Nondestructive estimation of the needle weight and stem weight of small loblolly pine trees (Pinustaeda)

1986 ◽  
Vol 16 (2) ◽  
pp. 403-405
Author(s):  
Theodore H. Shear ◽  
Thomas O. Perry
Keyword(s):  
Loblolly Pine ◽  
Pine Trees ◽  
Independent Variable ◽  
Root Collar ◽  
Nondestructive Estimation

A method for estimating needle weight of 4-year-old loblolly pine trees from branch numbers and measurements is described. Bole weights are estimated independently from diameter measurements at the root collar. Development of independent estimates of needle weight and bole weight allowed an analysis of the variation in bole weight that was attributable to needle weight (as an independent variable).

scholarly journals Modeling the impact of thinning on height development of dominant and codominant loblolly pine trees

2006 ◽  
Vol 63 (4) ◽  
pp. 349-354 ◽  
Author(s):  
Mahadev Sharma ◽  
Michael Smith ◽  
Harold E. Burkhart ◽  
Ralph L. Amateis
Keyword(s):  
Loblolly Pine ◽  
Pine Trees ◽  
The Impact

Wood density of loblolly pine trees as affected by crown thinnings and harvest age in southern Brazil

2018 ◽  
Vol 52 (2) ◽  
pp. 465-485 ◽  
Author(s):  
Mário Dobner ◽  
Juergen Huss ◽  
Mário Tomazello Filho
Keyword(s):  
Wood Density ◽  
Loblolly Pine ◽  
Southern Brazil ◽  
Pine Trees

scholarly journals ECONOMIC PERFORMANCE OF LOBLOLLY PINE STANDS IN SOUTHERN BRAZIL AS A RESULT OF DIFFERENT CROWN THINNING INTENSITIES1

2019 ◽  
Vol 43 (2) ◽  
Author(s):  
Mário Dobner Jr ◽  
Dagoberto Stein de Quadros
Keyword(s):  
Loblolly Pine ◽  
Economic Performance ◽  
Southern Brazil ◽  
Expectation Value ◽  
Economic Output ◽  
Land Expectation Value ◽  
Pine Trees ◽  
Crown Thinning ◽  
Log Price ◽  
Pinus Taeda L

ABSTRACT Approximately 1.6 million hectares of southern Brazil are cultivated with pines, and mainly with the loblolly pine (Pinus taeda L.). More than one third of the stands belong to independent log producers, whose aim is to maximize their economic results. In this study, a thinning experiment was evaluated over a production period of 30 years. The stands evaluated were submitted to three different crown thinning intensities, with an unthinned stand used as a control. The aim of the study was to evaluate economic criteria regarding realistic discount rates and production periods varying between 16-30 years. For the circumstances that were evaluated, 'extreme' and early release from competition of pruned loblolly pine trees lead to the best economic performance (land expectation value = ~36,000 US$ ha-1, i = 3% yr-1). Stands subjected to crown thinnings, independently of intensity, produced three times the economic output of unthinned and unpruned stands. Although the optimal harvest ages, according to the internal rate of return, are between 18-22 years for thinned and unthinned stands, from a long-term perspective (land expectation value) and for the current relationship between log price and size, the optimal economic performance requires that production periods are extended (to 24-26 years) from those currently practised in southern Brazil (15-20 years).

New-Ground Syndrome: An Ectomycorrhizal Deficiency in Pine Nurseries

1988 ◽  
Vol 12 (4) ◽  
pp. 234-239
Author(s):  
David B. South ◽  
R. J. Mitchell ◽  
R. K. Dixon ◽  
Mark Vedder
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Tree Seedlings ◽  
Spore Dispersal ◽  
History Of ◽  
Collar Diameter ◽  
Low Levels ◽  
Pinus Taeda L ◽  
Phosphorus Application ◽  
Root Collar

Abstract In July 1986, stunted loblolly pine (Pinus taeda L.) seedlings were studied at a nursery in Union Springs, Alabama. Stunted seedlings were found only in seedbeds formed on new ground (soil having no history of producing a nursery crop of ectomycorrhizal tree seedlings). The stunted seedlings were either nonmycorrhizal or had extremely low levels of ectomycorrhizae, whereas nonstunted seedlings had a greater degree of ectomycorrhizal development. Stunted seedlings were deficient in phosphorus (0.07%), whereas nonstunted seedlings had sufficient phosphorus (0.15%). An application of phosphoric acid (H3PO4) to stunted seedlings increased shoot phosphorus and resulted in substantial growth improvement. The phosphorus application reduced the percentage of cull seedlings (root-collar diameter <3.2 mm) from 62% to 8%. This study also demonstrates that when a seedbed is formed on new ground, ectomycorrhizal deficiencies can occur even when ectomycorrhizal tree hosts are present in the immediate vicinity. The ectomycorrhizal deficiency in the seedlings observed in this study may have been related to restricted spore dispersal caused by insufficient rainfall that had occurred after spring fumigation. South J. App. For. 12(4):234-239.

