Webb Warren L, Newton Michael, Starr Duane
School of Forestry, Oregon State University, 97331, Corvallis, Oregon.
Oecologia. 1974 Dec;17(4):281-291. doi: 10.1007/BF00345747.
The CO exchange response of plants to multiple environmental variables is often difficult to frame for purposes of comparison. In this paper, a nonlinear model relating CO exchange to light and temperature is derived from experimental curves determined in other investigations. Parameter values, determined from a least-squares fit of the model to CO exchange data, are useful for comparing responses to light and temperature in terms of seasonal phenology, population heterogeneity, or species variation.The model was fitted to CO exchange data of a group of 40 Alnus rubra Bong. (red alder) seedlings for steady-state combinations of light and temperature. The average deviation of the data from the model was ±6.7%. This steady-state expression satisfactorily predicted CO exchange for dynamic conditions of light and temperature occurring in a diurnal cycle.
为了便于比较，植物对多种环境变量的CO交换响应往往难以界定。在本文中，一个将CO交换与光照和温度相关联的非线性模型是从其他研究中测定的实验曲线推导出来的。通过将该模型与CO交换数据进行最小二乘拟合所确定的参数值，对于从季节性物候、种群异质性或物种差异方面比较对光照和温度的响应很有用。该模型针对一组40株红桤木（Alnus rubra Bong.）幼苗在光照和温度的稳态组合下的CO交换数据进行了拟合。数据与模型的平均偏差为±6.7%。这种稳态表达式令人满意地预测了昼夜循环中光照和温度动态条件下的CO交换情况。
