Individual tree crown and stand development in Pinus taeda under different fertilization and irrigation regimes

Albaugh, Timothy J.; Allen, H. Lee; Fox, Thomas R.

doi:10.1016/j.foreco.2006.05.074

Cited by 36 publications

(23 citation statements)

References 42 publications

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“…Tree growth is initially rapid but then slows as nutrient availability declines and nutrient deficiency develops [18,62]. Albaugh et al (2006) [65] showed that height growth decreased through time at a sandy site in North Carolina that was similar to the soil at the site in Kershaw, South Carolina where the observed height growth decreased significantly in the later stages of stand development in the control plots. This suggests that FR should vary through time to more accurately predict soil nutrient availability on the sandy soils.…”

Section: Discussionmentioning

confidence: 99%

Determination of Fertility Rating (FR) in the 3-PG Model for Loblolly Pine Plantations in the Southeastern United States Based on Site Index

Subedi

Fox

Wynne

2015

Forests

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Soil fertility is an important component of forest ecosystems, yet evaluating soil fertility remains one of the least understood aspects of forest science. We hypothesized that the fertility rating (FR) used in the model 3-PG could be predicted from site index (SI) for loblolly pine in the southeastern US and then developed a method to predict FR from SI to test this hypothesis. Our results indicate that FR values derived from SI when used in 3-PG explain 89% of the variation in loblolly pine yield. The USDA SSURGO dataset contains SI values for loblolly pine for the major soil series in most of the counties in the southeastern US. The potential of using SI from SSURGO data to predict regional productivity of loblolly pine was assessed by comparing SI values from SSURGO with field inventory data in the study sites. When the 3-PG model was used with FR values derived using SI values from SSURGO database to predict loblolly pine productivity across the broader regions, the model provided realistic outputs of loblolly pine productivity. The results of this study show that FR values can be estimated from SI and used in 3-PG to predict loblolly pine productivity in the southeastern US.

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Section: Discussionmentioning

confidence: 99%

Determination of Fertility Rating (FR) in the 3-PG Model for Loblolly Pine Plantations in the Southeastern United States Based on Site Index

Subedi

Fox

Wynne

2015

Forests

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“…Brix, 1981), and fertilization can significantly accelerate mortality and reduce branch longevity (e.g. Albaugh et al, 2006). The only apparent point of disagreement is lower probability of mortality after 4 years.…”

Section: Branch Mortalitymentioning

confidence: 99%

“…Short and Burkhart, 1992) have been shown to significantly influence crown recession rates, but validation of this process at the individual branch-level has been minimal. However, Albaugh et al (2006) recently did find that fertilization reduced individual branch longevity.…”

Section: Introductionmentioning

confidence: 99%

Response of branch growth and mortality to silvicultural treatments in coastal Douglas-fir plantations: Implications for predicting tree growth

Weiskittel

Maguire

Monserud

2007

Forest Ecology and Management

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“…However, in typical stands, the assart effect and effects from early rotation or time of planting treatments would likely be diminished before a midrotation fertilizer treatment would be applied (8-10 years of age) [17]. Once leaf area levels are reduced through a lack of resources, it may take up to three years to build the crown back up to a high level of leaf area [18]. Given these conditions, it is likely that the productive potential of many sites may not be achieved without the application of additional resources (nitrogen and phosphorus, in this case) prior to midrotation.…”

Section: Introductionmentioning

confidence: 99%

Juvenile Southern Pine Response to Fertilization Is Influenced by Soil Drainage and Texture

Albaugh

Fox

Allen

et al. 2015

Forests

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Abstract:We examined three hypotheses in a nutrient dose and application frequency study installed in juvenile (aged 2-6 years old) Pinus stands at 22 sites in the southeastern United States. At each site, eight or nine treatments were installed where nitrogen was applied at different rates (0, 67, 134, 268 kg ha −1 ) and frequencies (0, 1, 2, 4 and 6 years) in two or four replications. Phosphorus was applied at 0.1 times the nitrogen rate and other elements were added as needed based on foliar nutrient analysis to insure that nutrient imbalances were not induced with treatment. Eight years after treatment initiation, the site responses were grouped based on texture and drainage characteristics: soil group 1 consisted of poorly drained soils with a clayey subsoil, group 2 consisted of poorly to excessively drained spodic soils or soils without a clay subsoil, and group 3 consisted of well-drained soils with a clayey subsoil. We accepted the first hypothesis that site would be a significant factor explaining growth responses. Soil group was also a significant factor explaining growth response. We accepted our second hypothesis that the volume growth-cumulative dose response function was not linear. Volume growth reached an asymptote in soil groups 1 and 3 between cumulative nitrogen doses of 300-400 kg ha −1 . Volume growth responses continued to increase up to 800 kg ha −1 of cumulatively applied nitrogen for soil group 2. We accepted our third hypothesis that application rate and frequency did not influence the growth response when the cumulative nitrogen dose was equivalent. There was no difference in the of nitrogen was applied as four applications of 67 kg ha −1 every two years or as two applications of 134 kg ha −1 every four years. Clearly, the sites examined here were limited by nitrogen and phosphorus, and applications of these elements to young stands effectively ameliorated these limitations. However, there were differences in the response magnitude that were related to soil texture and drainage. Juvenile fertilizer applications resulted in high stocking levels early in the rotation; this condition should be considered when undertaking juvenile fertilization programs.

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Individual tree crown and stand development in Pinus taeda under different fertilization and irrigation regimes

Cited by 36 publications

References 42 publications

Determination of Fertility Rating (FR) in the 3-PG Model for Loblolly Pine Plantations in the Southeastern United States Based on Site Index

Determination of Fertility Rating (FR) in the 3-PG Model for Loblolly Pine Plantations in the Southeastern United States Based on Site Index

Response of branch growth and mortality to silvicultural treatments in coastal Douglas-fir plantations: Implications for predicting tree growth

Juvenile Southern Pine Response to Fertilization Is Influenced by Soil Drainage and Texture

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