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.

Effects of Site Preparation on Douglas-Fir Seedling Growth and Survival

1990 ◽  
Vol 5 (2) ◽  
pp. 49-51 ◽  
Author(s):  
Don Minore ◽  
Howard G. Weatherly
Keyword(s):  
Pseudotsuga Menziesii ◽  
Seedling Growth ◽  
Height Growth ◽  
Site Preparation ◽  
Douglas Fir ◽  
Progeny Test ◽  
Seedling Height ◽  
Soil Humus ◽  
Growth And Survival ◽  
Mechanical Site Preparation

Abstract The effects of five yarding-slash treatment combinations on Douglas-fir (Pseudotsuga menziesii) growth and survival were compared by obtaining seedling heights, potential seedling heights, survival percentages, soil-penetration resistances, and the occurrence of visible soil-humus for 149 progeny-test plantations in western Oregon. Survival was not improved by mechanical site preparation, and seedlings grown on the compacted, low-humus soils associated with piling slash off site did not grow as tall during their first 5 years as seedlings growing on similar sites where slash had been broadcast-burned. Tilling (disking or ripping) did not benefit seedling height growth. West. J. Appl. For. 5(2):49-51, April 1990.

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.

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.

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.

Sowing time and tillage practice affect chickpea yield and nitrogen fixation. 1. Dry matter accumulation and grain yield

1996 ◽  
Vol 36 (6) ◽  
pp. 695 ◽  
Author(s):  
CP Horn ◽  
CJ Birch ◽  
RC Dalal ◽  
JA Doughton
Keyword(s):  
Grain Yield ◽  
Dry Matter ◽  
Grain Legume ◽  
Wheat Crop ◽  
Late Winter ◽  
Dry Matter Accumulation ◽  
Dry Matter Yield ◽  
Tillage Practice ◽  
Management Options ◽  
Sowing Time

Mean protein concentrations in wheat (Triticum aestivum) on the Darling Downs of southern Queensland have fallen below 10% in recent years, preventing farmers from obtaining 'Prime Hard' status (13.0%) for their wheat crop. Two management options, for improving this situation are applications of nitrogenous fertiliser in a wheat monoculture or inclusion of a legume in rotation with wheat. Long-term trials at Warra, on the western Darling Downs, resulted in the selection of chickpea (Cicer arietinum) as a useful grain legume cash crop with potential for improvement of its nitrogen (N) fixing ability through management. This 2-year study examined the effect of sowing time and tillage practice on dry matter yield, grain yield, N accumulation and N2 fixation in chickpea and the subsequent soil N balance. There were 3 sowing times during autumn and winter of each year using conventional tillage (CT). Zero tillage (ZT) was introduced after the first crop for all sowing times. Greater total dry matter yield and grain yield (4.18-5.95 and 1.63-2.25 t/ha, respectively) resulted from sowing in autumn or early winter than from sowing in late winter (3.39-3.86 and 0.97-1.22 kg/ha, respectively). The effects of tillage practice were variable, depending on growth stage. At harvest, ZT plots produced greater total dry matter yield (4.20 t/ha) and grain yield (1.94 t/ha) than CT plots (3.01 and 1.29 t/ha, respectively), whereas at the time of maximum dry matter, yield was higher under CT for autumn sowings, and under ZT for winter sowings.

Factors related to seedling growth in a boreal Scots pine stand: a spatial analysis of a vegetation–soil system

1993 ◽  
Vol 23 (10) ◽  
pp. 2101-2109 ◽  
Author(s):  
Timo Kuuluvainen ◽  
Timo J. Hokkanen ◽  
Erkki Järvinen ◽  
Timo Pukkala
Keyword(s):  
Soil Properties ◽  
Scots Pine ◽  
Seedling Growth ◽  
Mineral Soil ◽  
Height Growth ◽  
Understory Vegetation ◽  
Small Scale ◽  
Theory Approach ◽  
Seedling Height ◽  
Canopy Trees

