学术
摘 要:
采用样带网格调查方法，研究大兴安岭22年生人工兴安落叶松沼泽林的群落结构、蓄积量、植物多样性及其沿沼泽-森林过渡带水分环境梯度的变化规律，并与天然沼泽森林进行对比分析，结合经济效益及环境影响，对沼泽-森林人工造林效果进行综合评估，提出沼泽-森林的分类经营模式。结果表明：1）天然沼泽林群落建群种沿沼泽-森林过渡带环境梯度发生明显的更替，而人工落叶松沼泽林均以落叶松为优势种；天然沼泽林的垂直结构比人工落叶松沼泽林完整；2）人工落叶松沼泽林的蓄积量沿着沼泽到森林方向的环境梯度呈增加趋势（4．3497～6．99050·hm^-2a^-1），而天然沼泽林呈减少趋势（6、6898～1、41180·hm^-2a^-11；3）人工落叶松沼泽林的物种丰富度指数较相应生境地段天然沼泽林提高9～25种，而其Shannon-Wiener多样性指数和Jsw均匀度指数却较天然沼泽林下降了0，2214～0．8582和0．2343～0．4042；4）人工落叶松沼泽林的地下水位和泥炭层厚度较天然沼泽林有所下降（分别下降15．5～36．1cm和9．6～25．2cm）；5）在沼泽-森林过渡带内培育落叶松人工林可获得较高经济效益（投入产出比为1：2，4～1：9．6）；6）沼泽森林的分类经营模式为：典型草本沼泽生境应保持原始状态，沼泽-森林过渡带的中下部生境应培育毛赤杨沼泽林，过渡带的中上部生境可以培育人工落叶松沼泽林。[著者文摘]
文章出处:
《林业科学》-2007年43卷10期 -51-58页
分 类 号:
文献标识码:
A
文章编号:
1001-7488（2007）10-0051-08
Comprehensive Evaluation of the Effects Planting in Swamp-Forest in Daxing＇ an Mountains
Mu Changcheng, Sun Xiaoxin, Ni Zhiying ,Yang Ming, Zhang Na （ College of Forestry, Northeast Forestry Univers#y Harbin 150040）
Abstract:
The community structure, stand volume and plant diversity of larch plantation （22 a） and natural swamp-forest were studied by using transect methods along the swamp-forest water environment grads in Daxing＇ an mountains. Furthermore, combined with economic benefit and environmental effects, the effects of man-made forest in swamp-forest ecotone were evaluated, and the management style of swamp-forest was provided. The results showed that ： 1 ） The dominant species of natural swamp-forest varied along the swamp-forest environment grads, but the larch was only dominant species in artificial swamp-forest. The natural swamp-forest was more entity in community vertical structure than artificial swamp-forest. 2） The stand volume of artificial larch swamp-forest was increasing （4.3497～6.99050·hm^-2a^-1 ） along the swamp to forest grads, but that of natural swamp-forest was decreasing （6.898～1、41180·hm^-2a^-11; 3） The species richness index of artificial larch swamp-forest was 9 ～ 25 more than that of natural swamp-forest in the same habit, but the Shannon-Wiener index and Jsw, evenness index of artificial larch swamp-forest were less 0.221 4 - 0.858 2 and 0.234 3 ～ 0,404 2 respectively than those of natural swamp-forest. 4） The underground water level and peat deepness of artificial larch swamp-forest were less 15.5 - 36.1 cm and 9.6 -25.2 cm than those of natural swamp-forest. 5） The benefit of cuhuring larch could be grained in swamp-forest ecotones （the ratio of income and outcome was 1：2.4 ～ 1：9.6）. 6） The management style of swamp-forest was that the natural state should be maintained in the swamp habit, the Alnus sibirica var. hirsute and Larix gmelinii should be cultured in the downland and upland of swamp-forest ecotone, respectively.[著者文摘]
Key words:
Daxing＇ an mountains ; artificial swamp-forest ; stand volume ; plant diversity ; comprehensive evaluation
基金资助:
国家自然科学基金资助项目（30670349）;黑龙江省攻关项目（GA028603-5）.
更多>>免费文章
cqvip.com