Volume 29 Issue 6
Nov.  2012
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ZOU Yi-qiao, DU Qun, GE Hong-li. An age-based growth model applied to no-age conditions[J]. Journal of Zhejiang A&F University, 2012, 29(6): 889-896. doi: 10.11833/j.issn.2095-0756.2012.06.013
Citation: ZOU Yi-qiao, DU Qun, GE Hong-li. An age-based growth model applied to no-age conditions[J]. Journal of Zhejiang A&F University, 2012, 29(6): 889-896. doi: 10.11833/j.issn.2095-0756.2012.06.013

An age-based growth model applied to no-age conditions

doi: 10.11833/j.issn.2095-0756.2012.06.013
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  • Corresponding author: DU Qun
  • Received Date: 2012-01-04
  • Rev Recd Date: 2012-03-22
  • Publish Date: 2012-12-20
通讯作者: 陈斌, bchen63@163.com
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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An age-based growth model applied to no-age conditions

doi: 10.11833/j.issn.2095-0756.2012.06.013
    Corresponding author: DU Qun

Abstract: Many growth models use age as an independent variable;however,many times ages are not only hard to measure but also not meaningful,especially in an uneven-aged stand. This study used the Continuous Forest Inventory (CFI) to test tree characteristics not based on age to determine if an age-based model could be used in no-age conditions. Tree data from nine Pinus massoniana of Longquan County,Lishui City,Zhe-jiang Province,China were used to build an age-based diameter at breast height (DBH) growth model. Then DBH data was updated in the CFI for all of Lishui City. Two methods were employed:a single point method (SP) that used a former DBH datum to estimate an age which then estimated its later DBH,and a two-point method (TP) that used two former DBH data to estimate an age and a growth index (GI) which were then used to estimate its later DBH. Results showed that both SP and TP had better accuracy than directly using the age-based model. Also,TP was more adaptive and behaved better than SP. Thus,age-based models could be used in CFI where DBH data are available but no ages.[Ch,2 fig. 5 tab. 14 ref.]

ZOU Yi-qiao, DU Qun, GE Hong-li. An age-based growth model applied to no-age conditions[J]. Journal of Zhejiang A&F University, 2012, 29(6): 889-896. doi: 10.11833/j.issn.2095-0756.2012.06.013
Citation: ZOU Yi-qiao, DU Qun, GE Hong-li. An age-based growth model applied to no-age conditions[J]. Journal of Zhejiang A&F University, 2012, 29(6): 889-896. doi: 10.11833/j.issn.2095-0756.2012.06.013

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