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Chinese Agricultural Science Bulletin ›› 2014, Vol. 30 ›› Issue (4): 12-16.doi: 10.11924/j.issn.1000-6850.2013-2983

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Research on the Growth Process of Fokienia hodginsii(Dunn) Variant Types Plantation in Sanming City, Fujian

  

  • Received:2013-11-13 Revised:2013-11-29 Online:2014-02-05 Published:2014-02-05

Abstract: To formulate effective management measures of Fokienia hodginsii (Dunn) variant types in Sanming City, Fujian Province. The stem analysis method coupled with Richards equation was used in the analysis of its growth process. The results showed that the current annual increment of tree height had four peaks, the largest current annual tree height increment 0.85 m/a appeared at the age of 8, and the average annual increment firstly intersected with annual increment at age 16. The current annual increment of breast diameter (DBH) occurred two peaks, they were 0.76 cm/a (8th year) and 2.44 cm/a (24th year). The current annual increment and average annual increment of breast diameter intersected with each other at the age of 28, the rapid growth period of current annual DBH increment ranged from 0 to 28 years and its growth increment was 26.08 cm, which accounted for 87.81% of the total growth increment. The current annual timber volume increment reached a maximum value (0.0354 m3) at 26th year. The F. hodginsii (Dunn) variant types plantation did not reach quantitative maturity at the age of 32. The Richards equation can well describe the growth process of tree height, breast diameter and timber volume of F. hodginsii (Dunn) variant types as followed: H=22.47×(1-e-5.28)1.66,R=0.9832;D=1326.49×(1-e-2.13)1.45,R=0.9291;V=3.89×(1-e-2.51)3.90,R=0.9979. The growth rate of F. hodginsii (Dunn) variant types presented decreasing tendency, and the growth rate of tree height, breast diameter and timber volume declined 45.31%, 81.86% and 52.4% respectively during 0-10 years, while the average growth rates of tree height, breast diameter and timber volume declined only 0.47%, 0.74% and 1.47% respectively during 10-32 years. The results may provide a scientific basis for forest production.