Availability of residual phosphorus fertilizer for loblolly pine

Everett, Charles J.; Palm-Leis, Hugo

doi:10.1016/j.foreco.2008.11.029

Cited by 33 publications

(9 citation statements)

References 18 publications

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“…The allocation of at least 50% of litter P in soluble fractions suggests that P will be readily released from the litter into the mineral soil. The high proportion (80%-90%) of litter N in the residual fraction suggests the opposite for N. A sustained growth response to P fertilization has been observed in numerous studies [30][31][32][33][34]. Results suggest this sustained growth response to P fertilization could be due to efficient cycling of P from the mineral soil into the foliage and then, release from the litter back into the soil to begin the cycle again.…”

Section: Discussionmentioning

confidence: 83%

“…Efficient management of site N and P capital is therefore, essential. Studies suggest that management of site P capital is much less of an issue relative to N. In acidic soils across of range of textures, fertilization resulted in an accumulation of P in the mineral soil suggesting increased site P availability and a potential long-term improvement in tree growth from higher P nutrition [5,[30][31][32][33][34]. However, on sandy mineral soils, fertilization with N mainly resulted in increases in forest floor N compared to mineral soil N [4,5].…”

Section: Discussionmentioning

confidence: 99%

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Foliage and Litter Chemistry, Decomposition, and Nutrient Release in Pinus taeda

Kiser

Fox

Carlson

2013

Forests

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Following fertilization of forest plantations, high accumulations of nutrients in the forest floor creates the need to assess rates of forest floor decomposition and nutrient release. The study site was a 25-year old experimental loblolly pine plantation in the North Carolina Sandhills Region. Soluble and insoluble N, P, carbohydrate and phenol-tannin fractions were determined in foliage and litter by extraction with trichloroacetic acid. The long-term forest floor decomposition rate and decomposition and nutrient release in an experiment simulating removal of the overstory canopy were also determined. In litter, insoluble protein-N comprised 80%-90% of total-N concentration while soluble inorganic-and organic-P comprised 50%-75% of total-P concentration explaining forest floor N accumulations. Fertilization did not increase soluble carbohydrates in litter and forest floor decomposition rates. Loblolly pine forest floor decomposing in environmental conditions simulating removal of the overstory canopy was greatly accelerated and indicated 75% mass loss and release of 80% of the N pool within one year. This could result in a loss of substantial quantities of N at harvest due to low N uptake by seedlings in the newly planted next rotation suggesting management of the forest floor at harvest is essential to conserve site N capital in these N limited systems. OPEN ACCESSForests 2013, 4 596

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Section: Discussionmentioning

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Foliage and Litter Chemistry, Decomposition, and Nutrient Release in Pinus taeda

Kiser

Fox

Carlson

2013

Forests

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“…As previously suggested [15], additional P fertilization may be needed early in the next pine rotation for optimal short-term P availability. Phosphorus fertilization rates higher than 81 kg P ha −1 were less efficient, probably due to event-specific losses and long-term surface and subsurface lateral flow.…”

Section: P Availabilitymentioning

confidence: 87%

“…Growth responses to P fertilization on medium or fine-textured, weathered soils may last over 50 years [9] and may be evident in a second rotation following harvest [13,14]. This long-term availability has been determined in Atlantic Coastal Plain Ultisols [13,15], New Zealand Ultisols [13], Australian Ultisols [9,14,16], Swedish Spodosols [17] and to some degree in Piedmont Ultisols [18] but long-term availability of fertilizer P in the highly weathered, Fe and Al-rich upland Alfisols and Ultisols of the western Gulf Coastal Plain has not been documented. In addition, little data is available to determine how long-term P availability relates to initial fertilizer rate.…”

Section: Introductionmentioning

confidence: 99%

Phosphorus Fertilizer Rate, Soil P Availability, and Long-Term Growth Response in a Loblolly Pine Plantation on a Weathered Ultisol

