HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (1) Citing Articles via Google Scholar Google Scholar Articles by Butler, T. J. Articles by Ringer, L. J. Search for Related Content PubMed Articles by Butler, T. J. Articles by Ringer, L. J. Agricola Articles by Butler, T. J. Articles by Ringer, L. J. Related Collections Forage Management Crop Growth and Development Crop Ecology

FORAGE & GRAZING LANDS

Rate of Leaf Appearance in Crimson Clover

^a Texas A&M University Agricultural Research and Extension Center, 1229 N. Hwy 281, Stephenville, TX 76401
^b Texas A&M University Agricultural Research and Extension Center, P.O. Box 200, Overton, TX 75684-0200
^c Dep. of Statistics, Texas A&M University, College Station, TX 77843

* Corresponding author (t-butler{at}tamu.edu)

Understanding factors that affect growth and development of crimson clover (Trifolium incarnatum L.) are important for the development of management practices to optimize forage utilization. In a 3-yr field experiment at College Station, TX, we evaluated the effects of planting date on rate of leaf appearance of an intermediate- and late-maturing crimson clover. We wanted to determine if growing degree days (GDD) or a photothermal index (PTI) could be used to predict growth. Leaf appearance rates (LAR) did not differ between ‘Tibbee’ and ‘Columbus’ crimson clover. Leaf appearance rate was primarily controlled by temperature or GDD, which accounted for 90 to 99% of the variability within each planting date. Photoperiod did not consistently influence the rate of leaf appearance under normal daylengths of 10 h 12 min to 14 h 6 min used in this study. Predictions of LAR were not improved when photoperiod was combined with temperature in a photothermal index than with predictions that used GDD alone. Leaf appearance rate of crimson clover was generally higher when planted in October, November, and December and lower when planted in September, February, and March.

Abbreviations: DL, daylength • LAR, leaf appearance rate • GDD, growing degree days • LN, leaf number • PLS, pure live seed • PTI, photothermal index

This article has been cited by other articles:

				S. J. Cookson, K. Chenu, and C. Granier Day Length Affects the Dynamics of Leaf Expansion and Cellular Development in Arabidopsis thaliana Partially through Floral Transition Timing Ann. Bot., April 1, 2007; 99(4): 703 - 711. [Abstract] [Full Text] [PDF]

				J. P. Muir, W. R. Ocumpaugh, and T. J. Butler Trade-Offs in Forage and Seed Parameters of Annual Medicago and Trifolium Species in North-Central Texas as Affected by Harvest Intensity Agron. J., January 1, 2005; 97(1): 118 - 124. [Abstract] [Full Text] [PDF]