Growth and uptake of nitrogen by wheat and ryegrass in fumigated and irradiated soil

A - Papers appearing in refereed journals

Jenkinson, D. S., Nowakowski, T. Z. and Mitchell, J. D. D. 1972. Growth and uptake of nitrogen by wheat and ryegrass in fumigated and irradiated soil. Plant and Soil. 36 (1-3), pp. 149-158. https://doi.org/10.1007/BF01373465

AuthorsJenkinson, D. S., Nowakowski, T. Z. and Mitchell, J. D. D.
Abstract

Wheat and ryegrass were grown in pots containing soil that had either been irradiated, fumigated with methyl bromide, fumigated with formaldehyde, or left untreated. All pots received a basal dressing of potassium, phosphorus and magnesium; response to nitrogen was tested by applying either 0, 0.177 or 0.354 g nitrogen per pot. Irradiation increased the growth of wheat and ryegrass; uptake of nitrogen was also increased in both crops. The amount of fertilizer nitrogen equivalent to the nitrogen supplied by seeds and soil (the “N value”) can be calculated from the efficiency of uptake of fertilizer nitrogen and used to allow for the effect on crop growth of the nitrogen released by irradiated soil. With wheat the increase in growth can be attributed solely to the extra mineral nitrogen released by irradiated soil. However, ryegrass grew a little better than would have been expected if the only effect of irradiation was to increase the release of soil nitrogen.

Fumigation with methyl bromide or formaldehyde increased the growth of wheat and ryegrass not given fertilizer nitrogen. However, fumigation with methyl bromide left ionic bromide in the soil, and this depressed the growth of wheat receiving fertilizer nitrogen. Formaldehyde also left residues; these influenced soil metabolism and sometimes depressed the growth of plants given fertilizer nitrogen.

Year of Publication1972
JournalPlant and Soil
Journal citation36 (1-3), pp. 149-158
Digital Object Identifier (DOI)https://doi.org/10.1007/BF01373465
Open accessPublished as non-open access
Output statusPublished
Publication dates
Print01 Feb 1972
Copyright licensePublisher copyright
PublisherSpringer
ISSN0032-079X

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