A Thinned/Unthinned Loblolly Pine Growth and Yield Simulator for Planted Cutover Site-Prepared Land in the Mid-Gulf South

1992 ◽  
Vol 16 (2) ◽  
pp. 70-75 ◽  
Author(s):  
Thomas G. Matney ◽  
Robert M. Farrar
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Senior Author ◽  
Growth And Yield ◽  
Diameter Distribution ◽  
Quadratic Mean ◽  
Allocation Procedure ◽  
Recovery System ◽  
Least Squares Adjustment ◽  
Pinus Taeda L

Abstract The components and structure of a thinned/unthinned growth and yield simulator, developed by the MSU Growth and Yield Cooperative, for planted loblolly pine (Pinus taeda L.) on cutover site-prepared land are generally described. Prior to the first thinning, a three-parameter Weibull diameter distribution recovery system supported on the arithmetic-mean, quadratic-mean, and minimum-stand diameters is employed. At the first thinning, or if an initial tree list is supplied as input, a parameter-free least squares adjustment, diameter moment recovery system is used to allocate mortality and diameter growth to the elements of the tree list. Because thinnings from below essentially are equivalent to heavy competition mortality, the parameter-free mortality allocation procedure is adapted for allocating thinned trees to the before-thinning tree list. Copies of a PC-compatible computer program implementing the model can be obtained by writing to the senior author. South. J. Appl. For. 16(2):70-75.

Basal Area and Diameter Distribution Models for Loblolly Pine Plantations with Hardwood Competition in the Piedmont and Upper Coastal Plain

1992 ◽  
Vol 16 (2) ◽  
pp. 93-98 ◽  
Author(s):  
Steven A. Knowe
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Coastal Plain ◽  
Basal Area ◽  
Simulation Models ◽  
Diameter Distribution ◽  
Distribution Models ◽  
Pinus Taeda L ◽  
The Impact ◽  
Volume Equations

Abstract Prediction equations were developed for basal area and percentiles of diameter distributions to account for the hardwood component in site-prepared, Piedmont and Upper Coastal Plain loblolly pine (Pinus taeda L.) plantations. Unlike existing stand-level simulation models that incorporate hardwood competition, the new equations resulted in constant total basal area regardless of the amount of hardwood competition and permitted the variance of the diameter distribution to increase with increasing proportion of hardwoods. The equations presented can be used with existing dominant height, survival, and volume equations as a tool for assessing the impact of hardwoods on loblolly pine yield. South. J. Appl. For. 16(2):93-98.

Hardwood Eradication Improves Productivity of Thinned Loblolly Pine Stands

1984 ◽  
Vol 8 (4) ◽  
pp. 194-197 ◽  
Author(s):  
T. R. Clason
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Volume Growth ◽  
Growth And Yield ◽  
Detectable Effect ◽  
Herbaceous Vegetation ◽  
Vegetation Control ◽  
Pine Stands ◽  
Pinus Taeda L

Abstract A single hardwood eradication treatment in a 7-year-old loblolly pine (Pinus taeda L.) stand along with pine stocking control increased growth and yield over a 10-year period. Herbaceous vegetation control had no detectable effect at ages 12 and 17. Treated plots had smaller stems, which could be controlled more readily by fire, although the number of understory stems was similar for all treatments. Mean annual radial and merchantable volume growth on treated plots surpassed controls by 30%. Future stand values were enhanced by removing hardwood competition. Residual stand sawtimber volumes on the treated plots were twice that of the control.

Growth and Yield of Planted Loblolly and Shortleaf Pines in a North Mississippi Creek Bottom

1985 ◽  
Vol 9 (4) ◽  
pp. 247-249 ◽  
Author(s):  
H. L. Williston
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Site Index ◽  
Growth And Yield ◽  
Pinus Echinata ◽  
Shortleaf Pine ◽  
Pinus Taeda L ◽  
A Site

Abstract Unthinned loblolly pine (Pinus taeda L.) planted near Abbeville, Mississippi in a creek bottom with a site index of 122 had a yield of 6,925 cubic feet per acre at age 26. Shortleaf pine (Pinus echinata Mill.) planted beside the loblolly pine had a site index of 108 and a yield of 4,120 cubic feet per acre.

Absolute and relative changes in tree growth rates and changes to the stand diameter distribution of Pinus taeda as a result of midrotation fertilizer applications

2008 ◽  
Vol 38 (7) ◽  
pp. 2063-2071 ◽  
Author(s):  
Colleen A. Carlson ◽  
Harold E. Burkhart ◽  
H. Lee Allen ◽  
Thomas R. Fox
Keyword(s):  
Weibull Distribution ◽  
Pinus Taeda ◽  
Growth Response ◽  
Stand Density ◽  
Site Index ◽  
Growth And Yield ◽  
Diameter Distribution ◽  
Nitrogen And Phosphorus ◽  
Scale Parameters ◽  
Pinus Taeda L

