchuenensis (vining type), and S. etosia (erect type). The highest integrated plasticity values of leaf traits and biomass allocation was observed in H. aspera (bunch type), followed by R. setchuenensis, and by S. etosia with less adaptive plasticity in heterogeneous environments.

Five-year growth responses of Douglas-fir, western hemlock, and western redcedar seedlings to manipulated levels of overstory and understory competition

2006 ◽  
Vol 36 (10) ◽  
pp. 2439-2453 ◽  
Author(s):  
Timothy B Harrington
Keyword(s):  
Growth Rate ◽  
Nitrogen Content ◽  
Douglas Fir ◽  
Western Hemlock ◽  
Volume Index ◽  
Stem Volume ◽  
Western Redcedar ◽  
Foliar Nitrogen ◽  
Relative Growth ◽  
Vegetation Control

Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), western hemlock (Tsuga heterophylla (Raf.) Sarg.), and western redcedar (Thuja plicata Donn ex D. Don) seedlings were planted in March 2001 within three clearcut-harvested, shelterwood, or thinned stands of mature Douglas-fir near Olympia, Washington. From 2002 to 2005, areas of vegetation control of 0, 4.5, or 9 m2 were maintained with herbicides around a total 162 seedlings per species. Photosynthetically active radiation (PAR) was 34%, 62%, and 100% of full sunlight in thinned stands, shelterwoods, and clearcuts, respectively. Effects of overstory level and vegetation control on seedling growth and resource availability generally were additive. Seedling stem volume index in clearcuts averaged four to eight times that observed in thinned stands, and with vegetation control, it averaged two to four times that observed without it. In thinned stands, relative growth rate of seedling stem volume index had a positive linear relationship with PAR (R2 = 0.38). Foliar nitrogen content of Douglas-fir explained 71% of the variation in relative growth rate. Factors explaining the most variation in foliar nitrogen content differed between thinned stands (PAR, R2 = 0.34) and clearcuts or shelterwoods (midday water potential, R2 = 0.63), suggesting that light and root competition, respectively, were the primary growth-limiting factors for these overstory levels.

External Supports Affect the Photosynthetic Characteristics and Biomass Allocation of the Climbing PlantHumulus scandens

2015 ◽  
Vol 35 (18) ◽  
Author(s):  
刘金平 LIU Jinping ◽  
游明鸿 YOU Minghong ◽  
张丽慧 ZHANG Lihui ◽  
赵艳 ZHAO Yan
Keyword(s):  
Biomass Allocation ◽  
Photosynthetic Characteristics ◽  
External Supports

scholarly journals Elevated air humidity affects hydraulic traits and tree size but not biomass allocation in young silver birches (Betula pendula)

2015 ◽  
Vol 6 ◽  
Author(s):  
Arne Sellin ◽  
Katrin Rosenvald ◽  
Eele Õunapuu-Pikas ◽  
Arvo Tullus ◽  
Ivika Ostonen ◽  
...  
Keyword(s):  
Biomass Allocation ◽  
Betula Pendula ◽  
Tree Size ◽  
Air Humidity
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