Insect community response to switchgrass intercropping and stand age of loblolly pine (Pinus taeda ) plantations

2017 ◽  
Vol 20 (2) ◽  
pp. 217-227 ◽  
Author(s):  
Myung-Bok Lee ◽  
Joshua W. Campbell ◽  
Darren A. Miller ◽  
James A. Martin
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Community Response ◽  
Stand Age ◽  
Insect Community

Effects of competition control and annual nitrogen fertilization on gas exchange of different-aged Pinus taeda

2003 ◽  
Vol 33 (6) ◽  
pp. 1076-1083 ◽  
Author(s):  
Gregory T Munger ◽  
Rodney E Will ◽  
Bruce E Borders
Keyword(s):  
Gas Exchange ◽  
Pinus Taeda ◽  
Loblolly Pine ◽  
Positive Impact ◽  
Leaf Gas Exchange ◽  
Nitrogen Concentration ◽  
Net Photosynthesis ◽  
Stand Age ◽  
Competition Control ◽  
Pinus Taeda L

To determine the importance of competition control and annual fertilization on leaf gas exchange, light-saturated net photosynthesis (Asat), stomatal conductance (gs), and internal CO2 concentration (Ci) were measured multiple times in different-aged loblolly pine (Pinus taeda L.) stands growing at a Piedmont (BF Grant) and Coastal Plain (Waycross) location in Georgia, U.S.A. At both locations, competition control decreased Asat and gs (Asat from 4.53 to 4.12 µmol·m–2·s–1, gs from 0.058 to 0.050 mol·m–2·s–1 at BF Grant; Asat from 4.22 to 4.01 µmol·m–2·s–1, gs from 0.054 to 0.049 mol·m–2·s–1 at Waycross). Overall, fertilization did not have a positive impact on Asat, even though fertilization significantly increased foliar nitrogen concentration. At BF Grant, fertilization significantly decreased gs from 0.057 to 0.051 mol·m–2·s–1 and Ci from 217 to 205 µmol·mol–1. In addition, the decrease in Ci associated with fertilization became larger with stand age. At Waycross, fertilization decreased Ci from 211 to 203 µmol·mol–1 and the interaction between fertilization and stand age was significant for gs and Ci. These results indicate that silivcultural practices that increase resource availability and stand growth did not enhance leaf gas exchange.

Effects of annual fertilization and complete competition control on current annual increment, foliar development, and growth efficiency of different aged Pinus taeda stands

2002 ◽  
Vol 32 (10) ◽  
pp. 1728-1740 ◽  
Author(s):  
Rodney E Will ◽  
Gregory T Munger ◽  
Yujia Zhang ◽  
Bruce E Borders
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Coastal Plain ◽  
Growth Efficiency ◽  
Tree Size ◽  
Stand Age ◽  
Leaf Biomass ◽  
Age Difference ◽  
Annual Increment ◽  
Competition Control

The effects that competing vegetation and nitrogen limitation have on the current annual increment (CAI), leaf biomass, and growth efficiency (GE) of different aged loblolly pine (Pinus taeda L.) stands planted on a Piedmont and lower Coastal Plain location in Georgia, U.S.A. were determined by measuring stands receiving a factorial combination of complete interspecific competition control and annual nitrogen fertilization. At the Piedmont location, CAI increased with age (5, 10, and 12 years) as well as fertilization (7.3–9.2 Mg·ha–1) and competition control (6.8–9.6 Mg·ha–1). The effects of fertilization on leaf biomass increased with stand age (no difference at age 5 to 1.5 Mg·ha–1 difference at age 12), while the effects of competition control on leaf biomass decreased with stand age (difference of 2.5 Mg·ha–1 at age 5 to difference of 1.6 Mg·ha–1 at age 12). At the Coastal Plain location, fertilization increased CAI from 10.3 to 14.8 Mg·ha–1. Leaf biomass increased with competition control (4.9–5.5 Mg·ha–1) and fertilization (4.4–6.0 Mg·ha–1). Leaf biomass increased with stand age for the fertilized stands (5.3–7.0 Mg·ha–1 between age 7 and 13) and decreased with stand age for nonfertilized stands (4.9–4.0 Mg·ha–1 between age 7 and 13). At the Coastal Plain location, fertilization increased the GE of the age-7 stands from 2.34 to 2.86 but decreased the GE of the age-13 stands from 2.32 to 2.14. In general, GE decreased as mean tree size increased indicating that changes in GE related to treatments may be confounded with changes in tree size. Results of this experiment emphasize the importance of nutrition on stand growth as fertilization increased leaf biomass and may increase stem production per unit of foliage at early stages of development.

