抚育间伐对不同林龄人工林生长特征及其碳汇量分析
发布时间：2019-04-02 20:46
【摘要】：随着多年的发展,我国在社会、经济和文化等各个方面都有了长足的进步。传统的天然林已然不能满足我国的现有发展需求,因此必须发展人工林用以弥补天然林的不足。抚育间伐是促进人工生长的主要技术手段,但是抚育间伐活动究竟对哪种人工林的效果最佳,抚抚育间伐后人工林生长和效益能够得到多大程度的增长,则需要进一步研究和描述。本文依托湖南省森林抚育补贴成效监测项目,根据人工林在湖南的分布情况和所占比重,选择杉木人工林、马尾松人工林和阔叶树人工林为研究对象。通过设立不同林龄段的抚育样地和对照样地,杉木人工林为6年、8年、10年、13年、14年、15年和16年;马尾松人工林为6年、8年、10年和13年,阔叶树人工林为6年、8年、13年和14年,可以将人工林大致划分为幼龄段(1-10年)和中龄段(11-20年)。全部样地都进行了两次调查,两次调查的间隔时间都为4年。调查了全部样地的胸径和树高等生长特征、蓄积量、生物量和碳汇量等效益指标的变化情况。通过调查发现抚育间伐活动对人工林生长起到了促进作用,不同林龄段其促进效果不同,抚育间伐对某些林龄段人工林经济效益和生态效益的增长有促进作用而对另一些林龄段的经济效益和生态效益的增长有消减的作用,具体得到了结论如下:(1)抚育间伐对不同林龄段人工林树高胸径生长的影响抚育间伐能够增加杉木、马尾松和阔叶树人工林的树高和胸径的生长量。其抚育样地的平均胸径生长量比对照样地分别高出2.1cm、1.35cm和1.24cm,抚育样地的平均树高生长量比对照样地分别高出了 0.75m、0.65m和0.4m。抚育间伐对中龄段的杉木、马尾松和阔叶树人工林其胸径和树高的生长的促进作用要高于幼龄段人工林,因此抚育间伐对杉木、马尾松和阔叶树人工林树高和胸径的生长促进作用主要体现在中龄段。(2)抚育间伐对不同林龄段人工林生物量和碳汇量增长的影响抚育间伐对幼龄段的杉木工林的生物量和碳汇量的增长量起到了促进作用,而对幼林段的马尾松和阔叶树人工林的生物量和碳汇量的增长没有明显的促进作用。抚育间伐对中龄段的马尾松人工林的生物量和碳汇量的增长起到了明显的促进作用,对中龄段的杉木人工林的生物量和碳汇量的增长没有明显的促进作用,而对中林段的阔叶树的生物量和碳汇量的增长起到了消减作用。(3)抚育间伐对不同林龄段人工林蓄积量增长的影响抚育间伐对幼龄段的杉木和阔叶树人工林的蓄积量的增长起到了促进作用,而对幼龄段马尾松人工林的蓄积量增长没有明显的作用。抚育间伐对中龄段的马尾松人工林的蓄积量的增长起到了促进作用,而对杉木和阔叶树人工林的蓄积量的增长起到了消减作用。
[Abstract]:With the development of many years, our country has made great progress in all aspects such as society, economy and culture. The traditional natural forest can not meet the existing development needs of our country, so it is necessary to develop artificial forest to make up for the shortage of natural forest. Thinning is the main technique to promote artificial growth, but the effect of thinning on which plantation is the best, and the extent to which the growth and benefit of artificial forest can be increased after thinning. Further study and description are needed. In this paper, according to the distribution and proportion of plantation in Hunan Province, the Chinese fir plantation, Masson pine plantation and broad-leaved tree plantation were selected as the research objects based on the monitoring project of forest rearing subsidy effectiveness in Hunan Province. The results showed that the plantation of Cunninghamia lanceolata was 6 years, 8 years, 10 years, 13 years, 14 years, 15 years and 16 years. The plantation of Pinus massoniana is 6 years, 8 years, 10 years and 13 years, and broad-leaved trees plantations are 6 years, 8 years, 13 years and 14 years. The plantation can be roughly divided into juvenile (1-10 years) and middle-aged (11-20 years). Two surveys were conducted on all sites, each four years apart. The growth characteristics of DBH and tree height, accumulation, biomass and carbon sequestration of all plots were investigated. Through the investigation, it was found that the thinning activity promoted the growth of artificial forest, and the promoting effect was different in different forest age segments, and the effect of thinning on the growth of artificial forest was different in different age groups. Thinning can promote the growth of plantation economic benefit and ecological benefit in some forest age sections, and reduce the increase of economic benefit and ecological benefit in other forest age sections. The conclusions are as follows: (1) the effects of thinning on the height and DBH growth of plantation trees at different ages can increase the height and DBH growth of Chinese fir, Masson pine and broad-leaved plantation. The average DBH growth of the tending plot was 2.1cm, 1.35cm and 1.24cm higher than that of the control, respectively. The average tree height growth of the tending plot was 0.75m, 0.65m and 0.4m higher than that of the control, respectively. The effect of thinning on the growth of Chinese fir, Masson pine and broad-leaved tree plantation was higher than that of young stage plantation, therefore, the middle-aged Chinese fir, Masson pine and broad-leaved tree plantation had a better effect on the growth of Cunninghamia lanceolata. The growth promotion of height and DBH of Pinus massoniana and broad-leaved plantation mainly reflected in the middle-age section. (2) the effects of thinning on the biomass and carbon sequestration in different age stages of Chinese fir trees in the young stage of Cunninghamia lanceolata (Cunninghamia lanceolata var. massoniana L.) The growth of biomass and carbon sequestration in industrial forests has played an important role in promoting the growth of forest biomass and carbon sequestration. However, the biomass and carbon sequestration of Pinus massoniana and broad-leaved plantation did not increase obviously. Thinning significantly promoted the growth of biomass and carbon sequestration of Pinus massoniana plantation in the middle age, but had no significant effect on the growth of biomass and carbon sequestration of Chinese fir plantation in the middle age. The growth of biomass and carbon sequestration of broad-leaved trees in middle and middle stands was reduced. (3) the effects of thinning on the accumulation of Chinese fir and broad-leaved trees in different age segments of Chinese fir and broad-leaved trees in the young stage of Chinese fir and broad-leaved trees were affected by thinning in the middle and middle stands. (3) the effects of thinning on the accumulation of Chinese fir and broadleaved trees at different ages The increase in the volume of, However, there was no obvious effect on the volume increase of Pinus massoniana plantation in young stage. Thinning promoted the growth of the volume of Pinus massoniana plantation in the middle age and reduced the increase of the volume of Chinese fir and broad-leaved plantation.
