Study On Effect Of The Climatic Factors On The Increment Of Larix Leptolepis In Funiu Mountain In Western Henan

The research progress and problem on forestry and meterology were reviewed on the basis of broad reference both in home and abroad. In order to supply theoretical basis for the generalization and management of Larix leptolepis, the effects of meterological factors on the growth quantity of Larix leptolepis were studied by step-by-step regression and grey relation analysis based on the data of 15 analytical stem and meterological data of the lastest 20 years in LuanChuan. In this study, Larix leptolepis was used as the objectvie in mountainous area of west Henan province. The main results were as follows:The precipitation of last Summer and 10 cm groud temperature of Spring were the meterological factors that affected the diameter increment of Larix leptolepis severely analyzed by step-by-step regression. The increment of height Larix leptolepis was affected mainly by precipitation of last summer, and volume increment was affected mainly by the precipitation of last summer and 10 cm groud temperature of last spring. The order of the effect of the climatic factors on the increment of Larix leptolepis was The precipitation of last summer, 10 cm groud temperature of Spring, the relative humidity from September to October in last year, ≥10℃ accumulative air temperature ,10 cm groud temperature from September to October in last year, sunligh hours, relative moisruer of Februry, precipitation of November, the average temperature from April to May last year, the average temperature of last Winter.The increment of diameter and height of Larix leptolepis were most closly related to the relative humidity from September to October in last year analyzed by grey relation analysis. The order of the effect of the climatic factors on the increment of Larix leptolepis was the relative humidity from September to October in last year, precipitation of November, relative moistuer of Februry, The precipitation of last summer, sunligh hours, 10 cm groud temperature of Spring, ≥10℃ accumulative air temperature, the average temperature from April to May last year, the average temperature of last Winter, 10 cm groud temperature from September to October in last year.The effects of meterological factors on the growth quantity of Larix leptolepis were different analyzed by step-by-step regression and correlation coefficient analysis. But the basic results had inercommunity that both the precipitation of last summer and relative moistuer from September to October in last year, indicating that the increment of Larix leptolepis associated with precipitation and groud temperature of spring closely in the area.The innorate points is that climatic factors that affect the growth of Larix leptolepis in west -ern Henan province are systematically studied by step-by-step regression and grey relation analysis based on data from 15 analytical stem of Larix leptolepis and 10 climatic factors, and the theoretical basis for forest nursery and...