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Factors Impacting the Health of Roadside Vegetation.
| 题名： | Factors Impacting the Health of Roadside Vegetation. |
| 作者： | trahan, n. a. peterson, c. m. |
| 关键词： | chlorides, foliar injury, leaf-level gas exchange, plant nutrition, seed germination, photosynthesis, trees, diseases, highway maintenance, colorado, air pollution, drought, metals, salts effects, revegetation, ice, deicers, snow removal, soil treatment, |
| 摘要： | Roadside vegetation is exposed to a variety of biotic and abiotic stresses that can impact plant health. Drought, pollution, disease, insects, lack of nutrients, and roadbed management practices may potentially act alone or synergistically to adversely affect plants in proximity to the roadside. To date, little published research documents the impacts of certain deicers on vegetation in relationship to other potential stresses. This study provides an ecological impact assessment of factors affecting the health of roadside vegetation in the state of Colorado including potential biotic and abiotic plant stressors and deicer applications. Five main objectives were investigated: (1) Determination of the extent and mode of Colorado roadside vegetation exposure to deicers and the relationship to tree health; (2) Evaluation of photosynthesis and leaf level gas exchange in Colorado roadside conifers prior to and over a deicing season; (3) Laboratory investigation and comparison of the effects of various sand/salt mixtures and liquid deicers on plant health, photosynthesis, and seed germination; (4) Assessment of leaf water status in conifer trees within designated plots accounting for the presence of drought stress prior to and throughout the deicing season; and (5) Direct and indirect assessment of other factors potentially deleterious to roadside vegetation including: pollution, nutrient availability, disease, and insect impacts in areas where deicer stress may be a concern. / NOTE: Final rept. / Supplementary Notes: Sponsored by Federal Highway Administration, Denver, CO. Colorado Div. and Colorado Dept. of Transportation, Denver. Research Branch. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| 总页数： | u0716；264p |
| 报告类型： | 科技报告 |
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