Teskey R O, Bongarten B C, Cregg B M, Dougherty P M, Hennessey T C
School of Forest Resources, University of Georgia, Athens, GA 30602, USA.
Tree Physiol. 1987 Mar;3(1):41-61. doi: 10.1093/treephys/3.1.41.
Water stress and temperature impose fundamental limits to forest productivity. Stresses caused by fluctuating or extreme temperatures or limited water availability vary both seasonally and from year to year. The role of these stresses should be considered when investigating the causes of declines in forest productivity. Forest growth, or carbon gain, can be related quantitatively to three components: leaf area, rate of net photosynthesis and rate of respiration. This paper examines effects of temperature and water supply on these components with particular reference to loblolly pine (Pinus taeda L.), a species of economic importance in the southeastern United States where declines, of unknown cause, in forest productivity have been reported.
水分胁迫和温度对森林生产力构成了基本限制。由温度波动或极端温度或水资源可用性有限所引起的胁迫，在季节和年份上都有所不同。在调查森林生产力下降的原因时，应考虑这些胁迫的作用。森林生长，即碳获取，可以在数量上与三个组成部分相关：叶面积、净光合速率和呼吸速率。本文特别参照火炬松（Pinus taeda L.），研究温度和水分供应对这些组成部分的影响，火炬松是美国东南部一种具有经济重要性的树种，在该地区已报道了森林生产力出现不明原因的下降。
