Differences in growth dynamics of loblolly and slash pine plantations in the southeastern United States

2012 ◽  
Vol 281 ◽  
pp. 84-92 ◽  
Author(s):  
Dehai Zhao ◽  
Michael Kane
Keyword(s):  
United States ◽  
Southeastern United States ◽  
Growth Dynamics ◽  
Slash Pine ◽  
Pine Plantations

Genotype×environment interactions in selected loblolly and slash pine plantations in the Southeastern United States

2007 ◽  
Vol 238 (1-3) ◽  
pp. 175-188 ◽  
Author(s):  
Brian E. Roth ◽  
Eric J. Jokela ◽  
Timothy A. Martin ◽  
Dudley A. Huber ◽  
Timothy L. White
Keyword(s):  
United States ◽  
Southeastern United States ◽  
Slash Pine ◽  
Pine Plantations

Losses of fertilizer nitrogen after a winter fertilization in three managed pine plantations of the southeastern United States

2020 ◽  
Vol 84 (2) ◽  
pp. 609-617
Author(s):  
Jay E. Raymond ◽  
Thomas R. Fox ◽  
Rachel L. Cook ◽  
Timothy J. Albaugh ◽  
Rafael Rubilar
Keyword(s):  
United States ◽  
Southeastern United States ◽  
Pine Plantations ◽  
Fertilizer Nitrogen

Competition dynamics in pure- versus mixed-family stands of loblolly and slash pine in the southeastern United States

2009 ◽  
Vol 39 (2) ◽  
pp. 396-409 ◽  
Author(s):  
Christina L. Staudhammer ◽  
Eric J. Jokela ◽  
Timothy A. Martin
Keyword(s):  
United States ◽  
Southeastern United States ◽  
Pinus Elliottii ◽  
Slash Pine ◽  
Planting Density ◽  
Tree Level ◽  
Family Interactions ◽  
Growth Strategies ◽  
Full Sibling ◽  
Mixed Family

Few studies within the native range of loblolly ( Pinus taeda L.) and slash pine ( Pinus elliottii Engelm. var. elliottii) have compared yield and stand dynamics in pure-family block versus mixed-family block plantings under a range of silvicultural treatments. Understanding intergenotypic competitive interactions is important for predicting phenotypic performance, defining growth strategies and ideotypes, and deploying the correct mix of families that possess complementary characteristics for enhanced yield and pest resistance. In 2000, replicated experimental trials were installed in the southeastern United States, controlling for genotype (pure- and mixed-family plantings; consisting of seven full-sibling loblolly and six full-sibling slash pine families), planting density (1334 vs. 2990 trees/ha), and levels of silvicultural treatment intensity (operational vs. intensive). We measured four installations of these trials. There were numerous examples of differential family performance in mixed versus pure plots manifested as significant deployment × family interactions for diameter at breast height, height, basal area, volume, survival, disease, and damage traits. Significant and consistent interactions of several families with mixed versus pure deployment led to the identification of putative crop and competition ideotypes in both loblolly and slash pine. Tree-level crown architectural traits and an index of growth efficiency for the identified families were consistent with the hypothesized ideotypes.

Loblolly pine outperforms slash pine in the southeastern United States – A long-term experimental comparison study

2019 ◽  
Vol 450 ◽  
pp. 117532 ◽  
Author(s):  
Dehai Zhao ◽  
Bronson P. Bullock ◽  
Cristian R. Montes ◽  
Mingliang Wang ◽  
Dale Greene ◽  
...  
Keyword(s):  
United States ◽  
Loblolly Pine ◽  
Southeastern United States ◽  
Slash Pine ◽  
Experimental Comparison ◽  
Comparison Study

Preemergence Weed Control in Southeastern Forest Nurseries

Weed Science ◽  
1973 ◽  
Vol 21 (4) ◽  
pp. 363-366 ◽  
Author(s):  
T. R. Dill ◽  
M. C. Carter
Keyword(s):  
United States ◽  
Pinus Taeda ◽  
Weed Control ◽  
Loblolly Pine ◽  
Southeastern United States ◽  
Pinus Elliottii ◽  
Slash Pine ◽  
High Rate ◽  
Forest Nurseries ◽  
Low Rate

Weed control trials were conducted on loblolly pine (Pinus taedaL.) or slash pine (Pinus elliottiiEngelm.) seedbeds at 12 locations in the southeastern United States. Good weed control was obtained from 2,4-bis-(isopropylamino)-6-(methylthio)-s-triazine (prometryne) at 2.2 and 4.5 kg/ha;N,N-dimethyl-2,2-diphenylacetamide (diphenamid) at 4.5 and 9 kg/ha; α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine (trifluralin) at 1.1 and 2.2 kg/ha; and 2-ethylthio-4,6-bis-isopropylamino-s-triazine (GS-16068) at 2.2 and 4.5 kg/ha as preemergence applications immediately followed by irrigation. Diphenamid and trifluralin treatments were not injurious to either pine species at either rate. GS-16068 was only slightly injurious at the high rate at one location. Prometryne was injurious at two locations at the high rate and at one location at the low rate.

