Physiological and growth responses related to pattern and severity of green pruning in young Eucalyptus globulus

2003 ◽  
Vol 182 (1-3) ◽  
pp. 231-245 ◽  
Author(s):  
E.A. Pinkard
Keyword(s):  
Eucalyptus Globulus ◽  
Growth Responses ◽  
Green Pruning

Effect of fertilizer on wood properties of Eucalyptus globulus

2000 ◽  
Vol 30 (1) ◽  
pp. 136-144 ◽  
Author(s):  
C A Raymond ◽  
A Muneri
Keyword(s):  
Eucalyptus Globulus ◽  
Fibre Length ◽  
Basic Density ◽  
Wood Properties ◽  
Pulp Yield ◽  
Growth Responses ◽  
P Concentration ◽  
Tree Growth Rate ◽  
Western Australian ◽  
P Fertilizers

The effects of N and P fertilizers applied to Eucalyptus globulus Labill. at plantation establishment on basic density, fibre length, fibre coarseness, predicted pulp yield, and N and P concentration in the wood were examined by sampling four fertilizer factorial trials: three in Victoria and one in Western Australia. Treatments sampled were control, maximum levels of N and P by themselves and combined. Growth responses varied across sites with significant growth responses at the Victorian sites but no response at the Western Australian site. An interaction was suggested between rainfall and the effects of the fertilizer; wood properties at the drier sites were detrimentally affected by fertilizer but there was little effect at the wetter sites. On the two drier sites, application of both N and P, alone or in combination, resulted in changes in density, shorter fibres, and slightly lower predicted pulp yield. Addition of both N and P increased the levels of these nutrients in the wood at the three Victorian sites. Changes occurred in wood properties in the absence of growth responses to the applied fertilizer indicating that these changes were not induced by changing tree growth rate.

scholarly journals Application of hypergravity in Eucalyptus and Corymbia seeds

2018 ◽  
Vol 48 (2) ◽  
Author(s):  
Andrei Caíque Pires Nunes ◽  
Glêison Augusto dos Santos ◽  
Marlise Araújo dos Santos ◽  
Thais Russomano ◽  
Osmarino Pires dos Santos ◽  
...  
Keyword(s):  
Eucalyptus Globulus ◽  
Rio Grande ◽  
Performance Tests ◽  
Seedling Production ◽  
Rio Grande Do Sul ◽  
Growth Responses ◽  
Stages Of Development ◽  
Eucalyptus Saligna ◽  
Eucalyptus Dunnii ◽  
Plastic Containers

ABSTRACT: The aim of this study was to evaluate the growth responses of various Eucalyptus and Corymbia species subjected to different intensities of simulated hypergravity relative to the control. A centrifuge was used to simulate hypergravity. It was developed and built at the Centro de Microgravidade of the Pontifícia Universidade Católica do Rio Grande do Sul, Brazil. Seeds of five Eucalyptus and one Corymbia species (E. grandis, Eucalyptus globulus, Eucalyptus benthamii, Eucalyptus saligna, Eucalyptus dunnii, and C. maculata) were placed on moist germination paper in plastic containers and rotated at speeds simulating 5 Gz and 7 Gz for different lengths of time. Hypergravity technology significantly increased seedling production (diameter, height, and survival at 120 days) in nurseries. In E. globulus, the effects of hypergravity were significant at 7 Gz at all lengths of time (from 1 d to 9 days). Effects of hypergravity were significant in both E. benthamii and E. grandis at 7 Gz and 8 h exposure. Therefore, simulated hypergravity could be used in performance tests of Eucalyptus seedlings in early stages of development.

Developing a general method for the estimation of the fertility rating parameter of the 3-PG model: application in Eucalyptus globulus plantations in northwestern Spain

2013 ◽  
Vol 43 (7) ◽  
pp. 627-636 ◽  
Author(s):  
Daniel J. Vega-Nieva ◽  
Margarida Tomé ◽  
José Tomé ◽  
Luís Fontes ◽  
Paula Soares ◽  
...  
Keyword(s):  
Soil Nutrients ◽  
Eucalyptus Globulus ◽  
Sustainable Forest Management ◽  
Forest Growth ◽  
Growth Responses ◽  
Nutrient Contents ◽  
Modeling Approaches ◽  
Northwestern Spain ◽  
Forest Managers ◽  
General Method

Simple, operational tools are required for forest managers to quantify the effects of soil fertility on tree growth and ecosystem sustainability leading to precise, sustainable forest management. The simplified process-based 3-PG model (Landsberg, J.J., and Waring, R.H., For. Ecol. Manage. 95: 209–228, 1997) provides a useful framework for operational prediction of forest growth. However, no simple objective method for relating the effects of available soil nutrients to the model fertility parameter fertility rating (FR) is yet available. The present study aimed to compare several general modeling approaches for the estimation of FR values from soil relative nutrient contents (RNCs) to maximum nonlimiting values, measured in the whole soil profile, at continuous inventory plots of Eucalyptus globulus Labill. in several locations under different parent materials in northwestern Spain. The modeling approaches tested provided good predictions of FR values from RNCs. In particular, using the minimum value of the most significant RNCs showed considerable potential for modeling FR values and plantation growth responses to them. This modeling approach showed promise to be further tested as a generally applicable strategy for estimating the effect of soil nutrients on forest plantations growth.

