Impacts of timber harvest intensity and P fertilizer application on soil P fractions

Rocha, José Henrique Tertulino; Menegale, Marcella L.C.; Rodrigues, Marcos; Gonçalves, José Leonardo de Moraes; Pavinato, Paulo Sérgio; Foltran, Estela Couvre; Harrison, Robert; James, Jason

doi:10.1016/j.foreco.2019.01.051

Cited by 29 publications

(13 citation statements)

References 42 publications

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“…Most of the mineral soil P was in inorganic (70%) form. This is in accordance with the findings of Rocha et al (2019), reporting 30% of P in organic against 70% in inorganic forms in the soil of the Eucalyptus grandis plantations at harvest after 12-year growth at Itatinga, São Paulo, Brazil. Our findings suggest that the lower extractable P in the mineral soil in the mixed-species stands (Fig.…”

Section: P In Mineral Soilssupporting

confidence: 92%

Organic matter quality of forest floor as a driver of C and P dynamics in acacia and eucalypt plantations established on a Ferralic Arenosols, Congo

et al. 2020

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Background: Land-use change and forest management may alter soil organic matter (SOM) and nutrient dynamics, due in part to alterations in litter input and quality. Acacia was introduced in eucalypt plantations established in the Congolese coastal plains to improve soil fertility and tree growth. Eucalypt trees were expected to benefit from N 2 fixed by acacia. However, some indicators suggest a perturbation in SOM and P dynamics might affect the sustainability of the system in the medium and long term. In tropical environments, most of the nutrient processes are determined by the high rates of organic matter (OM) mineralization. Therefore, SOM stability might play a crucial role in regulating soil-plant processes. In spite of this, the relationship between SOM quality, C and other nutrient dynamics are not well understood. In the present study, OM quality and P forms in forest floor and soil were investigated to get more insight on the C and P dynamics useful to sustainable management of forest plantations. Methods: Thermal analysis (differential scanning calorimetry (DSC) and thermogravimetry (TGA)) and nuclear magnetic resonance (solid state 13 C CPMASS and NMR and 31 P-NMR) spectroscopy have been applied to partially decomposed forest floor and soils of pure acacia and eucalypt, and mixed-species acacia-eucalypt stands. Results: Thermal analysis and 13 C NMR analysis revealed a more advanced stage of humification in forest floor of acacia-eucalypt stands, suggesting a greater microbial activity in its litter. SOM were related to the OM recalcitrance of the forest floor, indicating this higher microbial activity of the forest floor in this stand might be favouring the incorporation of C into the mineral soil.

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Section: P In Mineral Soilssupporting

confidence: 92%

Organic matter quality of forest floor as a driver of C and P dynamics in acacia and eucalypt plantations established on a Ferralic Arenosols, Congo

et al. 2020

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“…Extractable P has been found to be declining during a rotation of acacia [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Slash and litter retention in eucalypt plantations in Brazil affected the various pools of P in the soil [27]. While we do not yet have a good understanding of the dynamics of soil P and its relationships with stand growth in our experimental ecosystem, it is important to recognize from a management perspective, that even when site organic matter was conserved, incorporation of fertilizer P in the planting hole and increasing the supply in the immediate vicinity of the roots improved wood volume at harvest.…”

Section: Productivity Of Successive Rotationsmentioning

confidence: 99%

“…In contrast, synthesis of results on eucalypts from several comparable studies in the tropics and subtropics show significant loss of yield when organic matter was removed during the inter-rotation management from sites [11,12,29]. Such adverse effects tend to be highly pronounced in light textured, low nutrient soils [30], and the effects can be nutrient specific as illustrated by the pronounced effects on the supply of and response to K [27,29,31].…”

Section: Productivity Of Successive Rotationsmentioning

confidence: 99%

Productivity of Eucalyptus pellita in Sumatra: Acacia mangium Legacy, Response to Phosphorus, and Site Variables for Guiding Management

