The effects of varying the nitrogen, sulphur, and phosphorus content of organic matter on its decomposition

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Abstract

The decomposition of a mixture of organic compounds was studied by measuring the evolution of carbon dioxide, and changes in the concentration of ammonium, sulphate, and phosphate. In one experiment the nitrogen supply was varied by varying the proportion of glycine in the mixture of organic compounds; in another the sulphur supply was varied by varying the proportion of cysteine; and in a third the phosphorus supply was varied by varying the proportion of sodium β-glycerophosphate.Mineralization of an element depended on the concentration of that element in the organic mixture. Mineralization of nitrogen did not occur until respiration had lowered the \arbon/nitrogen ratio to about 5 and mineralization of sulphur did not occur until respiration had lowered the carbon/sulphur ratio to about 50. On the other hand mineralization of phosphorus occurred before the carbon/phosphorus ratio had been reduced to any consistent figure. This may not be a characteristic of phosphorus mineralization but may have been caused by suboptimal supply of nitrogen.Mineralization of an element also depended on the concentration of other elements and, in general, reduced supplies of one element caused increased mineralization of others.

Original languageEnglish
Pages (from-to)317-330
Number of pages14
JournalAustralian Journal of Agricultural Research
Volume11
Issue number3
DOIs
Publication statusPublished - 1 Jan 1960

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Sulfur
Phosphorus
mineralization
sulfur
Nitrogen
organic matter
phosphorus
degradation
nitrogen
Respiration
Carbon
organic compounds
Ammonium Sulfate
Carbon Dioxide
Glycine
Cysteine
ammonium phosphates
carbon
glycine (amino acid)
ammonium sulfate

Cite this

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title = "The effects of varying the nitrogen, sulphur, and phosphorus content of organic matter on its decomposition",
abstract = "The decomposition of a mixture of organic compounds was studied by measuring the evolution of carbon dioxide, and changes in the concentration of ammonium, sulphate, and phosphate. In one experiment the nitrogen supply was varied by varying the proportion of glycine in the mixture of organic compounds; in another the sulphur supply was varied by varying the proportion of cysteine; and in a third the phosphorus supply was varied by varying the proportion of sodium β-glycerophosphate.Mineralization of an element depended on the concentration of that element in the organic mixture. Mineralization of nitrogen did not occur until respiration had lowered the \arbon/nitrogen ratio to about 5 and mineralization of sulphur did not occur until respiration had lowered the carbon/sulphur ratio to about 50. On the other hand mineralization of phosphorus occurred before the carbon/phosphorus ratio had been reduced to any consistent figure. This may not be a characteristic of phosphorus mineralization but may have been caused by suboptimal supply of nitrogen.Mineralization of an element also depended on the concentration of other elements and, in general, reduced supplies of one element caused increased mineralization of others.",
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TY - JOUR

T1 - The effects of varying the nitrogen, sulphur, and phosphorus content of organic matter on its decomposition

AU - Barrow, N. J.

PY - 1960/1/1

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N2 - The decomposition of a mixture of organic compounds was studied by measuring the evolution of carbon dioxide, and changes in the concentration of ammonium, sulphate, and phosphate. In one experiment the nitrogen supply was varied by varying the proportion of glycine in the mixture of organic compounds; in another the sulphur supply was varied by varying the proportion of cysteine; and in a third the phosphorus supply was varied by varying the proportion of sodium β-glycerophosphate.Mineralization of an element depended on the concentration of that element in the organic mixture. Mineralization of nitrogen did not occur until respiration had lowered the \arbon/nitrogen ratio to about 5 and mineralization of sulphur did not occur until respiration had lowered the carbon/sulphur ratio to about 50. On the other hand mineralization of phosphorus occurred before the carbon/phosphorus ratio had been reduced to any consistent figure. This may not be a characteristic of phosphorus mineralization but may have been caused by suboptimal supply of nitrogen.Mineralization of an element also depended on the concentration of other elements and, in general, reduced supplies of one element caused increased mineralization of others.

AB - The decomposition of a mixture of organic compounds was studied by measuring the evolution of carbon dioxide, and changes in the concentration of ammonium, sulphate, and phosphate. In one experiment the nitrogen supply was varied by varying the proportion of glycine in the mixture of organic compounds; in another the sulphur supply was varied by varying the proportion of cysteine; and in a third the phosphorus supply was varied by varying the proportion of sodium β-glycerophosphate.Mineralization of an element depended on the concentration of that element in the organic mixture. Mineralization of nitrogen did not occur until respiration had lowered the \arbon/nitrogen ratio to about 5 and mineralization of sulphur did not occur until respiration had lowered the carbon/sulphur ratio to about 50. On the other hand mineralization of phosphorus occurred before the carbon/phosphorus ratio had been reduced to any consistent figure. This may not be a characteristic of phosphorus mineralization but may have been caused by suboptimal supply of nitrogen.Mineralization of an element also depended on the concentration of other elements and, in general, reduced supplies of one element caused increased mineralization of others.

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