Rangeland Ecology & Management

Get reliable science

Interplanting crested wheatgrass with shrubs and alfalfa: effects of competition and preferential clipping
Author
Pendery, B. M.
Provenza, F. D.
Publisher
Society for Range Management
Publication Year
1987-11-01
Body

Planting palatable shrubs and legumes into an established stand of crested wheatgrass (Agropyron desertorum and A. cristatum) could increase forage yield and nutritional quality. Preferential grazing of the grass and legume in spring may enhance establishment of shrub seedlings. Seedlings of 3 species of shrubs (Artemisia tridentata ssp. vaseyana, Kochia prostrata, and Atriplex canescens) were transplanted into plots of crested wheatgrass using a replacement series design. Each species of shrub was grown with the grass, and with the grass and alfalfa (Medicago sativa cv. 'Ladak'); each of the 5 species was also grown in monoculture. Swards were either uncut or the grass and alfalfa were clipped while actively growing in late May and early June. Shrubs had greater current annual growth (CAG) (P is lesser than or equal to 0.001), higher relative yields (P is lesser than or equal to 0.05), lower mortality (P is lesser than or equal to 0.001), and more inflorescences (P≤0.001) in monoculture than in mixture. The grass had greater CAG in mixture than in monoculture (P is lesser than or equal to 0.05), and the grass and alfalfa had greater relative yield in mixture than in monoculture (P is lesser than or equal to 0.05). Clipping crested wheatgrass and alfalfa increased shrub CAG (P is lesser than or equal to 0.01), reduced mortality (P is lesser than or equal to 0.001), and increased the number of inflorescences (P is lesser than or equal to 0.01), but the increase in shrub CAG and flowering due to clipping was not as great as when shrubs were grown in monoculture. There were no interactions between competition and clipping (P>0.05). In terms of CAG, mortality, and flowering, A. tridentata grew better than K. prostrata, which grew better than A. canescens, but these relationships involved complex interactions. The contribution of shrubs to the biomass in mixture was minor; although alfalfa dominated three-way mixture yields, the grass also made a substantial contribution. Since competition was more important in determining shrub response than clipping and the 2 effects were independent, it is probably more important to reduce interspecific competition than to modify grazing practices when planting shrubs in a crested wheatgrass stand. 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

Language
en
Resource Type
Text
Document Type
Journal Issue/Article
Digital Object Identifier (DOI)
10.2307/3898871
Additional Information
Pendery, B. M., & Provenza, F. D. (1987). Interplanting crested wheatgrass with shrubs and alfalfa: effects of competition and preferential clipping. Journal of Range Management, 40(6), 514-520.
IISN
0022-409X
OAI Identifier
oai:repository.arizona.edu:10150/645201
Journal Volume
40
Journal Number
6
Journal Pages
514-520
Journal Name
Journal of Range Management
Keywords
transplanting
interplanting
planting
Bassia prostrata
Medicago sativa
Agropyron desertorum
Atriplex canescens
Agropyron cristatum
growth
cutting
Artemisia tridentata
crop yield
plant competition
rangelands
Utah