A wet oxidation procedure suitable for the determination of nitrogen and mineral nutrients in biological material

Parkinson, John; Allen, S. E.

doi:10.1080/00103627509366539

Cited by 1,237 publications

(637 citation statements)

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“…Mass of forest floor per unit area was calculated. The forest floor samples were analysed for concentrations of N, P, Ca, Mg, K, Mn, Fe, Zn, and Al (Parkinson and Allen 1975).…”

Section: Forest Floor and Mineral Soil Sample Collection And Analysismentioning

confidence: 99%

“…Each composite sample was composed of litterfall from three litter traps. The litterfall samples were analysed for concentrations of N, P, Ca, Mg, K, Mn, Fe, Zn, and Al (Parkinson and Allen 1975). …”

mentioning

confidence: 99%

“…Mass of forest floor per unit area was calculated. The forest floor samples were analysed for concentrations of N, P, Ca, Mg, K, Mn, Fe, Zn, and Al (Parkinson and Allen 1975).For the forest floor and the mineral soil samples collected at 5, 20, 50 and 100 cm depths at each site, pH was determined using a glass electrode-calomel electrode pH meter (Kalra and Maynard 1991). For the 5 and 20 cm depth samples, organic matter concentrations were determined using the mass-loss-due-to-ignition technique (Kalra and Maynard 1991).…”

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confidence: 99%

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Litterfall and soil characteristics in canopy gaps occupied by vine maple in a coastal western hemlock forest

Ogden¹,

Schmidt

1997

Can. J. Soil. Sci.

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. 1997. Litterfall and soil characteristics in canopy gaps occupied by vine maple in a coastal western hemlock forest. Can. J. Soil Sci. 77: 703-711-000. In some low-elevation coastal British Columbia forests, canopy gaps can be occupied by the hardwood tree species, vine maple (Acer circinatum). The objective of this study was to determine how vine maple gaps influence litterfall, litter decomposition, and forest floor and mineral soil properties. Measurements were made on six vine maple gaps paired with six conifer canopy plots. Vine maple gaps had significantly less conifer litterfall during the autumn, higher pH, and higher concentrations of Ca, Mg and K in the forest floor, thinner forest floors, and a weak tendency for lower C/N ratios, higher pH values and higher total N concentrations in the surface mineral soil. Vine maple litter was found to decompose significantly faster than conifer litter and to have higher concentrations of N, P, Ca, Mg, K, Fe and Zn. Decomposition rates of vine maple litter and of conifer litter did not differ significantly between vine maple gap and conifer canopy plots. Larger vine maple clones had significantly thicker forest floors with higher concentrations of Ca, and higher N concentrations and lower C/N ratios in the surface mineral soil than gaps with smaller vine maple clones. The results indicate that vine maple gaps may improve the nutritional status of the sites that they occupy within conifer forests.Key words: Litterfall, litter decomposition, soil-plant interactions, vine maple, canopy openings, canopy gaps Ogden, A. E. et Schmidt, M. G. 1997. Caractères de la litière fraiche et du sol dans les trouées d'une forêt côtière à pruche de l'Ouest ovvupées par l'érable circiné. Can. J. Soil Sci. 77: 703-711. Dans certaines forêts côtières de basse altitude de la Colombie-Britannique, les clairières peuvent être occupées par l'érable circiné (Acer circinatum). Nous avons cherché à déter-miner dans quelle mesure ces clairières à érable circiné influent sur les dépôts et sur la décomposition de la litière ainsi que sur les propriétés des couches organiques et minérales du sol forestier. Des mesures en paires étaient prises dans 6 clairières à érable circiné jumelées à 6 placettes sous couvert de conifères. Dans les clairières, la litière nouvelle contenait significativement moins d'aiguilles de conifères en automne. La couche organique était plus mince, son pH plus élevé et elle contenait plus de Ca, de Mg et de K. Les horizons minéraux supérieurs affichaient des rapports C/N plus bas, un pH plus élevé et des concentrations en N total plus fortes. La litière d'érable circiné se décomposait significativement plus vite que la litière de conifères et elle était plus riche en N, P, Ca, Mg, K, Fe et Zn. Les taux de décomposition des deux types de litière n'étaient pas statistiquement différents selon qu'il s'agissait d'une placette de clairière ou d'une placette sous pruche de l'Ouest. La couche organique du sol était plus épaisse et plus riche en Ca et la couche minérale plus ri...

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“…Mass of forest floor per unit area was calculated. The forest floor samples were analysed for concentrations of N, P, Ca, Mg, K, Mn, Fe, Zn, and Al (Parkinson and Allen 1975).…”

Section: Forest Floor and Mineral Soil Sample Collection And Analysismentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Litterfall and soil characteristics in canopy gaps occupied by vine maple in a coastal western hemlock forest

Ogden¹,

Schmidt

1997

Can. J. Soil. Sci.