【学位授予单位】：中南林业科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S753;S718.5
，
本文编号：2452908
[Abstract]:With the development of many years, our country has made great progress in all aspects such as society, economy and culture. The traditional natural forest can not meet the existing development needs of our country, so it is necessary to develop artificial forest to make up for the shortage of natural forest. Thinning is the main technique to promote artificial growth, but the effect of thinning on which plantation is the best, and the extent to which the growth and benefit of artificial forest can be increased after thinning. Further study and description are needed. In this paper, according to the distribution and proportion of plantation in Hunan Province, the Chinese fir plantation, Masson pine plantation and broad-leaved tree plantation were selected as the research objects based on the monitoring project of forest rearing subsidy effectiveness in Hunan Province. The results showed that the plantation of Cunninghamia lanceolata was 6 years, 8 years, 10 years, 13 years, 14 years, 15 years and 16 years. The plantation of Pinus massoniana is 6 years, 8 years, 10 years and 13 years, and broad-leaved trees plantations are 6 years, 8 years, 13 years and 14 years. The plantation can be roughly divided into juvenile (1-10 years) and middle-aged (11-20 years). Two surveys were conducted on all sites, each four years apart. The growth characteristics of DBH and tree height, accumulation, biomass and carbon sequestration of all plots were investigated. Through the investigation, it was found that the thinning activity promoted the growth of artificial forest, and the promoting effect was different in different forest age segments, and the effect of thinning on the growth of artificial forest was different in different age groups. Thinning can promote the growth of plantation economic benefit and ecological benefit in some forest age sections, and reduce the increase of economic benefit and ecological benefit in other forest age sections. The conclusions are as follows: (1) the effects of thinning on the height and DBH growth of plantation trees at different ages can increase the height and DBH growth of Chinese fir, Masson pine and broad-leaved plantation. The average DBH growth of the tending plot was 2.1cm, 1.35cm and 1.24cm higher than that of the control, respectively. The average tree height growth of the tending plot was 0.75m, 0.65m and 0.4m higher than that of the control, respectively. The effect of thinning on the growth of Chinese fir, Masson pine and broad-leaved tree plantation was higher than that of young stage plantation, therefore, the middle-aged Chinese fir, Masson pine and broad-leaved tree plantation had a better effect on the growth of Cunninghamia lanceolata. The growth promotion of height and DBH of Pinus massoniana and broad-leaved plantation mainly reflected in the middle-age section. (2) the effects of thinning on the biomass and carbon sequestration in different age stages of Chinese fir trees in the young stage of Cunninghamia lanceolata (Cunninghamia lanceolata var. massoniana L.) The growth of biomass and carbon sequestration in industrial forests has played an important role in promoting the growth of forest biomass and carbon sequestration. However, the biomass and carbon sequestration of Pinus massoniana and broad-leaved plantation did not increase obviously. Thinning significantly promoted the growth of biomass and carbon sequestration of Pinus massoniana plantation in the middle age, but had no significant effect on the growth of biomass and carbon sequestration of Chinese fir plantation in the middle age. The growth of biomass and carbon sequestration of broad-leaved trees in middle and middle stands was reduced. (3) the effects of thinning on the accumulation of Chinese fir and broad-leaved trees in different age segments of Chinese fir and broad-leaved trees in the young stage of Chinese fir and broad-leaved trees were affected by thinning in the middle and middle stands. (3) the effects of thinning on the accumulation of Chinese fir and broadleaved trees at different ages The increase in the volume of, However, there was no obvious effect on the volume increase of Pinus massoniana plantation in young stage. Thinning promoted the growth of the volume of Pinus massoniana plantation in the middle age and reduced the increase of the volume of Chinese fir and broad-leaved plantation.
【学位授予单位】：中南林业科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S753;S718.5
，
本文编号：2452908
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