Aboveground biomass of four range species was collected at several phenological stages and total nitrogen was determined. The dissolvable nitrogen fraction within these samples was estimated utilizing four techniques: (1) in vivo nylon bag digestion in a rumen-fistulated Bison bison; (2) in vitro Tilley and Terry plus pepsin; (3) neutral detergent fiber; and (4) laboratory detergent fiber. Total nitrogen concentration in all plant species studied was highest during early growth and decreased with advancing maturity. A similar amount of nitrogen was removed from dead or dormant plant materials using any technique, but significantly more nitrogen was removed from green succulent material utilizing the nylon bag technique than was removed with the three laboratory assays. The amount of nitrogen removed from plant foliage was highly correlated among techniques. Equations were developed to predict nitrogen losses with the nylon bag technique using dissolved nitrogen values obtained from any of the other three techniques. This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries. The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from OJS platform August 2020
Scholarly peer-reviewed articles published by the Society for Range Management. Access articles on a rolling-window basis from vol. 1, 1948 up to 5 years from the current year. Formerly Journal of Range Management (JRM). More recent content is available by subscription from SRM.