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

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Related articles in Crop Science Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via ISI Web of Science (2) Citing Articles via Google Scholar Google Scholar Articles by Larsen, S. U. Articles by Bibby, B. M. Search for Related Content PubMed Articles by Larsen, S. U. Articles by Bibby, B. M. Agricola Articles by Larsen, S. U. Articles by Bibby, B. M. Related Collections Seed Establishment Turfgrass

Differences in Thermal Time Requirement for Germination of Three Turfgrass Species

^a Forest and Landscape-Denmark, Rolighedsvej 23, DK-1958 Frederiksberg C, Denmark
^b Dep. of Natural Sciences, The Royal Veterinary and Agricultural Univ., Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark

View larger version (34K): [in a new window]   Fig. 1. Observed and predicted thermal time germination curves for germination of two cultivars of red fescue, perennial ryegrass, and Kentucky bluegrass, respectively, at five constant temperatures. The predicted line is based on estimates from Eq. [3] which combines the thermal time model and the Weibull function. Note the different time scales on the x axes.

View larger version (30K): [in a new window]   Fig. 2. (A) Observed and predicted daily soil temperature at 1-cm depth in a Danish soil, depending on time of the year. The soil was located at Taastrup, Denmark, and soil temperature was recorded from 2 May to 3 Sept. 2001, from 20 Mar. to 10 Dec. 2002, and from 21 Mar. to 31 Dec. 2003. (B) Predicted time to 50% of final germination of red fescue, perennial ryegrass, and Kentucky bluegrass, respectively, depending on time of the year. The prediction is based on the estimated thermal requirements for germination of the three species, respectively, and the predicted daily soil temperature at 1-cm depth.