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“…For the digestion of the dried ECM mycelia, samples were dried in the oven at 70°C, ground in a Wiley mill and passed through a 2-mm sieve screen. A 0.5 g quantity of the each sample was then digested in a sulfuric acid and hydrogen peroxide mix (Parkinson and Allen 1975). Determinations of P and K were made by Induction Coupled Plasma Optical Emission Spectrometer ICP-OES Optima 4300 DV (Perkin-Elmer, Waltham, MA, USA).…”

Section: Organic Acid Analyses By High Performance Liquid Chromatogramentioning

confidence: 99%

Mobilisation of potassium and phosphorus from iron ore by ectomycorrhizal fungi

Adeleke

Cloete

Bertrand

et al. 2010

World J Microbiol Biotechnol

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Mutualistic roles of ectomycorrhizal (ECM) fungi have been linked to their ability to produce organic acids that aid in the dissolution of insoluble minerals in the rhizosphere. This ability of ECM fungi was utilised to investigate their potential participation in the mobilisation of nutrients such as phosphorus (P) and potassium (K) from a typical insoluble ore-iron ore. In vitro pure cultures of four different ECM fungi; Pisolithus tinctorius, Paxillus involutus, Phialocephala fortini, and Suillus tomentosus were screened for their ability to mobilise P and K from two types of non-exportable Sishen iron ore. When present in iron ore, these elements are deleterious and reduce the commercial values of the ore. Experiment was set up with different treatments that included two ore types (KGT and SK) and five particle sizes of each ore type. Results indicated the potential of the four fungi to mobilise P and K from the two iron ore types though at different levels. Ore type, particle size, organic acid production and attachment of the fungi to the iron ore were all found to play important roles in the mobilisation of nutrients from these ores.

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“…Standard soil test procedures for observation and analysis in Chinese ecosystem research network were used (Editorial Committee, 1996). TN was determined by the semi-micro Kjeldahl method, and TP was determined colorimetrically after wet digestion with H 2 SO 4 + HClO 4 (Parkinson and Allen, 1975). AN was determined by using a micro-diffusion technique after alkaline hydrolysis (Conway, 1978).…”

Section: Soil Sampling and Measurementsmentioning

confidence: 99%

Analysis on soil nutrient characteristics for sustainable land use in Danangou catchment of the Loess Plateau, China

Wang

Yang

et al. 2003

CATENA

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Understanding of the characteristics of soil organic matter (SOM) and soil nutrients at the field and catchment scale is important for refining agricultural management practices and for improving sustainable land use. In order to analyze on SOM and nutrient differences among different land use types and their relationships between land use, landscape position and slope aspect, 94 sampling sites including 7 land uses were selected along 6 transects in the Danangou catchment with an area of 3.5 km 2 on the Loess Plateau of China. Significant differences in SOM, total N (TN), available N (AN) and available P (AP) among these land uses were found. Higher values in SOM, TN and AN were measured in soils from woodland and grassland, but lower values in the soils from fallow land and cropland. Compare SOM and TN with cropland, intercropping land had high contents. The adjusted R 2 values of regression models for SOM and nutrients with land use, landscape position and slope aspect ranged from 0.501 (SOM) to 0.134 (AP). A comparison between average predicted and measured values for SOM and each soil nutrient revealed that the predicted values in TP and AN for each land use, in SOM and TN except for fallow land and in AP except for intercropping land, shrub land and woodland, fell with in a 95% confidence interval about the measured values. The simplified predicted models of soil nutrients combined with the key value of SOM for soil quality can serve to improve agricultural practices and to provide useful information on sustainable land use. Improvement in SOM and nutrients would be expected from more C inputs including manure and crop residues and alternative cultivation practices such as developing intercropping system, building terrace for soil and water conservation, return the cropland with SOM content less than a key value of 0.44% to the grassland and woodland on the hilly areas similar to the Loess Plateau of China. the same time, it is recommended that nitrogen fertilization addition could be decreased in the foot slope and increased on the upper slope. D

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A wet oxidation procedure suitable for the determination of nitrogen and mineral nutrients in biological material

Cited by 1,237 publications

References 3 publications

Litterfall and soil characteristics in canopy gaps occupied by vine maple in a coastal western hemlock forest

Litterfall and soil characteristics in canopy gaps occupied by vine maple in a coastal western hemlock forest

Mobilisation of potassium and phosphorus from iron ore by ectomycorrhizal fungi

Analysis on soil nutrient characteristics for sustainable land use in Danangou catchment of the Loess Plateau, China

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