scholarly journals Modelling the Effect of Microsite Influences on the Growth and Survival of Juvenile Eucalyptus globoidea (Blakely) and Eucalyptus bosistoana (F. Muell) in New Zealand

Forests ◽  
2019 ◽  
Vol 10 (10) ◽  
pp. 857
Author(s):  
Salekin ◽  
Mason ◽  
Morgenroth ◽  
Bloomberg ◽  
Meason
Keyword(s):  
New Zealand ◽  
Resource Competition ◽  
Surface Profile ◽  
Height Growth ◽  
Eucalyptus Species ◽  
Growth And Survival ◽  
Silvicultural Treatments ◽  
Wind Exposure ◽  
Plantation Yield ◽  
Survival Proportion

The effect of microsite on juvenile forest plantation yield is rarely explored. This is because juvenile plantation growth is considered to be reasonably homogenous due to a lack of resource competition between trees prior to canopy closure. However, models of juvenile plantation height growth and survival that are sensitive to microsite variation could aid decisions relating to site preparation, plantation establishment and early silvicultural treatments. In this study, juvenile Eucalyptus bosistoana and E. globoidea height growth and survival proportion were modelled against topographic and environmental microsite characteristics as independent variables. The experiment included three different sites situated in a sub-humid region of New Zealand. A total of 540 plots were planted with 18,540 trees in regular rows and columns. Micro-topographical variables significantly influenced height growth and survival proportion of both E. bosistoana and E. globoidea, but species differed in their responses. More sheltered microsites yielded greater height growth and survival for both species. The height of both species was influenced by wind exposure, morphometric protection, and distance from the nearest ridge. E. bosistoana height was also influenced by topographic position and surface plan curvature. Survival was affected by surface profile curvature for both species, while E. globoidea survival was also impacted by surface plan curvature and distance from the top ridge. This study identified microsite factors influencing juvenile height and survival of two Eucalyptus species.

Hybrid height growth and survival model for juvenile Eucalyptus globoidea (Blakely) and E. bosistoana (F. Muell) in New Zealand

2021 ◽  
Vol 490 ◽  
pp. 119074
Author(s):  
Serajis Salekin ◽  
Euan G. Mason ◽  
Justin Morgenroth ◽  
Mark Bloomberg ◽  
Dean F. Meason
Keyword(s):  
New Zealand ◽  
Height Growth ◽  
Survival Model ◽  
Growth And Survival

Growth and Survival of Eastern Cottonwood in Kentucky

1987 ◽  
Vol 11 (2) ◽  
pp. 73-76 ◽  
Author(s):  
J. W. Stringer ◽  
L. Shain ◽  
R. F. Wittwer
Keyword(s):  
Populus Deltoides ◽  
Early Growth ◽  
Height Growth ◽  
Growth And Survival ◽  
Eastern Cottonwood ◽  
Survival Percentage ◽  
Stem Cankers ◽  
Geographic Sources ◽  
Superior Clones

Abstract Nine clones of eastern cottonwood (Populus deltoides Bartr.) from different geographic sources were grown on two sites for height growth and survival percentage after 5 to 10 years. Several clones ranked as superior in Mississippi also performed well during the first 5 years of growthin Kentucky. The survival and diameter growth of some of these "superior" clones, however, was significantly less than others at 10 years. These same clones also exhibited low crown vigor and an abundance of stem cankers associated largely with Fusarium solani. Early growth induces must thereforebe used cautiously for determining long-term planting schedules. South. J. Appl. For. 11(2):73-76.

Artificial Regeneration of Baldcypress in a Louisiana Crayfish Pond

1993 ◽  
Vol 17 (1) ◽  
pp. 54-57 ◽  
Author(s):  
William H. Conner ◽  
John R. Toliver ◽  
George R. Askew
Keyword(s):  
Cold Storage ◽  
Height Growth ◽  
Planting Date ◽  
Taxodium Distichum ◽  
Multiple Use ◽  
Artificial Regeneration ◽  
Growth And Survival ◽  
Containerized Seedlings ◽  
Bareroot Seedlings ◽  
Better Than

Abstract Baldcypress (Taxodium distichum [L.] Rich.) seedlings were planted in a Louisiana crayfish pond to evaluate the effect of planting date on growth and survival. Storage techniques also were evaluated against containerized seedlings to determine the best method of holding seedlings fordelayed plantings. Seedlings planted in February had better survival and grew better than seedlings planted in July. Cold storage of bareroot seedlings was superior to tub storage or containerization for both survival and height growth. Planting baldcypress seedlings in crayfish ponds representsa viable multiple-use alternative for aquaculture operations. South. J. Appl. For. 17(1):54-57.

A study on the height growth of different Eucalyptus species in India

2018 ◽  
Vol 27 (1) ◽  
pp. 293-310
Author(s):  
Dimpal Jyoti Mahanta ◽  
Pallabi Saikia ◽  
Abhijit Chetia
Keyword(s):  
Height Growth ◽  
Eucalyptus Species

Recruitment of tall arborescent palms in the Yasuní National Park, Amazonian Ecuador: are large treefall gaps important?

