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Forest and Grassland Resources Research >

2019 , Vol. 0 >Issue 4: 69 - 73

DOI: https://doi.org/10.13466/j.cnki.lyzygl.2019.04.010

Relationship Between Crown Width and DBH of Larix pricipis-rupperchtii with Different Site Types

  • Dongyan ZHANG ,
  • Dongzhi WANG ,
  • Dongdong FAN ,
  • Jiandong ZHANG ,
  • Dayong LI
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  • 1. College of Forestry of Hebei Agricultural University,Baoding,Hebei 071000,China
    2. College of Business of Hebei Agricultural University,Baoding,Hebei 071000,China
    3. Saihanba Mechanical Forest Farm of Hebei Province,Weichang,Hebei 068450,China
    4. Mulan Weichang State-owned Forest Farm Administration Bureau of Hebei Province,Weichang,Hebei 068450,China

Received date: 2019-05-14

  Revised date: 2019-07-21

  Online published: 2020-10-20

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Abstract

The optimal crown amplitude prediction model for Larix principis-rupprechtii plantation was constructed to provide scientific reference for studying its growth and development rules,site quality assessment and productivity prediction.In this study,the plantation of Larix principis-rupprechtii in Saihanba mechanical forest farm in Hebei province was used as the research object.Data from 155 sample plots(30 m by 30 m) were used to classify site types based on the factor analysis and cluster analysis.Constructing crown predication model of Larix principis-rupprechtii plantation on different site types.The results showed that altitude,slope and aspect were the main site factors affecting the crown growth of Larix principis-rupprechtii plantations,and the site types were classified into two ones.According to the determination coefficient R 2 of 0.9795 and 0.9834,respectively,Bias of them were respectively 0.0001and0.8259,and RMSE of them were respectively 0.0019 and 0.65718,a site prediction model of the crown amplitude was determined,and a comprehensive comparative analysis of high altitude CW=-2.5972+0.6211D-0.0098D 2and low altitude CW=[D/(4.9823+0.2059D)] 2 equation predicts the growth of Larix principis-rupprechtii plantation in Saihanba mechanical forest farm,which provides a theoretical basis for the scientific management of Larix principis-rupprechtii plantation.

Key words： site type; crown prediction model; plantation; Larix principis-rupprechtii; DBH

Cite this article

Dongyan ZHANG , Dongzhi WANG , Dongdong FAN , Jiandong ZHANG , Dayong LI . Relationship Between Crown Width and DBH of Larix pricipis-rupperchtii with Different Site Types[J]. Forest and Grassland Resources Research, 2019 , 0(4) : 69 -73 . DOI: 10.13466/j.cnki.lyzygl.2019.04.010

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