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

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Auda, H. Articles by Brown, R. H. Search for Related Content PubMed Articles by Auda, H. Articles by Brown, R. H. Agricola Articles by Auda, H. Articles by Brown, R. H.

Tillering and Carbohydrate Contents of Orchardgrass as Influenced by Environmental Factors¹

Three experiments were conducted in the greenhouse and environment chambers to study effects of nitrogen rates, light intensity, daylength, temperature, and defoliation, and their interrelationships on tillering, growth, and water-soluble carbohydrates in orchardgrass. Tillering, growth, and carbohydrates increased as light intensity was increased from 25% to normal sunlight. Tillering was associated with light energy rather than photoperiod. Extending the photoperiod with low light intensity reduced tillering, but not carbohydrates.

Tillering and growth was low at 50 to 60 F as compared with 70 to 80 F night-day temperatures; carbohydrates were much higher for the lower temperature, this was attributed to rapid carbohydrate utilization at the higher temperature.

Tillering and plant weights increased as defoliation was relaxed. Such improved tillering was attributed to more carbohydrates in stubble bases where new tillers formed. Root growth trends were similar to those for tillering.

Nitrogen stimulated tillering and growth, which lowered carbohydrates. Root weights decreased with added nitrogen.

The single order interactions of the factors mentioned above on tillering and carbohydrates were generally significant. High tillering appeared to be associated with factors that have potentially high photosynthesis and carbohydrate storage, but environmental factors must also favor rapid growth and utilization of carbohydrates in a dynamic biological system.

² Former graduate student (now Postdoctorate Fellow in Biochemistry, Oklahoma State University) and Professor and Assistant Professor of Agronomy, respectively.

Received for publication February 10, 1965.

This article has been cited by other articles:

				D. M. Burner and D. P. Belesky Diurnal Effects on Nutritive Value of Alley-Cropped Orchardgrass Herbage Crop Sci., September 1, 2004; 44(5): 1776 - 1780. [Abstract] [Full Text] [PDF]

				M. J. Fagerness, F. H. Yelverton, D. P. Livingston III, and T. W. Rufty Jr. Temperature and Trinexapac-Ethyl Effects on Bermudagrass Growth, Dormancy, and Freezing Tolerance Crop Sci., May 1, 2002; 42(3): 853 - 858. [Abstract] [Full Text] [PDF]

				J. W. Singer Species and Nitrogen Effect on Growth Rate, Tiller Density, and Botanical Composition in Grass Hay Production Crop Sci., January 1, 2002; 42(1): 208 - 214. [Abstract] [Full Text] [PDF]

				H.D. Karsten and J.W. MacAdam Effect of Drought on Growth, Carbohydrates, and Soil Water Use by Perennial Ryegrass, Tall Fescue, and White Clover Crop Sci., January 1, 2001; 41(1): 156 - 166. [Abstract] [Full Text] [PDF]