Silvicultural treatments have the potential to change the diameter distribution of a stand, which can alter the final product mix of the stand. Growth and yield models need to account for these changes in the diameter distribution to assess the economic viability of the silvicultural operations. We investigated how the diameter distribution of Pinus taeda L. stands changes as a result of midrotation fertilization. Data from 43 installations of a nitrogen and phosphorus midrotation fertilizer trial series established in the southeastern United States were used in the study. The results indicated that both the absolute growth response and the relative growth response of individual trees were greater among the larger trees. A three-parameter Weibull distribution fitted at each study site was used to investigate how the parameters of the distribution changed with time and treatment. The location and scale parameters of the Weibull distribution were both affected by fertilization. Stand variables, such as site index, age, stand density, and mean diameter at time of fertilization, also affected the location and scale parameters. The shape parameter was not affected by any of the treatments in this study.

scholarly journals A Consensus Map for Loblolly Pine (Pinus taeda L.). I. Construction and Integration of Individual Linkage Maps From Two Outbred Three-Generation Pedigrees

Genetics ◽  
1999 ◽  
Vol 151 (1) ◽  
pp. 321-330 ◽  
Author(s):  
Mitchell M Sewell ◽  
Bradley K Sherman ◽  
David B Neale
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Fragment Length Polymorphism ◽  
Random Amplified Polymorphic Dna ◽  
Mapping Function ◽  
Genetic Maps ◽  
Linkage Data ◽  
Linkage Maps ◽  
Consensus Map ◽  
Pinus Taeda L

Abstract A consensus map for loblolly pine (Pinus taeda L.) was constructed from the integration of linkage data from two unrelated three-generation outbred pedigrees. The progeny segregation data from restriction fragment length polymorphism, random amplified polymorphic DNA, and isozyme genetic markers from each pedigree were recoded to reflect the two independent populations of parental meioses, and genetic maps were constructed to represent each parent. The rate of meiotic recombination was significantly greater for males than females, as was the average estimate of genome length for males {1983.7 cM [Kosambi mapping function (K)]} and females [1339.5 cM(K)]. The integration of individual maps allows for the synthesis of genetic information from independent sources onto a single consensus map and facilitates the consolidation of linkage groups to represent the chromosomes (n = 12) of loblolly pine. The resulting consensus map consists of 357 unique molecular markers and covers ∼1300 cM(K).

Long-term effects of stand density management and genotype on wood properties of loblolly pine (Pinus taeda L.) in the mid-South USA

2021 ◽  
Vol 491 ◽  
pp. 119176
Author(s):  
Michael A. Blazier ◽  
Thomas Hennessey ◽  
Laurence Schimleck ◽  
Scott Abbey ◽  
Ryan Holbrook ◽  
...  
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Stand Density ◽  
Wood Properties ◽  
Long Term Effects ◽  
Stand Density Management ◽  
Pinus Taeda L

scholarly journals Four Site-Preparation Techniques for Regenerating Pine-Hardwood Mixtures in the Piedmont

1997 ◽  
Vol 21 (3) ◽  
pp. 116-122 ◽  
Author(s):  
Thomas A. Waldrop
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Height Growth ◽  
Site Preparation ◽  
Site Conditions ◽  
Growing Seasons ◽  
Southern Appalachian ◽  
Medium Quality ◽  
Pinus Taeda L ◽  
Preparation Techniques

Abstract Four variations of the fell-and-burn technique, a system developed to produce mixed pine-hardwood stands in the Southern Appalachian Mountains, were compared in the Piedmont region. All variations of this technique successfully improved the commercial value of low-quality hardwood stands by introducing a pine component. After six growing seasons, loblolly pine (Pinus taeda L.) occupied the dominant crown position and oaks the codominant position in fell-and-burn treated stands on poor to medium quality sites. The precise timing of felling residual stems, as prescribed by the fell-and-burn technique, may be flexible because winter and spring felling produced similar results. Although summer site preparation burns reduced hardwood height growth by reducing the length of the first growing season, they did not improve pine survival or growth. Pines were as tall as hardwoods within four growing seasons in burned plots and within six growing seasons in unburned plots. Additional research is needed to determine the level or intensity of site preparation needed to establish pine-hardwood mixtures over a range of site conditions. South. J. Appl. For. 21(3):116-122.

scholarly journals Genotypic Stability Effects on Predicted Family Responses to Silvicultural Treatments in Loblolly Pine

1997 ◽  
Vol 21 (2) ◽  
pp. 84-89 ◽  
Author(s):  
Steven E. McKeand ◽  
Robert P. Crook ◽  
H. Lee Allen
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Growth Responses ◽  
Intensive Culture ◽  
Genotype By Environment ◽  
Silvicultural Treatments ◽  
Genotypic Stability ◽  
Superior Genotypes ◽  
Using Data ◽  
Pinus Taeda L

Abstract The lack of rank change in growth characteristics when open-pollinated families of loblolly pine (Pinus taeda L.) are planted on different sites in the Southeast has greatly simplified breeding for superior genotypes. Although family rank does not usually change, genotype by environment interactions (GxE) may be very important in operational deployment of families in regeneration programs. Using data from GxE trials and two site preparation-fertilization-herbicide trials, we estimated the growth that different families should achieve following application of these silvicultural practices. Better performing families tend to be most responsive to site changes (i.e. genetically unstable). Growth responses to silvicultural treatment will be overestimated if only the most responsive families are used in silvicultural research trials. Similarly, genetic gains will be overestimated if gain trials are planted on only the best sites or receive intensive culture. South. J. Appl. For. 21(2):84-89.

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