干旱区生态环境知识资源中心(Arid): 尖叶胡枝子地下生物量累积变化

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	尖叶胡枝子地下生物量累积变化
其他题名	Study on the Change of Underground Biomass Accumulation of Lespedez hedysaroides
	孙启忠 1; 赵淑芬 2; 张志如 1; 徐丽君 1; 高丽 1
ISSN	1001-4675
出版年	2007
卷号	24 期号:6 页码:805-809
中文摘要	通过对栽培条件下尖叶胡枝子地下不同直径根系组分和生物量的测定及模拟分析,结果表明:尖叶胡枝子的根系垂直空间分布为典型的表层聚积型,根系主要集中在0～20 cm,根系垂直分布特征参数beta的值较小;生长1 080 d(生长3年)的尖叶胡枝子根系入土深度可达100 cm,其中在0～40 cm的土层中,以粗根为主,占总根量的81.54%,40 cm之下以细根为主;根系密度随着尖叶胡枝子生长期的延长呈明显增大的趋势.
英文摘要	In this study,the components of roots with different diameters and the underground biomass of Lespedez hedysaroide plants growing for different days are measured and analyzed.The study area(900 m a.s.l.) is located in Linxi County,Inner Mongolia,where it belongs to the arid continental monsoon climate,the annual air temperature and the monthly temperature in July and January vary in ranges of 4～5 ℃,20～22 ℃ and-13～-17 ℃,the extremely maximum and minimum temperatures are 40.4 ℃ and-32.2℃,respectively,and the accumulated temperature ≥10 ℃ is 2 600 ℃;the annual precipitation varies in a range of 320～380 mm and occurs mainly during the period from June to August,and the annual evaporation is over 1 800 mm;the frost-free period varies in a range of 125~130 days;the soil is chestnut soil.The results reveal that the vertical distribution of root ecological niche of L.hedysaroides is characterized by root accumulation in surface soil layer.The roots distribute mainly in soil layer of 0～20 cm in depth,and the characteristic parameter of root vertical distribution(beta) is low.The roots of L.hedysaroides plants growing for 1 080 days(three years) can grow deep into soil layer of 100 cm in depth.Thick roots distribute mainly in soil layer of 0～40 cm in depth,their proportion is as high as 81.25% of the total,and the thin roots distribute manly in soil layer deeper than 40 cm.Root density increases significantly with prolonging the growing time of L.hedysaroides plants.
中文关键词	尖叶胡枝子(L. hedysaroides) ; 根系 ; 生物量 ; 垂直分布
英文关键词	Lespedeza hedysaroides root diameter biomass root vertical distribution
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:3003752
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221010
作者单位	1.中国农业科学院,草原研究所, 呼和浩特, 内蒙古 010010, 中国; 2.内蒙古林西县,草原工作站, 林西, 内蒙古 025250, 中国
推荐引用方式 GB/T 7714	孙启忠,赵淑芬,张志如,等. 尖叶胡枝子地下生物量累积变化[J],2007,24(6):805-809.
APA	孙启忠,赵淑芬,张志如,徐丽君,&高丽.(2007).尖叶胡枝子地下生物量累积变化.,24(6),805-809.
MLA	孙启忠,et al."尖叶胡枝子地下生物量累积变化".24.6(2007):805-809.