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Seasonal patterns of forage quality in six native forb species.
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- Author(s): Vera-Velez, Roy; Lamb, Eric G.
- Source:
Canadian Journal of Plant Science; Apr2022, Vol. 102 Issue 2, p316-323, 8p- Subject Terms:
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- Additional Information
- Subject Terms:
- Abstract: The forage value of native forbs is rarely considered in pasture mixtures, even though such species can make up a substantial proportion of the diet of cattle on native rangelands. Incorporating non-leguminous forbs into pasture grazing systems can provide additional ecosystem services such as pollination habitat, and ideally those forbs would also provide some forage value. We therefore assessed the seasonal variation in protein and fiber [neutral detergent fiber (NDF) and acid detergent fiber (ADF)] content of six common western Canadian native forb and sub-shrub species: yarrow (Achillea millefolium), smooth aster (Symphyotricum laeve), prairie crocus (Pulsatilla patens), prairie rose (Rosa arkansana), Canada goldenrod (Solidago canadensis), and American vetch (Vicia americana). The legume V. americana displayed the highest protein followed by S. canadensis and S. laeve. V. americana also has the highest fiber concentration through the growing season. S. canadensis and S. laeve had lower fiber content; thus, making them a good choice for addition in seed mixes to meet the energy and nutrient requirements of cattle. Forb protein and fiber content showed opposite trends during the growing season. Crude protein decreased while NDF and ADF increased as a general pattern tied to physiological stage and degree of senescence. The promising nutritional profile of some forb species suggests that these species should be considered in pasture mixes. [ABSTRACT FROM AUTHOR]
- Abstract: On tient rarement compte de la valeur fourragère des herbacées à feuilles large dans les mélanges à pâturage, même si ces espèces constituent une part importante du régime des bovins mis à l'herbe sur les grands parcours naturels. L'intégration d'autres herbacées à feuilles larges que des légumineuses aux systèmes de paissance présenterait des avantages supplémentaires pour l'écosystème, comme favoriser la pollinisation. Idéalement, ces herbacées auraient aussi une certaine utilité comme fourrage. Les auteurs ont évalué la variation saisonnière de la concentration de protéines et de fibres (au détergent neutre et au détergent acide) chez six herbacées à feuilles larges indigènes et espèces sous-arbustives courantes dans l'ouest Canadien, en l'occurrence l'achillée millefeuille (Achillea millefolium), l'aster lisse (Symphyotricum laeve), la pulsatille multifide (Pulsatilla patens), la rose sétigère (Rosa arkansana), la verge d'or (Solidago canadensis) et la vesce d'Amérique (Vicia americana). La vesce d'Amérique, une légumineuse, est la plante la plus riche en protéines, suivie par S. canadensis et S. laeve. La vesce d'Amérique a aussi la plus forte concentration de fibres durant la période végétative. S. canadensis et S. laeve étaient moins riches en fibres, ce qui en fait un bon choix pour les mélanges de semences devant respecter les besoins en énergie et en oligoéléments des bovins. Chez les herbacées à feuilles large, la concentration de protéines et celle de fibres suivent des tendances opposées durant la période végétative. La teneur en protéines brutes diminue, alors que celles de fibres au détergent neutre et au détergent acide augmentent généralement avec le stade physiologique et le degré de sénescence. Le profil nutritionnel prometteur de certaines herbacées à feuilles larges laisse croire qu'on pourrait envisager de les ajouter aux mélanges pour pâturage. [Traduit par la Rédaction] [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Canadian Journal of Plant Science is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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