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《Journal of Northwest Forestry University》 2015-03
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Influence of Atmospheric Temperature on Effective Grown-up Seedling of Pinus tabulaeformis for Aerial Seeding in Hanzhong

TONG Kai-lin;WANG Suo-huai;HAN Chong-xuan;LI Jian-chun;Yangling Vocational & Technical College;Forestry Inventory and Planning Institute in Shaanxi;College of Foresty,Northwest A&F University;Shaanxi Work Station of Afforestation by Aerial Seeding;  
Air temperature is the main meteorological index,and also an important element of forestry climatic resources.The relationship between the annual and monthly variations of temperature and effective grown-up seedling after the aerial seeding is the prerequisite to scientific development plan of afforestation by aerial seeding and to rational evaluation of the application effect of RPA.Based on the study of the relationship between precipitation and effective grown-up seedling for Pinus tabulaeformis after the aerial seeding in Hanzhong,by using the data of the frequentness of sample plots with available seedling and the quantity of available seedling of P.tabulaeformis during grown-up seedling period in 1997 after aerial seeding,the correlation analysis method and the stepwise regression model analysis method were adopted to analyze the relationship between seedling effect and temperature.The influence of coordinating functionbetween temperature and precipitation on seedling effect was examined.The results showed that there was apositive correlation between the effective grown-up seedling and annual mean temperature and annual precipitation.The effective grown-up seedling not only depended on the annual mean temperature,but was also closely related to the monthly mean temperature.In fall and winter seasons,effective grown-up seedling was significantly negatively correlated with the mean temperature in January,had a positive correlation in other months,but negatively correlated with precipitation.In spring,there were significantly or highly significantly negative correlation between the effective grown-up seedling and mean temperature in March and May,and the highly significantly positive correlation with the mean temperature in April,but were highly significantly positive correlated to monthly precipitation.In summer,there were significantly or very significantly negative correlation with average temperature in June and July,were positively correlated with precipitation in August,and significant negative correlation with the precipitation in June,and significantly positive correlation with the precipitation in August and September.Among them,the effect of average temperature on effective grown-up seedling in April was the most powerful,and the precipitation in May contributed mostly on effective grown-up seedling in control area and the quantity of available seedling in RPA area.The contribution rate of the rainfall in July was higher to the frequentness of sample plots with available seedling in RPA area.Seed dressing with RPA could improve the utilization of water and thermal resources of P.tabulaeformis in the forest.
【Fund】: 国家林业公益性行业专项(201404405);; 国家林业局重点项目(2012-02)
【CateGory Index】: S791.254
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