Hardiyanto

Inail²,

Nambiar

2021

Forests

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We report on experimental studies conducted in South Sumatra with interrelated objectives to (i) examine the trends in production covering 30 years, including three rotations of Acacia mangium followed by Eucalyptus pellita which replaced A. mangium for managing the widespread threat of diseases; (ii) understand the effects of inter-rotation slash and litter management applied to acacia (legacy effects) on E. pellita growth; (iii) assess the long term changes in the top soil layer arising from above; (iv) evaluate, through a network of experiments, across the landscape, the nature and extent of growth responses to additional phosphorus. This data was also used to explore some of the critical site and stand variables which determine the variations in productivity and responses to management. The current growth rates of E. pellita are lower than those achieved in A. mangium. The management-legacy effects by conserving site resources provides a sustainable base for the growth of E. pellita, but for further increase in productivity, additional management actions are necessary. Changes in soil pH, carbon, N and extractable P were relatively small after four rotations. Supply of P at planting gave wood volume gains at harvest, ranging from 16 to 66% across sites. The plinthite layer in the soil profile was related to productivity, with higher growth rates of E. pellita occurring when the plinthite was at deeper layers. There is much scope for increasing productivity per unit area in this landscape, and available knowledge can be synthesized into a package of best practices for application. Management should aim to improve the quality of inter-rotation management to ensure more than 90% survival, and fast growth rates during the first 2 years. We provide a framework for further research and for refining management to produce the much needed additional domestic wood supply for the local industry.

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“…Histosols d and Histosls w : means of the three drained and three rewetted peatlands of the present study, respectively. Sources: [46][47][48][49][50][51][52][53][54][55][56][57][58].…”

Section: Phosphorus Fractionsmentioning

confidence: 99%

Phosphorus Speciation in Long-Term Drained and Rewetted Peatlands of Northern Germany

et al. 2020

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Previous studies, conducted at the inception of rewetting degraded peatlands, reported that rewetting increased phosphorus (P) mobilization but long-term effects of rewetting on the soil P status are unknown. The objectives of this study were to (i) characterize P in the surface and subsurface horizons of long-term drained and rewetted percolation mires, forest, and coastal peatlands and (ii) examine the influence of drainage and rewetting on P speciation and distributions using wet-chemical and advanced spectroscopic analyses. The total P was significantly (p < 0.05) different at the surface horizons. The total concentration of P ranged from 1022 to 2320 mg kg−1 in the surface horizons and decreased by a factor of two to five to the deepest horizons. Results of the chemical, solution 31P nuclear magnetic resonance (NMR), and P K-edge X-ray absorption near-edge structure (XANES) indicated that the major proportions of total P were organic P (Po). In the same peatland types, the relative proportions of Po and stable P fractions were lower in the drained than in the rewetted peatland. The results indicate that long-term rewetting not only locks P in organic matter but also transforms labile P to stable P fractions at the surface horizons of the different peatland types.Soil Syst. 2020, 4, 11 2 of 20 dynamic and may be taken up by microbes and plants, lost by leaching and drainage, and form secondary P minerals [8,9]. Thus, a complete account of P species is required to predict the P mobilization or stabilization potential in long-term drained and rewetted peatland types [10,11].Phosphorus transformations can vary according to management practices, peatland types, topographic positions, historic, and current land use types [12]. For instance, when a peat soil predominated by redox-sensitive elements is rewetted, P mobilization and release of soluble P species can occur by the reductive dissolution of binding partners of phosphate, especially pedogenic Fe-(oxy)hydroxides [6,13,14]. However, there is no information on the influence of long-term drainage and rewetting of percolation mires, forest, and coastal peatlands.Traditional wet chemical and advanced spectroscopic analytical techniques such as sequential P fractionation, solution 31 P nuclear magnetic resonance (NMR), and X-ray absorption near edge structure (XANES) spectroscopy have been used successfully to investigate P species in mineral soils and other environmental samples [15]. However, none of these analytical techniques can decipher P species independently because of the complex chemical and biochemical processes of P such as dissolution-precipitation, sorption-desorption, mineralization-immobilization, and oxidation-reduction [16]. Thus, the combined use of wet chemical and spectroscopic analytical techniques could provide detailed information on the impacts of management practices on various P species distributions and transformations.About 30,000 ha of degraded peatlands have been rewetted in Mecklenburg-West Pomerania, northern German since the mid-1...

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Impacts of timber harvest intensity and P fertilizer application on soil P fractions

Cited by 29 publications

References 42 publications

Organic matter quality of forest floor as a driver of C and P dynamics in acacia and eucalypt plantations established on a Ferralic Arenosols, Congo

Organic matter quality of forest floor as a driver of C and P dynamics in acacia and eucalypt plantations established on a Ferralic Arenosols, Congo

Productivity of Eucalyptus pellita in Sumatra: Acacia mangium Legacy, Response to Phosphorus, and Site Variables for Guiding Management

Phosphorus Speciation in Long-Term Drained and Rewetted Peatlands of Northern Germany

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