A comparison of methods for edge-bias compensation

1998 ◽  
Vol 28 (6) ◽  
pp. 942-945 ◽  
Author(s):  
Philip J Radtke ◽  
Harold E Burkhart
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Stand Age ◽  
Tree Crown ◽  
Individual Tree ◽  
Plot Size ◽  
Random Arrangement ◽  
Pinus Taeda L ◽  
Crown Closure ◽  
Bias Compensation

Ignoring the effects of off-plot trees on variables measured within a plot boundary may result in the under estimation problem known as edge bias. A number of edge bias compensation techniques have been proposed in the literature. Four of these were compared with the alternative of ignoring off-plot trees to determine their relative adequacy in modeling crown closure from individual tree crown measurements. Data from a spacing trial of loblolly pine (Pinus taeda L.) were used to make the comparisons. By shrinking the effective size of experimental plots, measurements of "off-plot" data were made available to compare with the results of edge-bias compensation models. Three edge-bias compensation algorithms were found to perform equivalently well: translation; reflection via a reflecting line through the edge trees; and a random arrangement of interior trees around the plot. The ability of the models to compensate for edge bias declined with stand age. Furthermore,the variability of compensation values increased with age and as plot size was reduced.

Amphibian and reptile community response to coarse woody debris manipulations in upland loblolly pine (Pinus taeda) forests

2008 ◽  
Vol 256 (12) ◽  
pp. 2078-2083 ◽  
Author(s):  
Audrey K. Owens ◽  
Kurtis R. Moseley ◽  
Timothy S. McCay ◽  
Steven B. Castleberry ◽  
John C. Kilgo ◽  
...  
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Coarse Woody Debris ◽  
Woody Debris ◽  
Community Response

scholarly journals Avian Community Response to Midrotation Herbicide Release and Prescribed Burning in Conservation Reserve Program Plantations

2008 ◽  
Vol 32 (3) ◽  
pp. 111-119 ◽  
Author(s):  
Brandon Sladek ◽  
L. Burger ◽  
Ian Munn
Keyword(s):  
Loblolly Pine ◽  
Prescribed Burning ◽  
Conservation Reserve Program ◽  
Volume Growth ◽  
Bird Species ◽  
Community Response ◽  
Individual Species ◽  
Avian Community ◽  
Disturbance Regimes ◽  
Pinus Spp

Abstract Former agricultural lands converted to pine (Pinus spp.) plantations in the Conservation Reserve Program (CRP) have potential to provide early successional (ES) habitat for many regionally declining pine/grassland and shrub-successional bird species if actively managed with appropriate disturbance regimes. One such regime is use of the selective herbicide Imazapyr (Arsenal Applicators Concentrate) and prescribed burning, which is permitted on CRP lands and cost share payments are available. This study quantified combined effects of Imazapyr and prescribed fire on the breeding season avian community characteristics and pine volume growth in thinned, midrotation afforested loblolly pine (Pinus taedaL.) plantations in Mississippi. Herbicide treatments were applied in fall of 2002 and winter burns were conducted during winter and early spring of 2002–2003. ES bird species richness was significantly greater in the treated plots compared with controls for both 2003 and 2004. Ten individual species exhibited treatment effects. These responses by ES bird species indicate that midrotation CRPplantations can provide needed ES habitat if treated with appropriate disturbance regimes.

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 Bedding and Fertilization Ameliorate Effects of Designated Wet-Weather Skid Trails after Four Years for Loblolly Pine (Pinus taeda) Plantations

1998 ◽  
Vol 22 (4) ◽  
pp. 222-226 ◽  
Author(s):  
W. Michael Aust ◽  
James A. Burger ◽  
William H. McKee ◽  
Gregory A. Scheerer ◽  
Mark D. Tippett
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Water Movement ◽  
Block Design ◽  
Site Preparation ◽  
Site Productivity ◽  
Mechanical Site Preparation ◽  
Wet Weather ◽  
Four Levels ◽  
Study Sites

Abstract Wet-weather harvesting operations on wet pine fiats can cause soil disturbances that may reduce long-term site productivity. Site preparation and fertilization are often recommended as ameliorative practices for such disturbances, but few studies have actually quantified their effects on restoration. The purposes of this study were to quantify the effects of wet-weather harvest traffic in designated skid trails on soil properties and loblolly pine (Pinus taeda) growth, and to evaluate the ameliorative effects of site preparation. Study sites were established on wet pine flats of the lower Coastal Plain within the Francis Marion National Forest (Berkeley County, SC). Treatments were arranged in a split-split plot within a randomized complete block design. Treatments were two levels of traffic (nontrafficked, trafficked), four levels of mechanical site preparation (none, disking, bedding, disking + bedding), and two levels of fertilization (none, 337 kg /ha of 10-10-10 fertilizer). initially, the trafficking increased soil bulk densities and reduced soil water movement and subsequent growth of loblolly pine (years 1 and 2). Bedding combined with fertilization restored site productivity to non trafficked levels within 4 yr, but disking or fertilization treatments alone were not effective at ameliorating the traffic effects. The effectiveness of the bedding and fertilization treatments for amelioration of traffic effects was probably facilitated by the relatively small area of disturbed skid trails (<10%) found on these sites. Areas having more severe disturbance or higher percentages of disturbance might not be ameliorated as rapidly. South. J. Appl. For. 22(4):222-226.

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