caa a22 4500 386326975 CHVBK 20180307111656.0 cr unu---uuuuu 161130e198910 xx s 000 0 eng 10.1017/S001447970001509X doi S001447970001509X pii (NATIONALLICENCE)cambridge-10.1017/S001447970001509X Date R. A. CSIRO, Division of Tropical Crops and Pastures, 306 Carmody Road, St Lucia, Queensland 4067, Australia Growth, Nodulation and Nitrogen Fixation in Stylosanthes: Effect of Different Day/Night Root Temperatures [Elektronische Daten] [R. A. Date] Nodulated plants of six varieties of Stylosanthes were grown at a constant temperature of 30°C for 21 days in a controlled environment and then for a further 21 days at a range of day/night root temperatures. Dry matter and nitrogen content of S. hamata cv. Verano and CPI40264A were measured after growth at day/night root temperatures of 30/30, 40/30, 50/30, 60/30 and 60/35°C. Similarly, growth and nitrogen content were measured for Verano, CPI40264A, S. gvianensis cv. Oxley and cv. Cook, S. humilis cv. Lawson and S. scabra cv. Seca after growth at root temperatures of 25/20, 25/25, 30/25, 30/30, 35/30 and 40/30°C. There were strong interactions of root temperature with variety and harvest time (31 and 42 days) but all varieties grew well even at the highest temperatures (50-60°C) provided they were supplied with nitrogen. Symbiotically dependent plants of S. hamata cv. Verano were more tolerant of high root temperatures and maintained better growth and nitrogen fixation at 40/30°C than those of CPI40264A, especially after the 31 day harvest. All six varieties responded similarly, but to differing extents, to the lower range of root temperatures. Nitrogen fixation was more severely affected than dry weight by high root temperature. Copyright © Cambridge University Press 1989 Experimental Agriculture Cambridge University Press 25/4(1989-10), 461-472 0014-4797 25:4<461 1989 25 EAG https://doi.org/10.1017/S001447970001509X text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S001447970001509X text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Date R. A. CSIRO, Division of Tropical Crops and Pastures, 306 Carmody Road, St Lucia, Queensland 4067, Australia NATIONALLICENCE 773 0- Experimental Agriculture Cambridge University Press 25/4(1989-10), 461-472 0014-4797 25:4<461 1989 25 EAG CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence SWISSBIB 386326975 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge