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Title: Growth and survival of northern plants at low soil temperatures : growth response, organic nutrients and ammonium utilization
Authors: University of Wisconsin--Madison. Dept. of Horticulture.
McCown, Brent H.
Keywords: Plants
Plant growth
Plant metabolism
Plant nutrition
Plant physiology
Soil temperature
Low temperatures
Cold regions
Cold weather conditions
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Special report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 186.
Description: Special Report
Abstract: Low soil temperatures have been implicated as one of the limiting factors for plant growth in northern regions and mav be responsible for the failure of some revegetation attempts in such areas. Because of the importance of maintaining an adequate plant cover over ice-rich arctic and subarctic soils, laboratory experiments were performed to further clarify the influence of soil temperature on plant growth. At two soil temperatures (5° arid 15°C) and with three levels of soil ammonium, data were obtained that showed that low soil temperatures can be extremelv inhibitory for the growth of introduced graminoid revegetation species. In contrast to the adapted native arctic grasses, introduced species were not able to utilize increased soil nutrient levels at 5°C. No significant influence of soil temperature on the organic nutrient content of the plants was observed. High levels of organic nutrients were found in both adapted and unadapted species, indicating that this factor may not be a specific adaptation to northern regions. It is suggested that species intended for revegetation purposes in northern regions be screened for tolerance to low soil temperature utilizing such relatively rapid laboratory techniques.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Special Report

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