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Canopy and Chemistry of Pasture Weeds

Published online by Cambridge University Press:  12 June 2017

R. J. Carlisle ,
V. H. Watson  and
A. W. Cole
R. J. Carlisle
Affiliation:
Mississippi Agric. and For. Exp. Stn., Mississippi State, MS 39762
V. H. Watson
Affiliation:
Mississippi Agric. and For. Exp. Stn., Mississippi State, MS 39762
A. W. Cole
Affiliation:
Mississippi Agric. and For. Exp. Stn., Mississippi State, MS 39762
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Abstract

Morphological and chemical characteristics of 11 warm season pasture weed species were defined. Goldenrod (Solidago altissima L.) was significantly taller and common ragweed (Ambrosia artemisiifolia L.) had the largest canopy diameter of the 11 species studied. Species ranged from 14 to 134 cm in height with canopy diameters of 25 to 70 cm. No direct correlation was found between individual leaf size and total leaf area. Macro- and micromineral content varied widely among species but all values obtained were considered high enough to meet the requirements of ruminant animals. Redroot pigweed (Amaranthus retroflexus L.) and horsenettle (Solanum carolinense L.) contained potentially toxic levels of nitrate. Five of the 11 species contained sufficient crude protein for ruminants and six of the 11 species were more than 50% digestible. Digestible energy values averaged 1.9 Mcal/kg for the 11 weeds evaluated.

Keywords

Forage qualitymineral compositioncrude proteindigestible energycanopy diameter
Type
Research Article
Information
Weed Science , Volume 28 , Issue 2 , March 1980 , pp. 139 - 141
Copyright
Copyright © 1980 by the Weed Science Society of America 

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