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《Acta Agriculturae Boreali-Occidentalis Sinica》 2008-03
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Comparison of the Growth Characteristics for the Introduced Pinus sylvestris var. under Different Site Conditions in Yulin Desert Area

LUO Ling and LIAO Chao-ying(College of Resource and Environment of Northwest A & F University,Yangling Shaanxi 712100,China)  
The growth process of the introduced Pinus sylvestris var.was model fitted by logistic equation.To make the fitting more exactly,solver in excel was introduced.On the basis of the fitting model,the growth process of Pinus sylvestris var.was divided into three periods.The research on Pinus sylvestris var.'s growth characteristics under different site conditions showed that the plant on the lower land between dunes and the plant on the flat sandy land are the first to begin fast-growing-period,and the one on the upper part of the dune is the last,while and their durations of fast-growing is in the same order.To the ones which are growing on the lower part of the dune and on the middle part of the dune,the time they begin their fast-growing and the duration of this growing process are among the site conditions which were mentioned before.The order from the worst to the best for the growth status of the plants on different site conditions is:the lower land among the dunes,the flat sandy land,the lower part of the dune,the middle part of the dune and the upper part of the dune.
【Fund】: 国家自然科学基金项目(40171061)
【CateGory Index】: S791.253
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