Diameter Increment and Survival Equations for Loblolly Pine Trees Growing in Thinned and Unthinned Plantations on Cutover, Site-Prepared Lands

1989 ◽  
Vol 13 (4) ◽  
pp. 170-174 ◽  
Author(s):  
Ralph L. Amateis ◽  
Harold E. Burkhart ◽  
Terese A. Walsh
Keyword(s):  
Loblolly Pine ◽  
Growth Function ◽  
Individual Tree ◽  
Competitive Position ◽  
Probability Of Survival ◽  
Diameter Increment ◽  
Annual Probability ◽  
Pine Trees ◽  
Stand Conditions

Abstract Individual tree dbh increment and survival equations were developed for predicting annual dbh growth and annual probability of survival of loblolly pine trees in thinned and unthinned plantations on cutover, site-prepared lands. The dbh increment equation predicts dbh increment froma potential dbh growth function multiplied by a modifier function. The survival equations predicts the probability of survival as a function of crown ratio and the tree's competitive position in the stand. When used together, the equations should be useful to foresters interested in predictingfuture dbh and survival values for both thinned and unthinned stand conditions. South. J. Appl. For. 13(4):170-174.

Seasonal Abundance, Arrival and Emergence Patterns of Predaceous Hister Beetles (Coleoptera: Histeridae) Associated with Ips Engraver Beetles (Coleoptera: Scolytidae) in Louisiana

2003 ◽  
Vol 38 (4) ◽  
pp. 612-620 ◽  
Author(s):  
William P. Shepherd ◽  
Richard A. Goyer
Keyword(s):  
Loblolly Pine ◽  
Bark Beetles ◽  
Dendroctonus Frontalis ◽  
Seasonal Abundance ◽  
Southern Pine Beetle ◽  
Visual Orientation ◽  
Sticky Traps ◽  
Emergence Patterns ◽  
Pine Beetle ◽  
Pine Trees

The most common predaceous hister beetles (Coleoptera: Histeridae) found associated with Ips engraver beetles (Coleoptera: Scolytidae) in southern Louisiana were Platysoma attenuata LeConte, P. cylindrica (Paykull), P. parallelum (Say), and Plegaderus transversus (Say). The seasonal abundance of histerids caught in flight traps coincided with Ips spp. activity in the area. Histerid adults were initially caught in sticky traps on Ips-infested loblolly pine logs 1 wk after Ips spp. attacks had begun. As a group, histerids emerged from logs in a bimodal pattern with the first peak occurring during Ips spp. emergence and a second 4 wks later. The abundance of P. parallelum and P. transversus indicates that they likely fed on bark beetles and organisms arriving later in the colonization sequence. Visual orientation appeared to play a role in attraction of histerids to logs colonized by bark beetles. Platysoma attenuata preferred vertically-positioned logs to horizontal logs, while P. parallelum was the opposite. These results suggest that some histerids may be visually attracted to horizontal silhouettes, such as pine trees that have been blown down or felled and often are infested by Ips spp. Other hister beetles may prefer vertical silhouettes, such as standing pines, which tend to be colonized by the southern pine beetle, Dendroctonus frontalis Zimmermann.

scholarly journals Susceptibility of parent and interspecific F1 hybrid pine trees to tip moth damage in a coastal North Carolina planting

2001 ◽  
Vol 31 (5) ◽  
pp. 919-923 ◽  
Author(s):  
Maxine T Highsmith ◽  
John Frampton ◽  
David O'Malley ◽  
James Richmond ◽  
Martesa Webb
Keyword(s):  
North Carolina ◽  
Loblolly Pine ◽  
Dominant Mode ◽  
Slash Pine ◽  
F1 Hybrids ◽  
F1 Hybrid ◽  
Pine Trees ◽  
Rhyacionia Frustrana ◽  
Hybrid Pine ◽  
Pinus Taeda L

Tip moth damage among families of parent pine species and their interspecific F1 hybrids was quantitatively assessed in a coastal planting in North Carolina. Three slash pine (Pinus elliotti var. elliotti Engelm.), two loblolly pine (Pinus taeda L.), and four interspecific F1 hybrid pine families were used. The F1 hybrids were as susceptible to damage by Nantucket pine tip moth (Rhyacionia frustrana (Comst.)), as was their susceptible loblolly pine parent. Their phenotypes support a dominant or partially dominant mode of inheritance for susceptibility. The phenotype of one slash pine family was not statistically different from the phenotypes of the loblolly and F1 hybrid pines. The high susceptibility of that one slash pine family appeared to be intrinsic, even though slash pine is considered resistant to tip moth damage. Tip moth damage on the two other slash pine families was significantly lower.

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