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根据影响日本落叶松生长的主要因子 ,用灰色关联分析、数量化 -灰色关联分析以及多项式回归等方法 ,对河南省日本落叶松适生区域进行了研究 .结果表明 :河南省适宜日本落叶松生长的海拔范围为 770～ 2 32 0m .其中 ,最适生区海拔为 [1 0 30 ,1 6 5 0 ]m ;适生区海拔为 (1 6 5 0 ,2 32 0 ]m ;次适生区海拔为 [770 ,1 0 30 )m .影响日本落叶松生长的立地因子大小依次为 :海拔、坡向、土层厚度、土壤种类和坡位 ;气象因子大小依次为 :降水量、相对湿度、日照时数、7月份平均气温、无霜期、蒸发量、年均气温、≥ 1 0℃积温、1月份气温
According to the main factors affecting the growth of Larix kaempferi in Japan, the suitable area for Larix kaempferi in Henan Province was studied by means of gray relational analysis, quantitative-gray relational analysis and polynomial regression, etc. The results showed that: The altitude range of the most suitable area is [10 30, 16 5 0] m; the elevation of suitable area is (1650, 2220) m; The altitude of the site was [770, 130 30 m.) The site factors affecting the growth of Japanese larch were as follows: elevation, aspect, thickness of soil layer, soil type and slope position. The meteorological factors were as follows: precipitation, relative humidity , Sunshine duration, average temperature in July, frost-free period, evaporation, annual average temperature, ≥ 10 ℃ accumulated temperature, January temperature