干旱区生态环境知识资源中心(Arid): 六盘山叠叠沟华北落叶松人工林地上生物量的分配特征

Arid

	六盘山叠叠沟华北落叶松人工林地上生物量的分配特征
其他题名	Allocation Characteristics of Aboveground Biomass of Larix principis-rupprechtii Plantation in the Diediegou Watershed of Liupan Mountains
	韩新生 1; 王彦辉 2; 李振华 2; 王艳兵 2; 姚依强 2; 张桐 2
来源期刊	西北林学院学报
ISSN	1001-7461
出版年	2016
卷号	31 期号:4 页码:12-18
中文摘要	生物量是评价森林生态系统结构与功能的重要指标,也反映了森林植被的生态适应性。在宁夏六盘山半干旱区的叠叠沟小流域,以当地优势林分华北落叶松人工林为对象,采用烘干法及生物量经验公式,调查了1个半阴坡和1个阴坡上共12个森林样地的地上植被生物量,分析了生物量的分配特征。结果表明:该流域内华北落叶松林地上生物量平均为59.20 t·hm~(-2);阴坡林分地上生物量为63.49 t·hm~(-2),较半阴坡高15.62%。在坡面上,生物量在坡中下部和下部最大,平均为71.75 t·hm~(-2);其次是坡上部、中上部和坡脚,平均为58.08 t·hm~(-2);最小的是坡顶,平均为37.45 t·hm~(-2)。在垂直空间上,各层次生物量分配表现为:乔木层(67.95%)>枯落物层(28.68%)>草本层(2.62%)>灌木层(0.75%),即乔木及枯落物(主要是难分解的松针)约占林分生物量的97%。乔木层不同径级林木的地上生物量分配呈正态分布,其中胸径为10~16 cm的林木占比例最大,为60.19%,其次是径级>16 cm的林木(20.88%),最小的是径级<10 cm的林木(18.92%)。林木各器官的分配比例依次为:树干(56.51%)>树枝(28.66%)>树皮(11.58%)>树叶(3.24%)。综上可知,该半干旱小流域内华北落叶松林生物量在阴坡居多,特别是坡中下部,这可能与降水及水分坡面分配格局有很大关系;冠层林木,特别是大径材林木贡献了林分生物量的绝大多数,而林下灌草及幼树生长较差,贡献极小,建议进行适当择伐,改善林分结构。
英文摘要	Biomass is an important indicator to evaluate the structure and function of forest ecological system, and it reflects the ecological adaptability of forest vegetation.The biomass of forest vegetation aboveground was evaluated at 12 plots of Larix principis-rupprechtii plantation on two representative slopes(a shady slope and a semi-shady slope),using biomass drying method and empirical formula in the small watershed of Diediegou within the semi-arid region of Liupan Mountains,northwest China,and the distribution and allocation of the forest biomass were analyzed.The results showed that the average aboveground biomass of L.principis-rupprechtii plantation was 59.20 t·hm~(-2) in the Diediegou watershed. The aboveground biomass of shady slope was 63.49 t·hm~(-2),15.62% higher than that in the semishady slope.In the entire slope,biomass reached the maximum at middle-down and down slope positions, with an average of 71.75 t·hm~(-2),followed by the up slope position,middle-up and foot,with an average of 58.08 t·hm~(-2).The smallest value was at the top slope,with an average of 37.45 t·hm~(-2).The biomass in different layers were tree layer(67.95%)>humus layer(28.68%)>herb layer(2.62%)>shrub layer (0.75%)in the vertical space,implying tree and humus layer(mainly pine needles that were difficult to be degraded)biomass accounted for about 97%.The allocation between diameter classes of aboveground biomass followed a pattern of normal distribution,with a maximum of DBH in 10-16 cm,accounted for 60.19%of the total,followed by the wood diameter class more than 16 cm (20.88%).The smallest was wood diameter class less than 10 cm (18.92%).Distribution ratio the forest biomasses in different organs were stem (56.51%)>branch(28.66%)>bark(11.58%)>leaf(3,24%).To sum up,the biomass of L.principis-rupprechtii plantation was larger in shady slope with a better conditions of soil moisture in the semi-arid small watershed,especially in the down slope,which may have a great relationship with the distribution pattern of precipitation and water on a slope.Canopy trees,especially those with large-diameter contributed the vast majority of the total biomass,whereas understory shrub,grass and young trees grew poorly,contributed very little.Therefore,appropriate selective cutting with a purpose of improving stand structure of the L.principis-rupprechtii plantation was recommended.
中文关键词	半干旱 ; 华北落叶松 ; 生物量 ; 分配
英文关键词	semi-arid Larix principis-rupprechtii biomass allocation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:5753926
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235125
作者单位	1.宁夏农林科学院荒漠化治理研究所, 国家林业局森林生态环境重点实验室, 银川, 宁夏 750002, 中国; 2.中国林业科学研究院森林生态环境与保护研究所, 国家林业局森林生态环境重点实验室, 北京 100091, 中国
推荐引用方式 GB/T 7714	韩新生,王彦辉,李振华,等. 六盘山叠叠沟华北落叶松人工林地上生物量的分配特征[J],2016,31(4):12-18.
APA	韩新生,王彦辉,李振华,王艳兵,姚依强,&张桐.(2016).六盘山叠叠沟华北落叶松人工林地上生物量的分配特征.西北林学院学报,31(4),12-18.
MLA	韩新生,et al."六盘山叠叠沟华北落叶松人工林地上生物量的分配特征".西北林学院学报 31.4(2016):12-18.