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Gardner saltbush [Atriplex gurdneri (Moq.) D. Dietr.] seeds collected from the Red Desert Basin of Wyoming were subjected to pretreatments of scarification (Se), washing (W), and stratification (St) to alleviate dormancy. Laboratory germination was evaluated. Subsequently, seedling vigor was observed by determining field emergence of similarly pretreated seeds spring planted at 1 irrigated and 2 dryland sites in Wyoming. Effects of l-cm and 3-cm planting depths on emergence were also evaluated. Seed was pretreated, then dehydrated with minimal impact on seed germination. Field emergence was much less than laboratory germination for all treatments at all sites, indicating that establishment for this species is related to poor seedling vigor as much as to seed dormancy. Moreover, when compared to untreated controls, relative responses to seed pretreatments often differed between laboratory and field trials. In the laboratory SC = W = St provided the greatest germination, whereas the best seed pretreatment for field establishment was SC + St. Washing had little effect on enhancing field emergence and appeared to inhibit effects of St in scarified seed. The most effective planting depth varied with climatic/edaphic severity of the site. Gardner saltbush (Atriplex gardneri (Moq.) D. Dietr.) is a low growing half-shrub (20-50 cm high) which occurs in cold desert Authors are graduate assistant and assistant professor, Plant Science Division, University of Wyoming, Laramie 82071. Senior author is currently located at Texas Agricultural Experiment Station,, Vernon 76384. This article is Wyoming Agncultrual Experiment Station Journal Article No.

Seed Pretreatments and Their Effects on Field Establishment of Spring-Seeded Gardner Saltbush