| As all known, Jiangsu is one of the largest provinces for poplar plantation and wood production . Although the analysis and evaluation of poplar growth with yield has made some development , systematical research related poplar mensuration has not been completed , especially in poplar yield models and estimation . With the principal theory and method of forest mensuration in recent years , this paper deals with the poplar stand characteristics and yield estimation in Jiangsu by using poplar growth and yield models .The poplar stand dynamic characteristics mainly includes the growth of tree diameter , tree height , tree volume and merchantable volume . Basted on the poplar site index table established in this paper , the stand dynamics of diameter , height and volume have been analyzed . As a result , the yield of poplar stand such as stand volume and merchantable volume has also been estimated in different site . The main research content and summary are as follows:1 . The site index curve established in the paper has really described the processes of poplar growth . The stand height ( H ) tends to the stable value while the stand age is not younger . Meantime the height growth of young stand shows much faster in high site condition , but decreased faster in old age . On the opposition , the heigh of young stand grows slowly in lower site condition , and also decreased slowly in old age , which keep a tally with that poplar height grows fast in earlier period . The results by tested also shows that Richards model with 4 parameters fitted poplar site has been considered feasible .The Richards model with 4 parameters is :Where H = mean height of dominating trees , SI = site index , bi = parameters , i from 0 to 3 .2 . By analyzed , the period of poplar growth could be divided into 4 stages , initial growing period I or seeding stage from age 0 to 2 , fast radial growing period...
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