干旱区生态环境知识资源中心(Arid): 小叶锦鸡儿根系生长对土壤水分和氮肥添加的响应

Arid

	小叶锦鸡儿根系生长对土壤水分和氮肥添加的响应
其他题名	Responses of fine root growth of Caragana microphylla shrub plantation to irrigation and nitrogen addition in a semi-arid region of northern China
	黄刚; 赵学勇; 苏延桂; 黄迎新; 崔建垣
ISSN	1000-1522
出版年	2009
卷号	31 期号:5 页码:73-77
中文摘要	采用微管法结合内生生长袋方法,研究了科尔沁沙地成龄小叶锦鸡儿灌木根系生长动态、根系分布及细根生产对旱季补水和氮肥添加的响应.结果表明:旱季补水,氮肥添加和"水+氮"处理均增加了微管表面的根长密度和细根生产,但只有氮肥添加和"水+氮"对根长密度和细根生产(0～20 cm)有显著影响.在旱季,旱季补水、氮肥添加及"水+氮"均没有显著增加根长密度;在雨季,氮肥添加显著增加了根长密度,同时促进了根系在土壤深层的分布.说明在低氮土壤中,当土壤水分适宜时,提高土壤氮肥有效性有助于沙地灌木的根系生长,提高灌木人工林的稳定性.
英文摘要	Root growth,distribution and production of a desert shrub in arid and semiarid areas can be regulated by water and nitrogen.We examined the responses of root growth(root length density and fine root production)to short-term irrigation,nitrogen addition and the interaction of irrigation and nitrogen addition in a 21-year-old artificial Caragana microphylla Lam.plantation in the Horqin Sandy Land in northern China.Root length density(RLD)and fine root production(FRP)in the growth season were estimated using minirhizotrons and ingrowth cores,respectively.Irrigation,nitrogen addition and their interaction significantly increased RLD(0-140 cm),and FRP(0-20 cm).In dry season,irrigation,nitrogen addition and their interaction did not have significant effects on RLD.In wet season,nitrogen addition had a significant effect on RLD by promoting root distribution into deeper soil layer.These results indicate that in the low N soil condition,root development,distribution and production of desert shrubs are strongly stimulated by N availability when soil water content is in the proper status.
中文关键词	根长密度 ; 细根生产 ; 微管 ; 灌木 ; 氮肥 ; 土壤水分
英文关键词	root length density fine root production minirhizotrons shrub nitrogen soil water
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:3656625
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223269
作者单位	中国科学院寒区旱区研究所奈曼沙漠化研究站
推荐引用方式 GB/T 7714	黄刚,赵学勇,苏延桂,等. 小叶锦鸡儿根系生长对土壤水分和氮肥添加的响应[J]. 中国科学院西北生态环境资源研究院,2009,31(5):73-77.
APA	黄刚,赵学勇,苏延桂,黄迎新,&崔建垣.(2009).小叶锦鸡儿根系生长对土壤水分和氮肥添加的响应.,31(5),73-77.
MLA	黄刚,et al."小叶锦鸡儿根系生长对土壤水分和氮肥添加的响应".31.5(2009):73-77.