本文關(guān)鍵詞：撫育間伐對(duì)杉木牛長影響的成效分析　出處：《中南林業(yè)科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 杉木 撫育間伐 撫育成效 湖南省

【摘要】：森林撫育是促進(jìn)林木生長、提高林木質(zhì)量、實(shí)現(xiàn)森林多種效益最大化的必不可少的措施。杉木在湖南人工用材林中具有舉足輕重的影響,是森林撫育的重點(diǎn)樹種。本研究依托中央財(cái)政森林撫育補(bǔ)貼試點(diǎn)項(xiàng)目,以撫育樣地和對(duì)照樣地為一組,在湖南省范圍內(nèi)設(shè)置了 8組共16個(gè)樣地,包括杉木中齡林和近熟林,觀測(cè)撫育對(duì)林木生長的影響,連續(xù)4年,分析撫育對(duì)杉木胸徑、樹高、單株材積和單株生物量年生長和連年生長的影響,對(duì)撫育成效進(jìn)行評(píng)價(jià),以期為進(jìn)一步做好森林撫育工作提供科學(xué)依據(jù)。主要研究結(jié)果如下:1)撫育樣地林分平均胸徑生長量明顯大于對(duì)照樣地。撫育樣地林分平均胸徑年生長量為B1(蘇仙區(qū))最高達(dá)1.7 cm·a-1,林分平均胸徑年生長量排序?yàn)锽1(蘇仙區(qū))A1(攸縣)D1(金洞區(qū))/H1(岳陽縣)C1(蘇仙區(qū))G1(岳陽縣)E1(金洞區(qū))F1(瀘溪縣);林分胸徑年均生長量撫育與對(duì)照差值以D(金洞區(qū))為最大值為0.45 cm·a-1,F(瀘溪縣)最低為0.07 cm·a-1。撫育對(duì)杉木的胸徑生長具有明顯促進(jìn)作用,平均撫育效益達(dá)到47.7%。撫育效益最高的金洞區(qū)樣地,撫育效益大于70.0%,撫育效益最低為攸縣樣地,撫育效益不足10.0%。中齡林的撫育效果明顯好于近熟林。2)撫育樣地與對(duì)照樣地林分平均樹高年生長量相差不大,林分樹高年均生長量撫育與對(duì)照差值相差蘇仙區(qū)B最大為0.12 m·a-1,金洞區(qū)D產(chǎn)生了 0.03負(fù)值�？傮w上,撫育間伐對(duì)杉木樹高生長的促進(jìn)作用不大,平均撫育效益只有14.5%。3)撫育樣地杉木單株材積生長量明顯大于對(duì)照樣地。單株材積年均生長量A1(攸縣)最大為0.0273 m3·a-1,排序?yàn)锳1(攸縣)D1(金洞區(qū))H1(岳陽縣)B1(蘇仙區(qū))G1(岳陽縣)E1(金洞區(qū))C1(蘇仙區(qū))F1(瀘溪縣);單株材積年均生長量撫育與對(duì)照的差值D(金洞區(qū))最大為0.0088 m3·a-1,F(瀘溪縣)最小為0.0015 m3·a-1。撫育對(duì)杉木的材積生長具有明顯促進(jìn)作用,平均撫育效益達(dá)到37.5%。撫育效益最高的金洞區(qū)E組樣地,撫育效益大于60.0%,撫育效益最低為攸縣樣地,撫育效益不足10.0%。4)撫育樣地杉木單株生物量生長量明顯大于對(duì)照樣地。單株生物量年均生長量A1(攸縣)最高為15.14 kg·a-1,排序?yàn)锳1(攸縣)D1(金洞區(qū))H1(岳陽縣)G1(岳陽縣)B1(蘇仙區(qū))E1(金洞區(qū))C1(蘇仙區(qū))F1(瀘溪縣);單株生物量年均生長量撫育與對(duì)照的差值H(岳陽縣)最大為4.8 kg·a-1,F(瀘溪縣)最低為0.78kg·a-1。撫育對(duì)杉木的生物量增長具有明顯促進(jìn)作用,平均撫育效益達(dá)到36.0%。撫育效益最高的金洞區(qū)E組樣地,撫育效益大于60.0%,撫育效益最低為攸縣樣地,撫育效益不足10.0%。
[Abstract]:Forest tending is an indispensable measure to promote forest growth, improve forest quality and maximize forest benefits. Chinese fir has a significant influence in Hunan artificial timber forest. This study relies on the pilot project of central fiscal forest tending subsidy, and set up 8 groups of 16 sample plots in Hunan province, taking tending sample plots and opposite plots as a group. The effects of tending on the growth of Chinese fir (Cunninghamia lanceolata) for 4 years were observed. The effects of tending on DBH, height, volume and biomass of Chinese fir were analyzed. The effect of upbringing was evaluated. The main results are as follows: 1). The average DBH growth of tending plots was significantly larger than that of the control plots, and the annual average DBH growth of tending plots was up to 1.7 cm 路a-1 in Suxian district. The order of annual average DBH growth of stand is B1 (Suxian District) A1 (Youxian County D1) (Jindong District Ju / H1 (Yueyang County C1) (Suxian District G1) (Yueyang County F1) (Jindong District F1 (Luxi County)); The difference between average annual increment of DBH