Herbaceous Production and Soil Nitrogen after Mesquite Mortality in Southern Great Plains (US) Grassland
نویسندگان
چکیده
In the mixed C3/C4 grassland of southern Great Plains, United States, invasive woody legume, honey mesquite (Prosopis glandulosa), affects grass production and composition differently beneath canopy (subcanopy) than in spaces between trees (intercanopy) due part to dominant presence C3 Texas wintergrass (Nassella leucotricha) soil enrichment from N-fixation by mesquite. This arrangement, unlike most Prosopis systems worldwide that have C4 or subshrub understories, uniquely spatially seasonally during expansion possibly after anthropogenic removal We compared herbaceous N responses subcanopy intercanopy microsites first 2 yr following a root-killing herbicide treatment. Perennial (PGR) total (THB) were greater treated untreated at 1-yr post treatment, with comprising largest portion PGR. 2, PGR declined both no differences treatments. However, THB remained mainly increased annual forb supplanted 1. Increased was likely high rainfall fall 1 stimulated seed germination, light loss shading mesquite, inorganic 2. Pretreatment spatial heterogeneity N, caused affected post-treatment patterns production. The unexpected replacement forbs revealed forage brush control can deviate markedly predicted models under certain conditions.
منابع مشابه
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ژورنال
عنوان ژورنال: Rangeland Ecology & Management
سال: 2021
ISSN: ['1551-5028', '1550-7424']
DOI: https://doi.org/10.1016/j.rama.2021.04.002