干旱区生态环境知识资源中心(Arid): 不同因素影响下突发性强降雨对沙拐枣的危害以塔里木沙漠公路防护林生态工程为例

Arid

	不同因素影响下突发性强降雨对沙拐枣的危害以塔里木沙漠公路防护林生态工程为例
其他题名	Injury of unexpected strong precipitation to Calligonum under different factors: a cast of the shelterbelt eco-project along the Tarim Desert highway
	张建国; 徐新文; 雷加强; 李生宇
ISSN	1000-6060
出版年	2009
卷号	32 期号:3 页码:346-352
中文摘要	塔里木沙漠公路防护林生态工程全长436 km,造林树种以抗逆性较强的沙拐枣(Calligo-num L.)、柽柳(Tamarix L.)、梭梭(Haloxylon Bunge)等优良防风固沙灌木为主,采用高矿化度地下水滴灌.2005年5月,公路沿线出现了罕见的突发性强降雨,由此引起的表层土壤盐分淋溶造成了沙拐枣大量死亡.本研究采用线路调查和随机抽样方法,在突发性强降雨后对塔里木沙漠公路防护林带内沙拐枣死亡率进行了调查,并对调查结果及其原因进行了分析,结果表明:沙拐枣死亡率(1)随林龄的增加而减小;(2)随矿化度的升高而增大;(3)垄间平沙地>过渡区>高大沙垄垄体;(4)林带中央>公路旁>林带外围.
英文摘要	The shelterbelt eco-project along the Tarim Desert highway is 436 kilometers long, which is drip-irriga-ted with high saline groundwater. Its main afforestation species are Tamarix, Calligonum, and Haloxylon, which are good windbreak and sand fixation trees with strong salt-resistance, strong drought-resistance, blown-sand-resist-ance , et al. Because of strong soil evaporation and strong capillarity in such extreme arid environment in the Takli-makan Desert, soil salt from irrigation moves upwards with soil water and accumulates on surface soil gradually, e-ven forms salt crusts. Salt of crusts is easily leached downs by precipitation, if the depth is the same as main distri-bution layer of pants roots, salt-injuries happen easily which can lead to plants death when serious. Precipitation, especially unexpected strong precipitation occurs infrequently. An infrequent unexpected strong precipitation ap-peared along the Tarim Desert highway in May, 2005, which induced salt leaching of soil surface salt crusts and caused many Calligonum die. In this study, route investigation and random sampling are used to investigate the mo-ralities of Calligonum under conditions of different forest age, different mineralization of irrigation water, different site type, and distribution location in the shelterbelts after the unexpected strong precipitation, and the investigation results were analyzed. The results are as follows: (1) The mortality of Calligonum reduces with the forest age in-cresing; (2) the mortality increases with the mineralization of irrigation water; (3 ) the mortality under different site type show that ground among longitudinal dunes > transition region > high and large sand dune; (4) the mortality of different distribution location in the shelterbelts shows that forest-belts central > nearby road > forest belt periphery. Salt-injury is one of main problems the shelterbelts eco-project faces, this study can provide theoret-ical basis of maintenance management and sustainable use for it. There are still many issues and need further re-search , such as process and mechanism of salt accumulation on surface soil under drip-irrigation with high saline water, process and mechanism of salt leaching induced by unexpected precipitation, injury mechanism of salt leac-hing to plants, prevention and treatment of plants salt-injuries under drip-irrigation with saline water, and so on.
中文关键词	突发性强降雨 ; 咸水滴灌 ; 盐分淋溶 ; 沙拐枣死亡率
英文关键词	the shelterbelt eco-project along the Tarim Desert Highway unexpected strong precipitation drip-irrigation with saline water salt leaching mortality of Calligonum
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:3761616
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223548
作者单位	中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	张建国,徐新文,雷加强,等. 不同因素影响下突发性强降雨对沙拐枣的危害以塔里木沙漠公路防护林生态工程为例[J]. 中国科学院新疆生态与地理研究所,2009,32(3):346-352.
APA	张建国,徐新文,雷加强,&李生宇.(2009).不同因素影响下突发性强降雨对沙拐枣的危害以塔里木沙漠公路防护林生态工程为例.,32(3),346-352.
MLA	张建国,et al."不同因素影响下突发性强降雨对沙拐枣的危害以塔里木沙漠公路防护林生态工程为例".32.3(2009):346-352.