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The Effects of Light Transmittance Felling on Structure and Productivity of Korean Pine Plantation Communities with Broad-leaved Mixed Species in Maoershan Regions

Author: SongYang
Tutor: MouChangCheng
School: Northeast Forestry University
Course: Ecology
Keywords: Mountain region of the cap children Korean pine plantation Transmittance tending The species composition of the structure Productive forces Plant diversity
CLC: S718.5
Type: Master's thesis
Year: 2008
Downloads: 41
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Abstract


Sample survey with a grid and a diversity index analysis method to study the transmittance tending (translucent, semi-transparent, not opaque) cap children Mountain region \years) species composition, size structure, productivity and plant diversity, and red pine growth process the effects and the comprehensive quantitative evaluation restore of different transmittance tending in the zonal vegetation, timber production and biodiversity maintenance on the basis of the role played by, of a \The results show that: (1) light tending way (translucent, semi-transparent, not translucent) cap child Mountain region days mixed Korean pine forest community species composition structure has a greater impact. Not translucent colony formation of red pine (0.461) was the dominant species, of Mongolia oak (0.131) and aspen (0.107) for the 10 species in the sub-dominant species, the Pentagon maple companion species of broad-leaved Korean pine mixed forest communities; The semi-translucent colony formation of red pine (0.547) was the dominant species, Pinus sylvestris (0.174) and birch (0.144), four sub-dominant species, walnut and other species as companion species of broad-leaved Korean pine forest community; The total light transmittance colony formation of red pine (0.628) was the dominant species, ash (0.265) for the six species of the sub-dominant species, walnut and other companion species of broad-leaved Korean pine mixed forest communities. Therefore, different translucent tending way to make people days mixed Korean pine forest community formed a community of Korean pine and broad-leaved mixed forest of red pine is the dominant species, but the status of Korean pine in each community, sub-dominant and associated species but there are differences. (2) light tending person per day mixed Korean pine forest community size structure has a greater impact. Full light, semi-permeable light and not opaque community, constructive species of pine, associated with the kinds of broad-leaved species of wood species structure (large-diameter timber - diameter = 26cm diameter timber-24cm = diameter at breast height = 12cm diameter timber - diameter at breast height = 10cm ratio) as follows: 3.92%, 51.63%, 44.44%, 1.47%, 49.02%, 64.36% and 1.94%, 24.81%, 73.26%; 4.13%, 47.93%, 50.41%, 0.00%, 38.03%, 61.97 % and 0.00%, 19.88%, 80.12%; 12.50%, 65.63%, 21.88%, 4.84%, 58.84%, 28.74% and 5.15%, 16.49%, 78.35%. The three are both in diameter timber dominant and showed an increasing trend with the intensity of light transmission tending to increase, the proportion of small-diameter timber showed a decreasing trend in the proportion of diameter timber. The Therefore, opaque tending to improve the quality of the wood species of the days mixed Korean pine forest community, and the total light transmittance better than tending semi-translucent tending way, semi-translucent tending way better than not opaque tending. (3) light tending to have a greater impact on the day mixed stock and productivity of the Korean pine forest community, constructive species of red pine and its associated species. Total light transmittance, the semipermeable light translucent community hectares stock volume and productivity were 253.3167,276.7833,234.3483 m to 3/hm and of 6.1785,6.7508,5.7158 m 3/a.hm semipermeable light community (more is not opaque by 18.11%), total light transmittance community center (compared to not opaque by 8.10%), lowest community is not opaque, but the productivity of the three turn over davidiana community (3.039m / a.hm 2) increased 103.3%, 122.1% and 88.1%, respectively; communities in constructive species of red pine-hectare amount and productivity were 137.41,94.86,69.91 m ~ 3/hm ~ 2 and 3.351,2.314,1.705, m ~ 3/a.hm ~ 2, showing a semi-translucent red pine productivity showed an increasing trend with the light transmission intensity and total light transmittance than the semi-permeable light and not transmittance of 44.9% and 96.6%, respectively, not transmittance increased 35.7%; community-associated species hectares stock volume and productivity were 115.91,181.93,164.44 m ~ 3/hm ~ 2 and of 3.739,4.437,4.011 m 3/a.hm 2, semi-translucent. full opaque and not translucent, not opaque, 56.96% / 18.67% and 10.63% compared with the total light transmittance 41.87% and 7.27%. Therefore, semi-translucent tending more conducive to increased productivity of the community and its companion species, translucent tending more conducive to the community in constructive species of red pine increased productivity. (4) light tending \Full light, semi-transparent and non-photic zone red pine annual average DBH increment, annual average tree height growth and average annual plant volume growth were 0.29,0.26 and 0.24cm / a, 0.31,0.26 and 0.24m / a and 0.001189,0.000946 0.000730m 3, / a, the total light transmittance a semipermeable light and not translucent increased 11.54%, 20.83%, 19.23%, 29.17% and 25.69%, 62.88%, translucent light than that transmittance increased 8.33%, 8.3% and 29.59%, respectively. Therefore, translucent tending to more substantial increase red pine diameter at breast height, tree height and plant volume growth, and the total light transmittance tending to promote growth of Korean pine better than the semi-translucent upbringing and not transparent tending. (5) light tending on \Full light transmission, the semipermeable light and translucent community species richness were 27,31,25, semi-transparent (opaque than that increased by 24.0%), total light transmittance center (representing not opaque increased by 8.0% ), not translucent lowest compared with the same three site up the hill the Yanglin community (37) decreased (27.0%, 16.2% and 32.4%); species diversity index (Shannon-Weinerindex) were 1.7700,2.0683 1.7121, the semi-translucent highest (more is not opaque increased by 20.8%), the center of the total light transmittance (than that opaque increased by 3.4%), not opaque minimum, and three better than the davidiana community (1.6289) increased (8.7%, 27.0% and 5.1%). Therefore, semi-translucent tending to maintain species richness and diversity better than a full opaque and not transparent tending. (6) on the basis of the comprehensive evaluation of the results of the study, combined with the dominant use of the direction of the forest, the Mountain region of the cap child \Public Welfare Forest near natural business model and is suitable for commercial forest cultivation artificial business model.

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