Value of “Hobble Creek” Mountain Big Sagebrush as a Winter Forage for Mule Deer

Abstract

This study describes the development, naming, and release of a superior selection of big sagebrush (Artemisia tridentata) for use on mule deer (Odocoileus hemionus) winter ranges. Of the 186 big sagebrush selections tested, “Hobble Creek” was the most preferred by wintering mule deer. It was also preferred over an unknown selection of antelope bitterbrush (Purshia tridentata). The winter digestibility, crude protein, and phosphorus content of “Hobble Creek” forage ranks high compared with deciduous shrub species such as antelope bitterbrush, fourwing saltbush (Atriplex canescens), and true mountain-mahogany (Cercocarpus montanus). Also, “Hobble Creek” forage exceeds dormant grasses in winter digestibility, crude protein, and phosphorus content. “Hobble Creek” does not contain substances that lower grass cell wall digestion. “Hobble Creek” can be established and maintained on sites that have deep, well- drained soils with an annual precipitation of at least 35 cm (preferably more). Soil textures should not be any finer than a clay loam (40% clay or less). Soil pH may vary from 6.6 to 8.6. “Hobble Creek” can be established by direct seeding, by transplanting bareroot or containerized stock, and by a technique we term “mother plant.” Hobble Creek big sagebrush is a highly preferred winter forage that can raise the nutrient level of mule deer diets.