Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 November 1968
Published in Agron J 60:666-668 (1968)
© 1968 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Effect of Soil Temperature on the Reproductive Processes of Kentucky Bluegrass (Poa pratensis L. ‘Newport’)1

M. A. Maun, I. D. Teare and C. L. Canode2

Kentucky bluegrass plants grown in pots for 38 weeks under field conditions were subjected to soil temperatures of 14 ± 0.5 and 22 ± 2 C in a greenhouse environment. A soil temperature of 22 C significantly increased culm height, number of spikelets per head, percentage fertility of florets, and seed production. The 22 C soil temperature also resulted in a 5- to 8-day earlier maturity of panicles compared to the 14 C soil temperature. There was no significant difference in number of heads per plant between the two temperatures.

Key Words: culm height • maturity • fertility • heads per plant • spikelets per head • seed weightm per head

1 Cooperative investigation of the Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, and Washington Agricultural Experiment Stations. Scientific Paper No. 3097. College of Agriculture, Washington State University, Pullman, Washington 99163. Part of a thesis submitted by the senior author in partial fulfillment of the requirements for the Ph. D. degree. Supported in part by Hatch & State Project 1797.

2 Senior Lecturer, West Pakistan Agricultural University, Lyallpur, formerly Graduate Student, Washington State University; Assistant professor of Agronomy, Washington State University; Research Agronomist, Crops Research Division, Agricultural Research Service, USDA.

Received for publication April 19, 1968.




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Journal of Natural Resources
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Environmental Quality		 The Plant Genome
Copyright © 1968 by the American Society of Agronomy.