caa a22 4500 386327017 CHVBK 20180307111656.0 cr unu---uuuuu 161130e198910 xx s 000 0 eng 10.1017/S0014479700015088 doi S0014479700015088 pii (NATIONALLICENCE)cambridge-10.1017/S0014479700015088 Growth, Nodulation and Nitrogen Fixation in Stylosanthes: Effect of Different Root Temperatures at two Shoot Temperatures [Elektronische Daten] Nodulated plants of Stylosanthes hamata, S. guianensis, S. humilis, S. scabra and S. fruticosa were grown in controlled environments with varied root and shoot temperatures. Measurement of dry matter and nitrogen content suggested that shoot temperature may be more important than root temperature in controlling growth and nitrogen fixation. There were strong interactions with variety. A fall in relative growth rate with increase in shoot temperature was least for S. guianensis and greatest for S. hamata and S. scabra. The optimum root temperature for growth and nitrogen fixation was approximately 30°C. Ninety percent maximum yield was achieved between root temperatures of 15-36°C for growth and 23-34°C for nitrogen fixation but varied with variety. Nitrogen fixation was more sensitive than dry weight to root temperature. The pattern of response of percentage nitrogen and nitrogen fixation efficiency reflected those for dry weight and nitrogen yields. Shoot to root ratios decreased toward the optimum root temperature then increased at the highest temperature. The reaction of varieties to root and shoot temperatures may be an important factor in determining their suitability for new regions. Copyright © Cambridge University Press 1989 Date R. A. Division of Tropical Crops and Pastures, CSIRO, 306 Carmody Road, St Lucia, Queensland 4067, Australia Ratcliff D. Division of Mathematics and Statistics, CSIRO, 306 Carmody Road, St Lucia, Queensland 4067, Australia Experimental Agriculture Cambridge University Press 25/4(1989-10), 447-460 0014-4797 25:4<447 1989 25 EAG https://doi.org/10.1017/S0014479700015088 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0014479700015088 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Date R. A. Division of Tropical Crops and Pastures, CSIRO, 306 Carmody Road, St Lucia, Queensland 4067, Australia NATIONALLICENCE 700 1- Ratcliff D. Division of Mathematics and Statistics, CSIRO, 306 Carmody Road, St Lucia, Queensland 4067, Australia NATIONALLICENCE 773 0- Experimental Agriculture Cambridge University Press 25/4(1989-10), 447-460 0014-4797 25:4<447 1989 25 EAG CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence SWISSBIB 386326975 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge