Ecophysiological Responses Of Chihuahuan Desert Grasses To Fire

B.W. Allred; K.A. Snyder

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Ecophysiological Responses Of Chihuahuan Desert Grasses To Fire

机译：奇瓦瓦沙漠草对火的生理生理响应

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To better understand the effects of fire in the Chihuahuan desert, gas exchange characteristics of two dominant grass species, Bouteloua eriopoda and Aristida purpurea, and soil nitrogen availability were studied in response to prescribed fire at the Jornada Experimental Range in southern New Mexico. Burned and unburned plant individuals were measured before and after fire. Rates of net photosynthesis and stomatal conductance were highest in burned individuals, with those of A. purpurea exceeding B. eriopoda. Soil nitrogen supply rates increased compared to unburned controls. Similar to other grasslands where fire is common, physiological characteristics of vegetation responded positively. These adaptations indicate that fire may be beneficial in the preservation and restoration of native grasses.

机译：为了更好地了解奇瓦瓦沙漠大火的影响，在新墨西哥州南部的Jornada试验场，研究了两种优势草种Bouteloua eriopoda和Aristida purpurea的气体交换特征，以及土壤氮的有效性，以应对规定的大火。在火灾之前和之后测量被燃烧和未燃烧的植物个体。被烧伤的个体的净光合作用和气孔导度最高，紫砂农杆菌超过B. eriopoda。与未燃烧的对照相比，土壤氮供应速率增加。与其他常见火灾的草原相似，植被的生理特征也做出了积极反应。这些变化表明，火可能有助于天然草的保存和恢复。

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来源
《Journal of arid environments》 |2008年第11期|p.1989-1996|共8页
作者
B.W. Allred; K.A. Snyder;
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作者单位

USDA-ARS Jornada Experimental Range, P.O. Box 30003, MSC 3JER, New Mexico State University, Las Cruces, NM 88003, USA;

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收录信息美国《科学引文索引》(SCI);
原文格式 PDF
正文语种 eng
中图分类环境科学、安全科学;
关键词
aristida purpurea; bouteloua eriopoda; nitrogen; photosynthesis;

机译：紫草;牛膝;氮;光合作用;

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5. Associative nitrogen fixation with C(4) grasses of the northern Chihuahuan Desert. [D] . El Shahaby, Ahmed F. 1988

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8. Assessment of Top Down and Bottom Up Controls on Fire Regimes and Vegetation Abundance and Distribution Patterns in the Chihuahuan Desert Borderlands: A Hierarchical Approach. Final Report to the Joint Fire Science Program, Project No. 03-3-3-13 [R] . Camp, A., Poulos, H. M., Gatewood, R., 2006

机译：对Chihuahuan沙漠边境地区火灾与植被丰度和分布格局的自上而下自下而上的控制评估：一种分层方法。联合消防科学计划的最终报告，项目编号03-3-3-13

Ecophysiological Responses Of Chihuahuan Desert Grasses To Fire

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