干旱区生态环境知识资源中心(Arid): 祁连山排露沟流域中山带青海云杉林生长与海拔梯度上环境因子的关系

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	祁连山排露沟流域中山带青海云杉林生长与海拔梯度上环境因子的关系
其他题名	Relations between growth of Picea crassifolia forest and environmental factors on different altitudinal gradients in mid-mountain belt of Pailugou Basin of Qilian Mountains, Gansu Province
	赵维俊; 刘贤德; 成彩霞; 李小燕
来源期刊	中南林业科技大学学报
ISSN	1673-923X
出版年	2015
卷号	35 期号:2 页码:72-78
中文摘要	选择分布在祁连山排露沟流域中山带(海拔2900~3300 m)分布的青海云杉林为研究对象,研究了其生长与海拔梯度上环境因子的关系。研究结果表明:(1)青海云杉胸径和树高大小从郁闭林2900 m到高山林线3300 m处的变化规律表明,青海云杉生长在海拔3200 m以上受到环境胁迫作用明显;青海云杉更新苗和非更新苗密度在海拔梯度上的变化规律也证实了这一点;(2)随海拔梯度的增加,青海云杉林地年降水量递增率平均值为19.94 mm/100 m;年均气温递减率大小为-0.67℃/100 m,青海云杉生长最低气温为-1.72℃;热量条件在一定程度上抑制了海拔3200 m以上青海云杉的生长;(3)土壤剖面年均温度沿海拔高度的增加不断减小,而土壤含水量不断增加;土壤有机质、全氮和有效氮含量随海拔梯度的增加其含量也不断增加;土壤全磷、有效磷、全钾和有效钾含量随海拔梯度的增加没有明显的变化规律;不同海拔土壤酸碱性呈碱性;青海云杉林地有机质和全氮含量丰富,但是随海拔梯度增加土壤温度降低使得有效养分供应不足;(4)方差分析表明,海拔梯度影响下的环境因子对不同海拔青海云杉生长的影响大小顺序为:土壤化学性质(10.261)>气象因子(7.900)>土壤物理性质(2.535),林地土壤化学性质是影响林木生长的最关键因子。上述研究结果有望为祁连山森林培育和保护管理提供理论参考和数据支持,也为干旱、半干旱区亚高寒山地森林植被对环境变化响应机制提供理论依据。
英文摘要	By selecting Picea crassifolia forests on altitude of 2 900 ~ 3 300 meters in mid-mountain zone of Pailugou watershed in Qilian Mountains as research object, the relations between the growth of P. crassifolia forests in different altitudinal gradients and environmental factors (climate and soil) were investigated and studied. The results are as follows:(1)In the range from closed forest in 2 900 meters above sea level to alpine timberline in 3 300 meters, the growth of DBH and tree height of P. crassifolia were obviously affected by environmental stress effects, this was confirmed by the changing laws of regeneration seedlings and non-regeneration seedlings on different altitudinal gradients. (2)With the increase of altitude per 100 meters, the average annual precipitation growth rate in P. crassifolia forests was 19.94 mm, the average annual temperature lapse rate was -0.67 ℃; P. crassifolia growth minimum temperature was -1.72 ℃ ; To a certain extent, the heat conditions inhibited the growth of P. crassifolia which grew at the altitude of 3200 meters. (3) In different soil profiles, the average temperature of soil continuously decreased with increasing altitude, while soil moisture constantly increased with increasing altitude; The contents of organic matter, total N and available N in soil increased with the increasing altitude; The contents of total P, available P, total K and available K in soil had no obvious change with the increasing altitude; The pH of soil in different altitude was alkaline; The contents of organic matter and total nitrogen were rich in P. crassifolia forests, but the soil temperature in the forests decreases with the increase of altitude, which affected the effective of nutrient supply. (4) The variance analysis indicated that the order of effects of environmental factors under the influences of altitude gradients on the growth of Picea crassifolia in different altitude ranked from big to small as follows: soil chemical properties (10.261) > meteorological factors (7.900) > soil physical properties (2.535), this proved that soil chemical properties of forest land was the key factor to influence tree growth. The findings of the study can provide theory reference and data support for forest cultivation and protection in Qilian Mountains, and also present theory basis for responses of sub alpine mountain region vegetations in arid and semi-arid areas to environmental change mechanism.
中文关键词	青海云杉林 ; 林木生长 ; 海拔梯度 ; 环境因子 ; 土壤理化性质 ; 祁连山
英文关键词	Picea crassifolia altitudinal gradient environmental factor physical and chemical property of soil the Qilian Mountains
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:5375218
来源机构	甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233844
作者单位	甘肃农业大学林学院, 甘肃省森林生态与冻土水文水资源重点实验室, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	赵维俊,刘贤德,成彩霞,等. 祁连山排露沟流域中山带青海云杉林生长与海拔梯度上环境因子的关系[J]. 甘肃农业大学,2015,35(2):72-78.
APA	赵维俊,刘贤德,成彩霞,&李小燕.(2015).祁连山排露沟流域中山带青海云杉林生长与海拔梯度上环境因子的关系.中南林业科技大学学报,35(2),72-78.
MLA	赵维俊,et al."祁连山排露沟流域中山带青海云杉林生长与海拔梯度上环境因子的关系".中南林业科技大学学报 35.2(2015):72-78.