Financial Returns for Biomass on Short-Rotation Loblolly Pine Plantations in the Southeastern United States

2021 ◽  
Author(s):  
Andrew Trlica ◽  
Rachel L Cook ◽  
Timothy J Albaugh ◽  
Rajan Parajuli ◽  
David R Carter ◽  
...  
Keyword(s):  
United States ◽  
Loblolly Pine ◽  
Southeastern United States ◽  
Field Studies ◽  
Pine Plantations ◽  
Planting Density ◽  
Financial Returns ◽  
Short Rotation ◽  
Competition Control ◽  
Whole Tree

Abstract Rising demand for renewable energy has created a potential market for biomass from short-rotation pine plantations in the southeastern United States. Site preparation, competition control, fertilization, and enhanced seedling genotypes offer the landowner several variables for managing productivity, but their combined effects on financial returns are unclear. This study estimated returns from a hypothetical 10-year biomass harvest in loblolly pine plantation using field studies in the Coastal Plain of North Carolina and the Virginia Piedmont testing combinations of tree genotype, planting density, and silviculture. Although enhanced varietal genotypes could yield more biomass, open-pollinated seedlings at 1,236–1,853 trees ha−1 under operational silviculture had the greatest returns at both sites, with mean whole-tree internal rates of return of 8.3%–9.9% assuming stumpage equal to current pulpwood prices. At a 5% discount rate, break-even whole-tree stumpage at the two sites in the optimal treatments was $8.72–$9.92 Mg−1, and break-even yield was 175–177 Mg ha−1 (roughly 18 Mg ha−1 yr−1 productivity), although stumpage and yield floors were higher if only stem biomass was treated as salable. Dedicated short-rotation loblolly biomass plantations in the region are more likely to be financially attractive when site establishment and maintenance costs are minimized. Study Implications: Our study suggests that dedicated loblolly pine plantations in the US Southeast may be managed to generate positive financial yields for biomass over relatively short (10 year) rotation windows, even at lower stumpage value than at present for pulpwood in the region (<80% current). Intensive use of costly inputs like fertilizer, vigorous chemical competition control, and elite genetics in planting stock did improve biomass yields. However, the management combinations that favored the highest financial returns emphasized the least expensive open-pollinated stock, lower-input operational silviculture, and moderate-to-high planting density.

Estimated realized gains for first-generation slash pine (Pinus elliottii var. elliottii) tree improvement in the southeastern United States

2004 ◽  
Vol 34 (12) ◽  
pp. 2587-2600 ◽  
Author(s):  
Rodrigo Vergara ◽  
Timothy L White ◽  
Dudley A Huber ◽  
Barry D Shiver ◽  
Donald L Rockwood
Keyword(s):  
United States ◽  
Rust Resistance ◽  
First Generation ◽  
Southeastern United States ◽  
Volume Growth ◽  
Pinus Elliottii ◽  
Slash Pine ◽  
Individual Tree ◽  
The University ◽  
Stand Yield

Realized gains from selection of the first-generation breeding population of slash pine (Pinus elliottii Engelm. var. elliottii) were estimated using data from 38 field trials planted in large rectangular plots in the southeastern United States. The trials consisted of material selected for volume growth and planted by the Cooperative Forest Genetics Research Program at the University of Florida (19 trials) and by the Plantation Management Research Cooperative at the University of Georgia (19 trials). All trials contained slash pine seedlots collected from unrogued or lightly rogued first-generation seed orchards. Analyses of variance detected, on average, moderate gains in rust resistance (I50 = 43.1%) and site index (4.3%) and important gains in individual tree volume (7.7%) and stand yield (10.2%). Silvicultural treatments and age by realized gains interactions were never significant, but significant interactions between seedlots and trials showed that realized gains are not consistent at all sites. Overall results were highly consistent with predicted breeding values for rust resistance, but lower than expected for volume. On average, realized gain in stand yield for first-generation material was approximately 10%, or an extra inside-bark volume of 25 m3·ha–1 (357 feet3·acre–1) at 25 years.

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