and control was 0.45 cm 路a ~ (-1) in Jindong area. The lowest value of F (Luxi County) was 0.07 cm 路a ~ (-1). Tending had obvious promoting effect on the growth of DBH of Chinese fir, and the average tending benefit was 47.7 cm 路a ~ (-1). The upbringing benefit was more than 70.00.The lowest was you county sample land. The tending effect of middle age forest was better than that of near mature forest. The difference between the average annual growth of stand height and the difference between the difference of the difference between the average growth of stand height and the control was 0.12 m 路a ~ (-1) in Suxian district, and 0.03 negative value was produced in D in Jindong area. Tending and thinning had little effect on the growth of Cunninghamia lanceolata. The average tending benefit was only 14.5. 3) the volume growth per plant of Chinese fir was significantly larger than that of the control plot, and the maximum annual volume growth A _ 1 (you county) was 0.0273 m3 路a ~ (-1). The order is A1 (Youxian D1) (Yueyang County B1 (Yueyang County B1) (Yueyang County G1) (Yueyang County D1) (Suxian District F1) (Luxi County 1); The difference between the average annual growth of volume per plant and that of the control was 0.0088 m3 路a ~ (-1) in the Jindong area, and the maximum value was 0.0088 m ~ (3) 路a ~ (-1). The minimum of F (Luxi County) is 0.0015 m3 路a ~ (-1). Tending plays a significant role in promoting the volume growth of Chinese fir (Cunninghamia lanceolata). The average tending benefit was up to 37.5.The group E sample land in Jindong district, which had the highest tending benefit, had tending benefit more than 60.00.The lowest tending benefit was you county sample land. The annual biomass growth of Chinese fir was 15.14 kg 路a ~ (-1) in the tending sample area, which was significantly larger than that in the same land, and the annual biomass growth per plant was 15.14 kg 路a ~ (-1) in Youxian County, the highest annual biomass growth rate was (15.14 kg 路a ~ (-1)). The order is A1 (Youxian D1) (Yueyang County G1 (Yueyang County G1) (Yueyang County B1) (Suxian District D1) (Suxian District F1) (Suxian District F1 (Luxi County); The difference between the average annual growth of biomass per plant and that of the control, H (Yueyang County), was 4.8 kg 路a ~ (-1). F (Luxi County) was the lowest 0.78 kg 路a ~ (-1). Tending significantly promoted the biomass growth of Chinese fir, and the average tending benefit was 36.0. The upbringing benefit is more than 60.0, the lowest is you county sample land, and the tending benefit is less than 10.0.
【學(xué)位授予單位】：中南林業(yè)科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：S791.27
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本文編號(hào)：1423369