干旱区生态环境知识资源中心(Arid): 宁夏半干旱区柠条锦鸡儿灌木林生长特征

Arid

	宁夏半干旱区柠条锦鸡儿灌木林生长特征
其他题名	Growth Characteristics of Caragana Korshinskii Shrubbery in Semi-arid Regions of Ningxia Hui Autonomous Region
	程杰 1; 刘永辉 1; 田瑛 2
来源期刊	水土保持通报
ISSN	1000-288X
出版年	2016
卷号	36 期号:1 页码:332-336
中文摘要	[目的]揭示柠条锦鸡儿灌木林最大生长潜力,掌握其生长规律与更新过程,为柠条锦鸡儿林资源合理开发利用提供科学依据。[方法]针对宁夏半干旱区24 a柠条锦鸡儿灌木林生长过程的定位监测资料,用定量分析方法揭示柠条锦鸡儿灌木林生长特征。[结果](1)柠条锦鸡儿灌木林的生长变化受水分影响,其变化趋势与土壤水分相吻合,表现为坡下部灌丛生长最好,坡中部次之,坡上部最弱。就坡中上部而言,0-8 m土壤贮水量对柠条锦鸡儿灌木丛生长具有显著影响。生长中期的柠条锦鸡儿灌木林,其分枝数量、地径和地上生物量在不同生长坡位间表现出显著或极显著的差异性,而到生长的后期,随着生长年限的延长柠条生理生态特性发生了较大变化,植株衰老退化严重;(2)柠条锦鸡儿灌木林生长除受其自身生物学特性支配外,主要受环境因子和生长指标的双重影响,其生物量在坡下部受分枝数的影响,坡中部受分枝数、地径和株高的共同作用,坡上部则受地径、株高和冠幅的影响;(3)各生长因子均与积温和土壤蒸发量呈极显著的正相关关系,而积温在各生长坡位均为重要影响因子。[结论]水热条件是影响柠条锦鸡儿灌木林生长的主要限制因子。
英文摘要	[Objective]The objective of this study is to clarify the growth rule(i.e.maximum growth potential) and regenerating process of Caragana korshinskii and in order to provide basis for the rational utilization of C.korshinskii.[Methods]We evaluated the 24-years in-situ observation records of growth process of C. korshinskii in the semi-arid regions of Ningxia Hui Autonomous region using quantitative statistical analysis. [Results](1)The growth of C.korshinskii was mainly impacted by water,especially the soil moisture.The shrubbery at the lower slope always grew better than the ones at the middle and upper slope.Soil water contents at soil layer of 0 mto 8 min the middle or upper slope significantly influenced the growth of C.korshinskii. During the middle period of C.korshinskii growth,branching numbers,ground diameter and the aboveground biomass varied significantly among different parts of slopes.However,the senescence of plants was severe at the later stage since the physiological and ecological functions of C.korshinskii degraded year by year.(2)Except its biological characters,environmental factors and growth indexes also impacted the growth of C.korshinskii.The biomass at the lower slope was influenced by the numbers of branching.The biomass at the middle slope was impacted by the branching number,ground diameter and the plant height, while ground diameter,plant height and crown width controlled the shrub biomass at the upper slope. (3)All growth indexes were significantly positively related with the cumulative temperature and evaporation. The former was important factor at all parts of slopes.[Conclusion]Hydrothermal conditions are the main limitation factors for the growth of C.korshinskii.
中文关键词	半干旱区 ; 不同坡位 ; 柠条锦鸡儿 ; 生长特征
英文关键词	semi-arid regions different parts of slope Caragana korshinskii growth characteristics
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5653256
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234923
作者单位	1.国家林业局西北林业调查规划设计院, 西安, 陕西 710048, 中国; 2.宁夏固原市林业局, 固原, 宁夏 756000, 中国
推荐引用方式 GB/T 7714	程杰,刘永辉,田瑛. 宁夏半干旱区柠条锦鸡儿灌木林生长特征[J],2016,36(1):332-336.
APA	程杰,刘永辉,&田瑛.(2016).宁夏半干旱区柠条锦鸡儿灌木林生长特征.水土保持通报,36(1),332-336.
MLA	程杰,et al."宁夏半干旱区柠条锦鸡儿灌木林生长特征".水土保持通报 36.1(2016):332-336.