Bliss

2012

Forests

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Abstract:Phosphorus is widely deficient throughout the southern pine region of the United States. Growth responses to P fertilization are generally long-lasting in a wide range of soil types, but little is known about fertilization rates and long-term P cycling and availability. In 1982, exceptionally high P fertilization rates (0, 81, 162, and 324 kg P ha −1 )were applied to a loamy Ultisol in central Louisiana, USA. We measured vegetation responses at age 27 years and sequentially extracted soil P to 1 m to elucidate potential P availability into the next rotation. Loblolly pine responded well to the lowest fertilization rate; total biomass was 39% greater in the fertilized plots compared to the unfertilized plots, but higher fertilization rates had no effect, presumably due to induced N-limitations. What little fertilizer P was found in the soils was in the moderately labile NaOH fraction in the surface 20 cm, and may be slowly available to the next pine rotation. Normal rates of P fertilizer will maintain elevated available P well into a second rotation in loamy Pleisteocene Ultisols of the western Gulf Coastal Plain. Exceptionally high rates were not effective at increasing potentially available P beyond normal rates.

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“…Unlike N, P fertilization is proposed to also benefit the site by increasing mineral soil P leading to a long-term increase in P availability (Pritchett and Comerford, 1982;Fox et al, 2011). A single application of P has been found to increase tree growth throughout the rotation and potentially in subsequent rotations across a range of forest soils and tree species (Ballard, 1978;Gentle et al, 1986;Comerford et al, 2002;Crous et al, 2007;Everett and Palm-Leis, 2009). …”

Section: Soil Accumulation Of Nitrogen and Phosphorus Following Annuamentioning

confidence: 99%

Soil Accumulation of Nitrogen and Phosphorus Following Annual Fertilization of Loblolly Pine and Sweetgum on Sandy Sites

Kiser

Fox

2012

Soil Science Soc of Amer J

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A key question that arises following fertilization of forest plantations in the southeastern United States is whether fertilization has a long-term effect on nutrient availability and long-term site quality. Site quality could improve if mineral soil N and P pools are increased but is less likely if only forest fioor pools are increased. Rapid forest floor decomposition and nutrient release following harvest likely lead to only rotation-length increases in nutrient availability. To examine the impact of repeated applications of N and P, forest floor and mineral soil N and P pools were measured at a 24-yr-old lohlolly pine {Pinus taeda L.) plantation in North Carolina (Southeast Tree Research and Education Site [SETRES]) and 13-yr-old lohlolly pine and sweetgum {Liquidambar styradflua L.) plantations in Georgia (Mt. Pleasant) receiving annual incremental fertilizer applications totaling >1000 kg N ha~i and >160 kg P ha~i. Mineral soil N pools varied only slightly. In contrast, fertilization increased forest floor N pools hy 300 kg N ha~^ at SETRES. Long-term impacts on site N availability and site quality following these large N applications are unlikely. The forest floor P pool at SETRES was increased by 19.8 kg P ha~^ Fertilization also increased the mineral soil extractahle P pool at SETRES to a depth of 1.5 m hy 56 kg P ha~i but not at Mt. Pleasant where P fertilization during the previous rotation may have already increased this pool. Observed increases in mineral soil P from fertilization indicated a potential for increased long-term site quality in terms of higher P availability for future rotations.

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Availability of residual phosphorus fertilizer for loblolly pine

Cited by 33 publications

References 18 publications

Foliage and Litter Chemistry, Decomposition, and Nutrient Release in Pinus taeda

Foliage and Litter Chemistry, Decomposition, and Nutrient Release in Pinus taeda

Phosphorus Fertilizer Rate, Soil P Availability, and Long-Term Growth Response in a Loblolly Pine Plantation on a Weathered Ultisol

Soil Accumulation of Nitrogen and Phosphorus Following Annual Fertilization of Loblolly Pine and Sweetgum on Sandy Sites

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