A Site-Index Function for Naturally Regenerated Longleaf Pine in the East Gulf Area

1981 ◽  
Vol 5 (3) ◽  
pp. 150-153 ◽  
Author(s):  
Robert M. Farrar
Keyword(s):  
Longleaf Pine ◽  
Pinus Palustris ◽  
Site Index ◽  
Index Function ◽  
Naturally Regenerated Stands ◽  
A Site

Abstract A site-index function is presented for naturally regenerated stands of longleaf pine (Pinus palustris Mill.) in the East Gulf area. The equation resulted in minimum average differences in consecutive site-index estimates five years apart in 170 stands, when compared to two equations currently in use.

scholarly journals Dynamic Site Index Equation for Thinned Stands of Even-Aged Natural Longleaf Pine

2010 ◽  
Vol 34 (1) ◽  
pp. 28-37 ◽  
Author(s):  
Dwight K. Lauer ◽  
John S. Kush
Keyword(s):  
Longleaf Pine ◽  
Pinus Palustris ◽  
Site Index ◽  
The United States ◽  
Permanent Plots ◽  
Gulf Region ◽  
Dummy Variable ◽  
Variable Approach ◽  
One Step ◽  
Generalized Algebraic Difference Approach

Abstract A dynamic site equation derived using the generalized algebraic difference approach was developed for thinned stands of natural longleaf pine (Pinus palustris Mill.) in the East Gulf region of the United States using 40 years of measurements on 285 permanent plots. The base model predicts height growth of trees once they reach 4.5 ft and was fit using a varying parameter for each tree and global parameters that are constant for all 3,267 trees. Parameters were estimated in one step using the dummy variable approach and a first-order autoregressive error term to account for serial correlation. The final base-age invariant equation allows the user to specify the number of years required for trees to reach 4.5 ft in height.

Assessment of natural regeneration of longleaf pine (Pinus palustris) 15 years post-regeneration control

2021 ◽  
Author(s):  
Zhaofei Fan ◽  
W. Keith Moser ◽  
Cameron Poyner ◽  
Shaoyang Yang ◽  
Sunil Nepal ◽  
...  
Keyword(s):  
Natural Regeneration ◽  
Longleaf Pine ◽  
Basal Area ◽  
Pinus Palustris ◽  
Site Index ◽  
Stand Age ◽  
Quadratic Mean ◽  
Wide Range ◽  
Grass Stage ◽  
Quadratic Mean Diameter

We assessed natural regeneration of longleaf pine (Pinus palustris Mill.) using the data col-lected from the Escambia Experimental Forest in southern Alabama. Fifteen years following the regeneration control, natural regeneration of longleaf remained patchy across a wide range of site/stand conditions, with slightly more than half of all plots containing regeneration, but the den-sity of seedlings and saplings varied significantly. The abundance of seedlings ≤ 1-year-old was positively related to stand age and time since last fire, but negatively related to overstory basal area. The abundance of seedlings and saplings was positively related to stand age, but negatively related to time since last fire and overstory basal area. The probability of achieving ≥ 15,000 seedlings > 1-year-old but ≤ 1-m-tall ha-1 and ≥ 1,250 saplings > 1-m-tall ha-1 was, respectively, positively related to the ratio of time since last fire to overstory basal area and the ratio of quadratic mean diameter to site index. A longer fire interval (> two to three years) should be adopted to naturally regenerate longleaf. We did not find clear zones of exclusion present in natural regeneration even though over-story trees, seedlings and saplings tended to be repulsive spatially and > 80% grass stage seedlings and saplings occurred outside tree crowns.

scholarly journals A Generational Change in Site Index for Naturally Established Longleaf Pine on a South Alabama Coastal Plain Site

2001 ◽  
Vol 25 (2) ◽  
pp. 88-92 ◽  
Author(s):  
William D. Boyer
Keyword(s):  
Coastal Plain ◽  
Climate Changes ◽  
Longleaf Pine ◽  
Pinus Palustris ◽  
Site Index ◽  
Site Quality ◽  
Generational Change ◽  
Index Data ◽  
Second Growth

