Publication Date

1997

Location

Manitoba and Saskatchewan

Description

This study reports on the nutrient content and digestibility of five cool-season grasses common in the Mixed-Prairie Ecoregion of Saskatchewan, Canada: (1) green needlegrass (Stipa viridula Trin.); (2) needle-and-thread (Stipa comata Trin & Rupr.); (3) western porcupinegrass (Stipa curtiseta (Hitchc.) Backworth); (4) northern wheatgrass (Agropyron dasystachyum (Hook.) Scribn.); and (5) western wheatgrass (Agropyron smithii Rydb.). Plant material was collected monthly and analyzed for invitro organic matter digestibility ( IVOMD), crude protein (CP), P, Ca, ADF and NDF. All species showed similar intra-seasonal pattern in the various parameters studied and no species x month interactions were found. Differences among species in digestibility and nutrient content were found mainly during the growing season (May-Sept.). In particular, western wheatgrass showed higher IVOMD, CP and P and lower ADF and NDF during that period than the other species. The data suggest the need for supplemental protein and P when grazed during the fall, winter and early spring.

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Nutrient Content of Saskatchewan Native Range Plants

Manitoba and Saskatchewan

This study reports on the nutrient content and digestibility of five cool-season grasses common in the Mixed-Prairie Ecoregion of Saskatchewan, Canada: (1) green needlegrass (Stipa viridula Trin.); (2) needle-and-thread (Stipa comata Trin & Rupr.); (3) western porcupinegrass (Stipa curtiseta (Hitchc.) Backworth); (4) northern wheatgrass (Agropyron dasystachyum (Hook.) Scribn.); and (5) western wheatgrass (Agropyron smithii Rydb.). Plant material was collected monthly and analyzed for invitro organic matter digestibility ( IVOMD), crude protein (CP), P, Ca, ADF and NDF. All species showed similar intra-seasonal pattern in the various parameters studied and no species x month interactions were found. Differences among species in digestibility and nutrient content were found mainly during the growing season (May-Sept.). In particular, western wheatgrass showed higher IVOMD, CP and P and lower ADF and NDF during that period than the other species. The data suggest the need for supplemental protein and P when grazed during the fall, winter and early spring.