Browsing by Author "Steele, K.W."
Now showing items 1-5 of 6
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Anaerobic growth, nitrate reduction and denitrification in 46 rhizobium strains
(1982)A total of 46 rhizobial strains were assessed for anaerobic growth in the presence of nitrate, and, using the criteria of nitrate utilization and nitrous oxide and nitrogen production, for their ability to denitrify. Nitrite ... -
Denitrification by rhizobia: A possible factor contributing to nitrogen losses from soils
(The New Zealand Institute of Agricultural & Horticultural Science, 1980)The intensive pastoral farming system on which New Zealand animal production is based is almost completely dependent upon the rhizobium-legurne symbiosis for the fixed nitrogen required for pasture production. The average ... -
Effect of oxygen on the synthesis, activity and breakdown of the rhizobium denitrification system
(1983)The synthesis, activity and breakdown of the denitrifying enzymes of Rhizobium japonicum, R. lupini and R. meliloti were found to be regulated by O₂. Nitrogen oxide reductases were present in anaerobically grown and symbiotic ... -
Effect of rhizobial strain and host plant on nitrogen isotopic fractionation in legumes
(American Society of Plant Biologists, 1983)Lotus pedunculatus L., Medicago sativa L., Macroptilium atropurpureum, Glycine max, and Trifolium repens L. were grown in a N-free medium and inoculated with one of ten Rhizobium strains. Dry matter, N content, and tV5N ... -
Fractionation of nitrogen isotopes by animals: a further complication to the use of variations in the natural abundance of ¹⁵N for tracer studies
(Cambridge University Press, 1978)A study of the fractionation of nitrogen isotopes in the diet by cattle is described and the results discussed. Compared with the diet, urine had a lower ratio of ¹⁵N to ¹⁴N, but faeces, blood and milk all had a higher ...
