Short-term impacts of nutrient manipulations on leaf gas exchange and biomass partitioning in contrasting 2-year-old Pinus taeda clones during seedling establishment

Tyree, Michael C.; Seiler, John R.; Maier, Chris A.

doi:10.1016/j.foreco.2009.02.001

Cited by 25 publications

(20 citation statements)

References 33 publications

(49 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This may be a result of decreased microbial activity following fertilization, which has been observed in numerous studies (Nohrstedt et al, 1989;Thirukkumaran and Parkinson, 2000;Blazier et al, 2005). Finally, our seedling growth data suggest that although we did observe a decrease in foliar N concentration with LR additions, our rates of LR incorporation did not result in N immobilization to a level that reduced growth (Tyree et al, 2009b).…”

Section: Objective 1: Soil Physical Properties and Macro Nutrientsmentioning

confidence: 50%

“…Each bar is an untransformed average of 48 observations and error bars represent ±one standard error from the mean. had greater fine-root mass and showed an increase in the fine-to coarse-root ratio at the end of the study (Tyree et al, 2009b). P. taeda clones have been shown to differ in their growth and allocation patterns in response to nutrient additions (Li et al, 1991;Retzlaff et al, 2001;King et al, 2008), but no studies that we are aware of have shown clonal differences in F S in conifer seedlings.…”

Section: Objective 3: Effect Of Genotype On Total Soil Co 2 Effluxmentioning

confidence: 88%

“…For example, on the final sampling date in June 2007 we found that fertilization resulted in a significant (p < 0.05) decrease in mineral soil K, Ca, and Mg levels. This decrease may have been due to an observed 13% reduction in soil pH in fertilized pots relative to control pots (5.23 and 6.02, respectively; p < 0.0001), increased uptake of K, Ca, and Mg following increased tree growth (Tyree et al, 2009b), or both.…”

Section: Objective 1: Soil Physical Properties and Macro Nutrientsmentioning

confidence: 99%

“…The second fertilization took place on March 16, 2007 and was applied in the form of AN, at a rate of 200 kg N ha À1 . Clonal seedlings (CL93 and CL85) were donated by Mead Westvaco and have been shown, in an accompanying experiment, to differ in their stem to foliage ratio and response to changes in fertility (Tyree et al, 2009b).…”

Section: Treatmentsmentioning

confidence: 99%

“…A short-term greenhouse experiment focusing on plant gas exchange and biomass partitioning found that LR incorporation, at low rates (equivalent to 25 Mg o.d. ha À1 ), had little effect on overall tree growth (Tyree et al, 2009b). Another study found that contrasting Pinus taeda clones grown in the field responded differently to LR incorporation with one clone being negatively affected while the other clone showed no effect (Tyree et al, 2009a).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Short-term impacts of soil amendments on belowground C cycling and soil nutrition in two contrasting Pinus taeda L. genotypes

Tyree

Seiler

Maier

2011

Forest Ecology and Management

Self Cite

View full text Add to dashboard Cite

Section: Objective 1: Soil Physical Properties and Macro Nutrientsmentioning

confidence: 50%

Section: Objective 3: Effect Of Genotype On Total Soil Co 2 Effluxmentioning

confidence: 88%

Section: Objective 1: Soil Physical Properties and Macro Nutrientsmentioning

confidence: 99%

Section: Treatmentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Short-term impacts of soil amendments on belowground C cycling and soil nutrition in two contrasting Pinus taeda L. genotypes

Tyree

Seiler

Maier

2011

Forest Ecology and Management

Self Cite

View full text Add to dashboard Cite

Genetic effects on transpiration, canopy conductance, stomatal sensitivity to vapour pressure deficit, and cavitation resistance in loblolly pine

et al. 2011

View full text Add to dashboard Cite

Physiological uniformity and genetic effects on canopy-level gas-exchange and hydraulic function could impact loblolly pine (Pinus taeda L.) plantation sustainability and ecosystem dynamics under projected changes in climate. Over a 1-year period, we examined genetic effects on mean and maximum mid-day canopy conductance (G s , G smax ) and transpiration (E, max-E) within a juvenile loblolly pine plantation composed of 'genotypes' (e.g. different genetic entries) from each of the three different genetic groups (clones, full-sibs, open-pollinated). We also compared reference canopy conductance (G s ref or G s at a vapour pressure deficit D D 1 kPa), maximum E (E max ) in response to D, stomatal sensitivity to D, specific hydraulic conductivity (k s ), and cavitation resistance among genotypes. Based on genetic and physiological principles, we hypothesized that (1) within genotypes, physiological uniformity will increase as inherent genetic diversity decreases and (2) genotypes with greater k s and higher canopy-level gas-exchange rates will be more sensitive to increases in D, and more susceptible to loss of k s . In our results, high-and low-genetic diversity genotypes showed no differences in E and G s uniformity over time. However, E and max-E were significantly different among genotypes, and genotypes showed significant seasonal variability in G s and G smax . Additionally, there were significant differences in E max , G s ref , G s sensitivity to D, and the pressure at which 50% loss of k s occurs (P 50 ) among individual genotypes. We found no relationship between mean hydraulic conductivity parameters and overall G s ref or G s sensitivity. However, the genotype full embolism point (P 88 ) and loss of k s rate (LC rate ) both showed a significant positive relationship with genotype G s ref during the spring, indicating that genotypes with higher G s were less resistant to cavitation. Overall, genetic effects on canopy-level gas-exchange and cavitation resistance were significant, implying that physiological differences among genotypes might affect stand water use, carbon gain, drought tolerance, and hydrologic processes. Contrary to our expectations, uniformity in physiological process rates did not increase as inherent genetic diversity decreased, suggesting that clonal genotypes exhibit high physiological plasticity under plantation conditions. Lastly, our results imply that genotypes with higher spring-time gas-exchange rates may be more susceptible to catastrophic loss of k s . With changes in climate expected to continue, physiological differences among genotypes may affect loblolly pine plantation carbon and water cycling.

show abstract

Soil Microbes: The Invisible Managers of Soil Fertility

Sathya

Vijayabharathi

Gopalakrishnan

2016

Microbial Inoculants in Sustainable Agricultural Productivity

View full text Add to dashboard Cite

Short-term impacts of nutrient manipulations on leaf gas exchange and biomass partitioning in contrasting 2-year-old Pinus taeda clones during seedling establishment

Cited by 25 publications

References 33 publications

Short-term impacts of soil amendments on belowground C cycling and soil nutrition in two contrasting Pinus taeda L. genotypes

Short-term impacts of soil amendments on belowground C cycling and soil nutrition in two contrasting Pinus taeda L. genotypes

Genetic effects on transpiration, canopy conductance, stomatal sensitivity to vapour pressure deficit, and cavitation resistance in loblolly pine

Soil Microbes: The Invisible Managers of Soil Fertility

Contact Info

Product

Resources

About