1999 ◽  
Vol 15 (3) ◽  
pp. 355-366 ◽  
Author(s):  
J.-C. Svenning
Keyword(s):  
Common Species ◽  
Height Growth ◽  
Phase 3 ◽  
Growth And Survival ◽  
Treefall Gaps ◽  
Yasuni National Park ◽  
Light Requirements ◽  
Palm Species ◽  
Amazonian Ecuador ◽  
Using Data

An evaluation of whether large arborescent palms depend on large treefall gaps for recruitment to the adult stage is reported. Specifically three hypotheses were tested: (1) The light requirement of juveniles of tall arborescent palms increases as they grow in size. (2) Tall arborescent palms depend on gaps over 0.10 ha for growth and survival to maturity, due to high light requirements during the stem height growth phase. (3) Stilt-rooted palms are not dependent on gaps for juvenile height growth. The hypotheses were evaluated using data on size and crown position of individuals of tall arborescent palm species as well as data on the forest-phase in which each individual grew. The study site was a 50-ha plot in old-growth rain forest in Amazonian Ecuador. The first hypothesis was accepted for the two most common species, Iriartea deltoidea and Oenocarpus bataua, but tentatively rejected for the arborescent palm community as a whole. The second hypothesis was rejected for Iriartea and the community as a whole. Only Oenocarpus had strongly gap-dependent recruitment. The results for Iriartea and Oenocarpus were consistent with the third hypothesis.

Effects of sowing time and container type on height growth and survival of seedlings of Eucalyptusregnans

1979 ◽  
Vol 9 (4) ◽  
pp. 478-483
Author(s):  
J. D. Kellas ◽  
J. G. Edgar
Keyword(s):  
Height Growth ◽  
Late Winter ◽  
Seedling Height ◽  
Minimum Standard ◽  
Sowing Time ◽  
Growth And Survival ◽  
Percentage Survival ◽  
Stems And Leaves ◽  
Container Type ◽  
Survival Of Seedlings

The height growth and survival of E. regnans F. Muell. seedlings raised in six container types following sowings made at six different times were studied in the nursery and 14 months after outplanting. Seedling height growth during the nursery stage was directly related to container volume and was modified by cold hardening of stems and leaves. Time of sowing influenced survival of outplanted seedlings; however, percentage survival generally satisfied the minimum standard of 1000 trees/ha. The seedlings raised in Jiffy pot 522 (33 mL) were significantly smaller than seedlings raised in Paperpot FH415S (170 mL), Jiffypot 515 (61 mL), Styroblock 2 (40 mL), and Styroblock 8 (125 mL). Container types Paperpot FH415S and Styroblock 8 produced seedlings suitable for present prescriptions of 25–30 cm as required by the Forest Commission in Victoria. However, growth and survival, although variable, were satisfactory for most container types when sown throughout the summer for late winter outplanting.

Stem eccentricity, crown dry mass distribution, and longitudinal growth strain of plantation-grown Eucalyptus nitens after thinning

2011 ◽  
Vol 41 (11) ◽  
pp. 2209-2218 ◽  
Author(s):  
Jane Medhurst ◽  
Maria Ottenschlaeger ◽  
Matthew Wood ◽  
Chris Harwood ◽  
Chris Beadle ◽  
...  
Keyword(s):  
Mass Distribution ◽  
Dry Mass ◽  
Solid Wood ◽  
Wood Products ◽  
Eucalyptus Nitens ◽  
Cross Sectional ◽  
The North ◽  
Silvicultural Treatments ◽  
Wind Exposure ◽  
Pith Eccentricity

Silvicultural treatments that aim to improve tree growth rates also have the potential to alter physical characteristics of the tree stem and thus affect the recovery of solid-wood products. We tested the hypothesis that manifest crown asymmetry in thinned Eucalyptus nitens (Deane & Maiden) Maiden plantations was affecting the development of stem shape. The crown and stem characteristics of 15 E. nitens trees from a 22-year-old thinning trial in northeastern Tasmania were examined. The trial had been thinned 16 years previously. Lowering the intensity of local intraspecific competition through thinning increased the crown dry mass in the north-facing aspect. No direct link was found between crown dry mass distribution and stem eccentricity. The direction of pith eccentricity at 3.0 m height was confined to the northwest and southeast sectors and averaged 11%; the degree of noncircularity in stems at 3.0 m height was strongly related to the ratio of stem diameter to total height squared. These results suggest that the dynamic loading from wind exposure plays a greater role in determining the extent and direction of pith eccentricity and stem cross-sectional circularity in E. nitens than does the static load from asymmetrical crown dry mass distribution.

Treeshelters: A judicious choice for improving red ash growth

1999 ◽  
Vol 75 (5) ◽  
pp. 845-849 ◽  
Author(s):  
Claude Delisle
Keyword(s):  
Survival Rate ◽  
Height Growth ◽  
Diameter Growth ◽  
Old Fields ◽  
Fraxinus Pennsylvanica ◽  
Overall Survival Rate ◽  
Growth And Survival ◽  
Delta System ◽  
Judicious Choice ◽  
Root Collar

During two consecutive years, 2 + 0 bareroot red ash (Fraxinus pennsylvanica Marsh.) seedlings were planted in the spring in clearcuts and in old fields. In the fall of the same years, treeshelters 120 cm in height were installed to protect plants from browsing. Tree growth and survival were assessed over a four-year period following outplanting. Sheltered trees were then significantly higher than the controls, and their root collar diameters were larger, on average. Trees planted on clearcuts were taller than those on old fields. Four years after outplanting, sheltered trees had a slightly better survival rate than the controls with overall survival rate exceeding 97% for both planting years. Key words: treeshelter, tree protector, Delta system, Fraxinus pennsylvanica, reforestation, survival, height growth, diameter growth

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