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Effects of Root Temperature on the Growth and Nitrogen Fixation of Trifolium semipilosum and Trifolium repens

Published online by Cambridge University Press:  03 October 2008

R. A. Date
Affiliation:
CSIRO, Division of Tropical Crops and Pastures, 306 Carmody Road, St Lucia, Qld 4067Australia
R. J. Roughley
Affiliation:
NSW Department of Agriculture, Horticultural Research Station, PO Box 720, Gosford, NSW 2250, Australia

Summary

Changes in plant dry weight and nitrogen content of Trifolium semipilosum cv. Safari and T. repens cv. Grasslands Huia were monitored when the root systems of effectively nodulated 28-day-old plants were exposed to a range of constant and diurnal temperatures for 21 days. Nitrogen fixation was more sensitive to high root temperatures than was dry weight accumulation, and T. semipilosum was relatively more tolerant of high root temperatures than T. repens for both dry weight and nitrogen content. The optimum temperatures for dry weight yield and nitrogen fixation (≡nitrogen content) were similar (21–23°C) for both species.

Our data suggest that growth and nitrogen fixation in T. semipilosum are more tolerant of short-term exposure to increase in root temperature than in T. repens. In addition, both species accumulated more dry matter and fixed more nitrogen when night temperatures were reduced from either 30 or 35°C to 25°C. The increase was greater with T. semipilosum and may be a major factor in its adaptation to the humid subtropics and cooler (elevated) tropics.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1986

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References

REFERENCES

Date, R. A. (1971). Nodulation of Trifolium semipilosum. CSIRO, Division of Tropical Pastures Annual Report 1970–71, pp. 4850.Google Scholar
Gibson, A. H. (1961). Root temperature and symbiotic nitrogen fixation. Nature 191:10801081.Google Scholar
Gibson, A. H. (1963). Physical environment and symbiotic nitrogen. I. The effect of root temperature on recently nodulated Trifolium subterraneum L. plants. Australian Journal of Biological Science 16:2842.Google Scholar
Gibson, A. H. (1965). Physical environment and symbiotic nitrogen fixation. II. Root temperature effects on the relative nitrogen assimilation rate. Australian Journal of Biological Science 18:295310.CrossRefGoogle Scholar
Gibson, A. H. (1967). Physical environment and symbiotic nitrogen fixation. V. Effect of time of exposure to unfavourable root temperatures. Australian Journal of Biological Science 20:11051117.CrossRefGoogle Scholar
Gillett, J. B. (1952). The genus Trifolium in southern Arabia and Africa south of the Sahara. Kew Bulletin 3:367404.CrossRefGoogle Scholar
Jones, R. M. & Date, R. A. (1975). Studies on the nodulation of Kenya white clover (Trifolium semipilosum) under field conditions in south-east Queensland. Australian Journal of Experimental Agriculture and Animal Husbandry 15:519526.Google Scholar
Jones, R. J. & Jones, R. M. (1975). Animal and pasture production from Kenya white clover and white clover based pastures. CSIRO, Division of Tropical Agronomy Annual Report 1974/75, pp. 67.Google Scholar
Jones, R. J. & Jones, R. M. (1982). Observations on the persistence and potential for beef production of pastures based on Trifolium semipilosum and Leucaena leucocephala in subtropical coastal Queensland. Tropical Grasslands 16:2429.Google Scholar
Mannetje, L. 't (1975). Effect of day length and temperature on introduced legume and grasses for the tropics and sub-tropics of coastal Australia. 2. N-concentration, estimated digestibility and leafiness. Australian Journal of Experimental Agriculture and Animal Husbandry 15:256263.Google Scholar
Mannetje, L. 't & Pritchard, A. J. (1974). Effect of day length and temperature on introduced legumes and grasses for the tropics and sub-tropics of Coastal Australia. 1. Dry matter production, tillering and leaf area. Australian Journal of Experimental Agriculture and Animal Husbandry 14:173181.Google Scholar
Mwakha, E. (1969). Observations on the effect of temperature on growth of Trifolium semipilosum Fres. East African Agricultural and Forestry Journal 34:289292.Google Scholar
Roughley, R. J. & Date, R. A. (1986). The effect of strain of Rhizobium and of temperature on nodulation and early growth of Trifolium semipilosum cv. Safari. Experimental Agriculture 22:123131.CrossRefGoogle Scholar
Shaw, K. A. & Quinlan, T. J. (1978). Dry matter production and chemical composition of Kenya White Clover and some tropical legumes grown with Pennisetum clandestinum in cut swards on the Evelyn Tableland of North Queensland. Tropical Grasslands 12:4957.Google Scholar
Small, J. G. C. & Joffe, A. (1968). Physiological studies on the genus Trifolium with special reference to the South African species. II. Influence of root temperature on growth, nodulation and symbiotic nitrogen fixation. South African Journal of Agricultural Science 11:4156.Google Scholar
Wilson, J. R. (1972). Comparative nodulation, nitrogen fixation, and growth of Glycine wightii cv. Cooper and Phaseolus atropurpureum cv. Siratro seedlings. Australian Journal of Agricultural Research 23:18.Google Scholar