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FOREST RESOURCES WANAGEMENT ›› 2019, Vol. 0 ›› Issue (4): 69-73.doi: 10.13466/j.cnki.lyzygl.2019.04.010

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

ZHANG Dongyan1,2(), WANG Dongzhi1(), FAN Dongdong3, ZHANG Jiandong3, LI Dayong4   

  1. 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:2019-05-14 Revised:2019-07-21 Online:2019-08-28 Published:2020-10-20
  • Contact: WANG Dongzhi E-mail:zhdys@163.com;wangdz@126.com

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

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