Growth responses to thinning and pruning in Eucalyptus globulus, Eucalyptus nitens, and Eucalyptus grandis plantations in southeastern Australia

2012 ◽  
Vol 42 (1) ◽  
pp. 75-87 ◽  
Author(s):  
David I. Forrester ◽  
Thomas G. Baker
Keyword(s):  
Tree Growth ◽  
Eucalyptus Globulus ◽  
Eucalyptus Grandis ◽  
Eucalyptus Nitens ◽  
Growth Responses ◽  
Southeastern Australia ◽  
Crown Length

Growth responses to pruning or thinning are well documented but their interactions are not, even though they are sometimes performed simultaneously. Growth responses to thinning and pruning were examined in nine plantation silvicultural experiments at five sites in southeastern mainland Australia. The species studied were Eucalyptus globulus Labill., Eucalyptus nitens (Deane and Maiden) Maiden, and Eucalyptus grandis Hill ex Maiden. Thinning from about 1100–1300 trees·ha–1 to about 300 or 500 trees·ha–1 at either age 3–4 years or 7–10 years increased the volume of sawlog crop trees in all species. Multiple lift pruning to 6.5 m height on the sawlog crop trees that retained at least 70% of the live crown length at any lift significantly reduced tree growth at only one of the six site–species combinations where both thinning and pruning were studied. And here, thinning interacted with pruning such that the pruning effects were not significant in unthinned stands because only shaded and inefficient foliage was removed. This study shows that thinning and pruning can interact to influence sawlog crop tree growth and this interaction is influenced by site.

Growth responses, physiology and decay associated with pruning plantation-grown Eucalyptus globulus Labill. and E. nitens (Deane and Maiden) Maiden

2004 ◽  
Vol 200 (1-3) ◽  
pp. 263-277 ◽  
Author(s):  
E.A. Pinkard ◽  
C. Mohammed ◽  
C.L. Beadle ◽  
M.F. Hall ◽  
D. Worledge ◽  
...  
Keyword(s):  
Eucalyptus Globulus ◽  
Growth Responses

Growth responses of Eucalyptus globulus Labill. to nitrogen application and severity, pattern and frequency of artificial defoliation

2006 ◽  
Vol 229 (1-3) ◽  
pp. 378-387 ◽  
Author(s):  
E.A. Pinkard ◽  
C.C. Baillie ◽  
V. Patel ◽  
S. Paterson ◽  
M. Battaglia ◽  
...  
Keyword(s):  
Eucalyptus Globulus ◽  
Nitrogen Application ◽  
Growth Responses

Prebleaching of eucalypt kraft pulp with OP stages: Effect of an acid pretreatment or chelation step

TAPPI Journal ◽  
2012 ◽  
Vol 11 (6) ◽  
pp. 31-38
Author(s):  
TATIANA M. PÓVOAS ◽  
DINA A.G. ANGÉLICO ◽  
ANA P.V. EGAS ◽  
PEDRO E.G. LOUREIRO ◽  
LICÍNIO M. GANDO-FERREIRA ◽  
...  
Keyword(s):  
Eucalyptus Globulus ◽  
Comparative Evaluation ◽  
Kraft Pulp ◽  
Kraft Pulps ◽  
Acid Pretreatment ◽  
High Brightness ◽  
Pulp Viscosity ◽  
Brightness Reversion

We conducted a comparative evaluation of different treatments for the bleaching of eucalypt kraft pulps beginning with OP stages. The treatments tested were (1) an acid chelation stage with DTPA (OQP sequence); (2) a hot acid stage (AOP sequence); and (3) a chelant addition into the alkaline oxygen stage ((OQ)P and A(OQ)P sequences). The latter strategy was also studied for environmental reasons, as it contributes to the closure of the filtrate cycle. The OQP sequence leads to the highest brightness gain and pulp viscosity and the lowest peroxide consumption caused by an efficient metals control. Considering that the low biodegradability of the chelant is a problem, the A(OQ)P sequence is an interesting option because it leads to reduced peroxide consumption (excluding OQP) while still reaching high brightness values and similar brightness reversion to OQP prebleaching, with only a viscosity loss of 160 dm3/kg. Therefore, a hot acid stage could be considered when a separate acid Q stage is absent in a prebleaching sequence of Eucalyptus globulus kraft pulps involving OP stages.

MICROPROPAGATION OF CHICKPEA FROM SHOOT TIP AND NODE SEGMENT

2018 ◽  
Vol 24 (2) ◽  
Author(s):  
J. D. BARSHILE
Keyword(s):  
Shoot Tip ◽  
Root Induction ◽  
Multiple Response ◽  
Ms Medium ◽  
Growth Responses ◽  
Rapid Multiplication ◽  
Micro Propagation ◽  
G 12 ◽  
Better Than

Present investigation was undertaken to standardize technique for in vitro micro-propagation of chickpea( Cicer arietinum ) cultivar Vishwas (Phule G 12). Micropropagation method for chickpea was established and this method enabled much more efficient propagation of plants. The present work was aimed at evolving a protocol for rapid multiplication of chickpea using micropropagation technique. Explants from shoot tip and node segment were cultured on MS medium supplemented with different concentrations of BAP and Kinetin (1.0 to 2.5 mg/l) and their growth responses like shooting were elucidated. The maximum multiple response was observed with 2 mg/l concentration of BAP from both types of explant. The highest number of shoots (12.5 ± 0.3) was achieved on MS medium with 2 mg/l BAP using node segments. The medium supplemented with 2 mg/l of BAP was found better than all other concentrations. Individual shoots were transferred to IBA and IAA (1.0-1.5 mg/l) for root induction. MS medium supplemented with 2 mg/l of IBA proved better for rooting. Rooted plantlets were successfully hardened in greenhouse and established in the pot.

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