Temperature influences on the in vitro digestibility and soluble carbohydrate accumulation of tropical and temperate grasses

Wilson, J.R. and Ford, C.W. (1973) Temperature influences on the in vitro digestibility and soluble carbohydrate accumulation of tropical and temperate grasses. Australian Journal of Agricultural Research, 24 (2). pp. 187-198.

[img] PDF - Published Version
Restricted to ICRISAT researchers only

Abstract

Thirteen tropical or subtropical and 11 temperate grasses were grown in controlled environments at day/night temperatures of 21/13, 27/19 and 32/34 deg C. Each plant was harvested 2 days after the 5th leaf on the main stem reached maximum length; other plants of Panicum maximum var. trichoglume and Lolium perenne cv. S24 grown under the same conditions were also harvested 4, 8, 12 and 18 days after this stage of development. There was a consistent decline in the digestibility in vitro of most of the temperate grasses with increase in temperature from 21/13 to 32/24 deg . This decline averaged about 5 digestibility units and was associated with a fall in the content of soluble carbohydrates. In contrast, temperature had little effect on the digestibility of most of the tropical grasses. However, in later harvests of P. maximum digestibility was consistently lower at 27/19 and 32/24 deg than at 21/13 deg . This was attributed to the more advanced growth stages at the higher temperatures. The temperate grasses accumulated much higher concentrations of soluble carbohydrate than the tropical grasses

Item Type: Article
Author Affiliation: Division of Tropical Pastures, CSIRO, Cunningham Laboratory, St. Lucia, Queensland
Subjects: Atmosperic Science > Climatology
Plant Protection
Divisions: Other Crops
Depositing User: Mr B Krishnamurthy
Date Deposited: 20 Mar 2012 14:03
Last Modified: 20 Mar 2012 14:03
Official URL: http://dx.doi.org/10.1071/AR9730187
URI: http://eprints.icrisat.ac.in/id/eprint/4003

Actions (login required)

View Item View Item