The spatial structure of vegetation and soil properties of a patchy Scots pine (Pinussylvestris L.) forest of 1 ha was described and examined in relation to the height growth of pine seedlings in the understory. Measured ecosystem properties included the distribution and sizes of canopy trees, within-stand radiation regime, composition of understory vegetation, and topsoil and mineral soil properties. The joint distance dependent effects of large trees were described as the influence potential, derived from the ecological field theory approach. The variation in understory vegetation and soil characteristics was described as score values, derived from multivariate analyses, summarizing the variation of multiple measured variables; factor analysis was used for topsoil and mineral soil properties and canonical correspondence analysis was used for understory species composition. The spatial variation of variables was examined and mapped using geostatistical techniques. The influence potential of canopy trees, as determined by their size and spatial distribution, correlated most strongly with seedling growth, so that the height growth of seedlings was retarded in the vicinity of trees. Correlations suggest that canopy trees also affected seedlings indirectly through their dominating effect on the properties of understory vegetation and humus layer. The mineral soil nutrient content showed a weak positive correlation with seedling height growth. All the factors related to seedling growth showed substantial small-scale variation across the 1-ha study site. The analysis suggests that the variation in seedling height growth in the understory of the studied Scots pine stand is largely caused by the spatial heterogeneity of both above- and below-ground factors and by the joint effect of their complex interaction.

scholarly journals Development and dynamics of mountain spruce (Picea abies [L.] Karsten) stand regeneration

2014 ◽  
Vol 60 (No. 2) ◽  
pp. 61-69 ◽  
Author(s):  
K. Malík ◽  
J. Remeš ◽  
S. Vacek ◽  
V. Štícha
Keyword(s):  
Picea Abies ◽  
Bark Beetle ◽  
Natural Regeneration ◽  
National Park ◽  
Height Growth ◽  
Seedling Height ◽  
Artificial Regeneration ◽  
Class Differences ◽  
The Past ◽  
Tree Layer

We summarized development and dynamics of natural regeneration in mountain spruce forests in areas affected by bark beetle gradation in the Šumava National Park. Detailed measurements of the regeneration were carried out using Field-Map technology (www.fieldmap.com) on ten permanent research plots. Research plots included the forests with decaying tree layer, stands in partial decline and stands with a generally healthy, or only partially damaged tree layer. Differences in rates of regeneration are very significant between the particular types of plots, especially in the youngest age class. Differences are also evident in the seedling height under varying treatments. The highest numbers of recruits (9,880 per ha) were found under intact overstorey canopies, while the fastest height growth occurred on clearcuts. This study also investigated and evaluated artificial regeneration done in the past.  

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.

QUANTITATIVE STUDY OF INTRASPECIFIC VARIATION OF DNA PER CELL IN PICEA GLAUCA AND PINUS BANKSIANA

1968 ◽  
Vol 10 (3) ◽  
pp. 590-600 ◽  
Author(s):  
Jerome P. Miksche
Keyword(s):  
Intraspecific Variation ◽  
Picea Glauca ◽  
Pinus Banksiana ◽  
Inverse Relationship ◽  
Height Growth ◽  
Nuclear Volume ◽  
Seedling Height ◽  
Dna Amount ◽  
Dna Variation ◽  
Seed Sources

Intraspecific variation of DNA per cell was established chemically and cytophotometrically for 17 seed sources of Picea glauca, and cytophotometrically for 11 sources of Pinus banksiana. The DNA Feulgen absorption per cell varied from the lowest to the highest amount by factors of 1.6 and 1.5 for Picea glauca and Pinus banksiana, respectively. Intraspecific DNA also varies with intraspecific nuclear volume. Intraspecific variation of histone was similar to the observed DNA variation. A regression analysis between DNA per cell and latitude provided evidence that eastern and western population series of Picea glauca existed in the seed sources studied. Two-year seedling height growth results demonstrated that eastern seed sources are different from western seed sources. Seedling height in the western provenances varied inversely with DNA content; i.e., seed sources with small DNA per cell displayed greater growth, whereas the eastern sources did not display the inverse relationship between DNA amount and 2-year growth.

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