极端低温分布模型在邓恩桉抗寒性标准定量化应用的研究

The Quantitative Application of Cold Resistance Standard in Eucalyptus dunnii with the Lowest Temperature Distribution Model

摘要:

依据闽北建阳市1971~2005年的极端低温资料构建极值分布数学模型, 用电导率指标确定邓恩桉(Eucalyptus dunnii)优株的半致死温度，预测0~5年、5~10年和10年以上可能出现的极端临界低温分别是-7.47℃、-7.47~-8.5℃和-8.68℃。首次提出利用极端低温分布模型结合电导率指标的方法定量划分林木的抗寒性, 称为“抗寒性极端低温分布法”, 该方法可广泛应用于不同区域、树种的抗寒适应性定量评价和林木个体的抗寒适应性筛选。

Abstract:

On the basis of the lowest temperature data from 1971 to 2005 in Jianyang of Fujian Province, the mathematical model of extreme values distribution was constructed, and the self-mortality temperature of Eucalyptus dunnii was determined by conductivity. The lowest temperatures were forecasted as -7.47℃, -7.47~-8.5℃ and 8.68℃ in 0~5 years, 5~10 years and over 10 years, respectively. The extreme low-temperature distribution method of cold resistance was put forward for the first time, which combined the extreme lowest-temperature distribution model with conductivity. The method could widely used in quantitative evaluation and individual selection of the cold resistance for different species and areas.