Adaptability Analysis of Introduction and Cultivation of 4 Evergreen Broad-leaved Tree Species in Northern Jiangsu Province

Through the observation of the morphological characteristics of 4 evergreen broad-leaved tree species introduced and cultivated in northern Jiangsu during the wintering period, a number of physiological and biochemical indicators related to cold tolerance of plants were determined. Combining Logistic equation analysis and membership function analysis, the adaptability of 4 evergreen broad-leaved tree species in the introduction and cultivation environment was analyzed and evaluated at various levels. Results show that 4 evergreen broad-leaved tree species, including Cinnamomum pedunculatum, Michelia compressa, Michelia chapensis and Elaeocarpus sylvestris, can tolerate the average low temperature of −10− −7 ℃ in winter in Jiangsu northern areas. According to the comprehensive comparison of cold tolerance of 4 species, the order from strong to weak is as the following: Cinnamomum pedunculatum (Luanchuan), Cinnamomum pedunculatum (Nanjing), Michelia compressa, Michelia chapensis, Elaeocarpus sylvestris, Cinnamomum pedunculatum (Chengdu). Comprehensive evaluation shows that 4 evergreen broad-leaved tree species are suitable for introduction and cultivation in Jiangsu northern areas.