Some factors in low‐temperature storage influencing the mineralisable‐nitrogen of soils

Harding, Damien; Ross, D. J.

doi:10.1002/jsfa.2740151203

Cited by 108 publications

(34 citation statements)

References 13 publications

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“…Results vary considerably among studies in the literature that examine effects of freezing on soil N. Harding and Ross (1964) found that thawing after freezing at -20 8C increased net N mineralization and nitrification in some, but not all, soils examined, concluding that moisture and C contents of soils may influence this response. The field-based snow manipulation study at Hubbard Brook Experimental Forest found that freezing (brought about by experimentally removing snowpack) resulted in increases in soil NO 3 and enhanced loss of N in soil solution, but did so without significantly influencing net nitrification Groffman et al 2001aGroffman et al , 2001b.…”

Section: Effects Of Freezing On Net N Mineralization and Net Nitrificmentioning

confidence: 90%

Effects of experimental freezing on soil nitrogen dynamics in soils from a net nitrification gradient in a nitrogen-saturated hardwood forest ecosystem

2010

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This study examined effects of soil freezing on N dynamics in soil along an N processing gradient within a mixed hardwood dominated watershed at Fernow Experimental Forest, West Virginia. Sites were designated as LN (low rates of N processing), ML (moderately low), MH (moderately high), and HN (high). Soils underwent three 7-day freezing treatments (0, -20, or -80 8C) in the laboratory. Responses varied between temperature treatments and along the gradient. Initial effects differed among freezing treatments for net N mineralization, but not nitrification, in soils across the gradient, generally maintained at LN < ML MH < HN for all treatments. Net N mineralization potential was higher following freezing at -20 and -80 8C than control; all were higher than at 0 8C. Net nitrification potential exhibited similar patterns. LN was an exception, with net nitrification low regardless of treatment. Freezing response of N mineralization differed greatly from that of nitrification, suggesting that soil freezing may decouple two processes of the soil N cycle that are otherwise tightly linked at our site. Results also suggest that soil freezing at temperatures commonly experienced at this site can further increase net nitrification in soils already exhibiting high nitrification from N saturation.Résumé : Nous avons étudié les effets du gel du sol sur la dynamique de N dans le sol le long d'un gradient de transformation de N dans un bassin versant dominé par des feuillus mélangés à la Forêt expérimentale de Fernow, en Virginie-Occidentale. Les stations ont été classées sur la base du taux de transformation de N: LN (faible), ML (modérément faible), MH (modérément élevé) et HN (élevé). Les sols ont subi trois périodes de gel de 7 jours (0, -20 ou -80 8C) en laboratoire. Les réactions ont varié selon la température ainsi que le long du gradient. Les effets initiaux étaient différents selon l'intensité du gel dans le cas de la minéralisation nette mais pas dans le cas de la nitrification dans les sols le long du gradient qui s'est généralement maintenu à LN < ML < MH < HN avec tous les traitements. Le potentiel de minéralisation nette de N était plus élevé à la suite d'un gel à -20 et -80 8C que chez le témoin et plus élevé qu'à 0 8C dans tous ces traitements. Le potentiel de nitrification nette suivait le même patron. La station LN faisait exception: la nitrification nette était faible peu importe le traitement. La réponse de la minéralisation de N au gel était très différente de celle de la nitrification, indiquant que le gel du sol peut découpler deux processus du cycle de N dans le sol qui sont par ailleurs étroite-ment reliés dans notre site. Les résultats indiquent aussi que le gel du sol à des températures qui surviennent couramment dans ce site peut augmenter davantage la nitrification nette dans les sols où la nitrification est déjà élevée à cause de la saturation en N.[Traduit par la Rédaction]

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Section: Effects Of Freezing On Net N Mineralization and Net Nitrificmentioning

confidence: 90%

Effects of experimental freezing on soil nitrogen dynamics in soils from a net nitrification gradient in a nitrogen-saturated hardwood forest ecosystem

2010

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“…Water-holding capacities were determined on 50 g samples of soil (Harding and Ross 1964). pH was measured in a soil to water suspension of 1: 2.5.…”

Section: Methodsmentioning

confidence: 99%

Nitrogen mineralisation in soils from Whakatane, New Zealand, in relation to their suitability for growing tobacco

Ross¹

1966

New Zealand Journal of Agricultural Research

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Mineralisation of nitrogen was studied in some Whakatane, New Zealand, soils recently converted from permanent pasture and currently under trial for the cultivation of tobacco. Amounts of nitrate and mineral-nitrogen formed on incubation were much higher than those in high-quality tobacco soils from Motueka and were comparable to those in other soils sampled under grass-clover pasture. The Whakatane soils contained about 2.5% to 4.0% allophane, which appeared to have little influence on rates of mineralisation, probably because of its low concentration.Laboratory determinations of mineralisable-nitrogen appeared to provide a reliable guide for the behaviour of these Whakatane soils in the field. In initial plantings of tobacco on these soils, yields were low and, due to excess available nitrogen, the quality of the crops was poor. When the total and mineralisable-nitrogen of the soils decreased on continued cultivation, the quality of the tobacco crop improved considerably.

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“…Determination of water holding capacity was done by adapting the method used by Shinohara et al (1999) and followed by Harding and Ross (1964). By using filtered funnel with the lower part plugged with stopper, media samples were saturated in water at a ratio of 1 media: 2 water and left overnight.…”

Section: Water Holding Capacitymentioning

confidence: 99%

A Study on the Physical and Hydraulic Characteristics of Cocopeat Perlite Mixture as a Growing Media in Containerized Plant Production

Ilahi¹,

Ahmad²

2017

JSM

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Some factors in low‐temperature storage influencing the mineralisable‐nitrogen of soils

Cited by 108 publications

References 13 publications

Effects of experimental freezing on soil nitrogen dynamics in soils from a net nitrification gradient in a nitrogen-saturated hardwood forest ecosystem

Effects of experimental freezing on soil nitrogen dynamics in soils from a net nitrification gradient in a nitrogen-saturated hardwood forest ecosystem

Nitrogen mineralisation in soils from Whakatane, New Zealand, in relation to their suitability for growing tobacco

A Study on the Physical and Hydraulic Characteristics of Cocopeat Perlite Mixture as a Growing Media in Containerized Plant Production

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