Abstract Research on longleaf pine (Pinus palustris Mill.) has been carried out for over 50 yr on a coastal plain site in south Alabama. Studies have included the original second-growth stands and also naturally established third-growth stands. Site index data revealed that estimated site index values for third growth generally exceeded those for second growth. Age 50 site index in 16 study compartments with second growth near index age averaged 66 ft. Estimated site index for third-growth stands recorded in 17 different compartments averaged 81 ft. Nine of the 16 compartments with second-growth stands now include third growth about 40 yr in age. This provided an opportunity to make a direct comparison of generational site index differences within the same compartments. Site index for second growth averaged 65 ft (range 61 to 70 ft), while third growth averaged 83 ft (range 77 to 87 ft). Reasons for this large increase in apparent site quality are unknown, but since soils are the same, some climate changes may be suspect. South. J. Appl. For. 25(2):88–92.

scholarly journals Site Index Curves for Direct-Seeded Loblolly and Longleaf Pines in Louisiana

1997 ◽  
Vol 21 (3) ◽  
pp. 134-138 ◽  
Author(s):  
Quang V. Cao ◽  
V. Clark Baldwin ◽  
Richard E. Lohrey
Keyword(s):  
Loblolly Pine ◽  
Longleaf Pine ◽  
Pinus Palustris ◽  
Site Index ◽  
Permanent Plots ◽  
Height Prediction ◽  
Direct Seeded ◽  
Stand Height ◽  
Pinus Taeda L ◽  
Longleaf Pines

Abstract Site index equations were developed for direct-seeded loblolly pine (Pinus taeda L.) and longleaf pine (Pinus palustris Mill.) based on data from 148 and 75 permanent plots, respectively. These plots varied from 0.053 to 0.119 ac in size, and were established in broadcast, row, and spot seeded stands throughout Louisiana. The Bailey and Clutter (1974) model was selected for stand height prediction. Site index curves are presented for both species based on these equations. These site index models should provide satisfactory short-term height projection for direct-seeded loblolly and longleaf pine stands in Louisiana. South. J. Appl. For. 21(3):134-138.

Longleaf Pine (Pinus palustris Mill.) Branch Pruning by Prescribed Fire

2021 ◽  
Author(s):  
John P McGuire ◽  
John S Kush ◽  
J Morgan Varner ◽  
Dwight K Lauer ◽  
J Ryan Mitchell
Keyword(s):  
Prescribed Fire ◽  
Longleaf Pine ◽  
Wood Quality ◽  
Pinus Palustris ◽  
Planting Density ◽  
Prescribed Fires ◽  
Pine Tree ◽  
Southeastern Us ◽  
Tree Survival ◽  
The Impact

Abstract Efforts to restore longleaf pine (Pinus palustris Mill.) in the southeastern US require substantial artificial regeneration. Once established, important questions remain about when to introduce fire. We investigated the impact of initial planting density on tree branching and how prescribed fire might interact with tree architecture and survival. A particular focus was on how prescribed fires could “prune” lower branches. Lower density plantings (897 trees ha−1) had more and larger live lower branches than higher density plantings (2,243 trees ha−1). Fire was effective in pruning lower branches regardless of season burned, but fire in the growing season was more effective at pruning. Branches up to a height of 1.5 to 2 m were killed by fire. Fire applied in August caused greater damage with more needles scorched and/or consumed and more stem char. Prescribed fire did not impact longleaf pine tree survival. In general, fire applied to longleaf pine facilitated pruning lower branches that affect long-term wood quality, an additional argument for its utility in restoration and management of these ecosystems.

Fire Season Effects on Flowering Characteristics and Germination of Longleaf Pine (Pinus palustris) Savanna Grasses

2011 ◽  
Vol 20 (2) ◽  
pp. 268-276 ◽  
Author(s):  
Benjamin J. Shepherd ◽  
Deborah L. Miller ◽  
Mack Thetford
Keyword(s):  
Longleaf Pine ◽  
Pinus Palustris ◽  
Fire Season
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