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Method for determining first intermediate cutting age of made forest

A determination method and technology of plantation, applied in forestry, application, agriculture, etc., can solve problems such as lack of mechanistic research, and achieve the effect of simple calculation

Inactive Publication Date: 2011-08-17
INST OF FORESTRY CHINESE ACAD OF FORESTRY
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Most of the methods are mainly qualitative and lack of mechanism research

Method used

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  • Method for determining first intermediate cutting age of made forest
  • Method for determining first intermediate cutting age of made forest
  • Method for determining first intermediate cutting age of made forest

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specific Embodiment 1

[0012] Specific embodiment one, described artificial forest is Chinese fir artificial forest, and afforestation density is respectively 1667, 3333, 5000, 6667 and 10000 strains / hm 2 Chinese fir plantation, the first thinning time is 14 years, 10 years, 9 years, 7 years and 6 years;

specific Embodiment 2

[0013] Specific embodiment two, described artificial forest is masson pine artificial forest, and afforestation density is respectively 1667, 3333, 5000 and 6667 strains / hm 2 Masson pine plantation, the first thinning time was 9 years, 8 years, 7 years and 6 years respectively.

[0014] The principle of the present invention is described in detail below:

[0015] Using the yearly observation data of the 18-year-old Chinese fir and 11-year-old Masson pine afforestation density test forests, the relationship between the average distance between trees in different afforestation densities, the ratio of the crown width and the age is analyzed, and the fitting is carried out with a polynomial. The results showed that: the age of initial thinning of Chinese fir and masson pine plantation can be determined by the age of the inflection point of the polynomial; D) and 10000 plants / hm 2 (E)) The first thinning time is about 14 years, 10 years, 9 years, 7 years and 6 years respectively;...

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Abstract

The invention discloses a method for determining a first intermediate cutting age of a made forest. The first intermediate cutting time of the made forest is determined by the ratios of the average distances among trees in the made forest to crown diameters and inflection points of curvilinear equations for ages. For a Chinese fir made forest, namely the Chinese fir made forest with the density of plantation of 1,667, 3,333, 5,000, 6,667 and 10,000 plants / hm<2> respectively, the first intermediate cutting time is 14 years, 10 years, 9 years, 7 years and 6 years respectively; and for a pinus massoniana made forest, namely the pinus massoniana made forest with the density of plantation of 1,667, 3,333, 5,000 and 6,667 plants / hm<2> respectively, the first intermediate cutting time is 9 years, 8 years, 7 years and 6 years respectively. By the method, the calculation is simple, and the first intermediate cutting age can be directly determined by the density of plantation.

Description

technical field [0001] The invention relates to a method for determining the first thinning age of an artificial forest. Background technique [0002] In forest management, thinning is an important measure throughout the entire growth process of a forest stand, and it is also one of the ways to use wood. In the thinning technology system, the thinning time is an important technical element. In order to obtain the best effect of thinning and fully develop the production potential of the stand, it is necessary to determine the appropriate thinning time. Timely thinning can expand the nutrient space of reserved trees and improve the health status of stands by adjusting tree composition and stand density. materials, accelerate the cultivation of follow-up resources, and then improve the economic, ecological and social benefits of forests. [0003] In the prior art, since the 1970s, a lot of research has been done on the initial period of thinning, thinning method, thinning in...

Claims

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Application Information

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IPC IPC(8): A01G23/00
Inventor 惠刚盈张连金
Owner INST OF FORESTRY CHINESE ACAD OF FORESTRY
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