干旱区生态环境知识资源中心(Arid): 连续干旱对土壤干层深度及植物生存的影响

Arid

	连续干旱对土壤干层深度及植物生存的影响
其他题名	Impact of the Continuous Drought on the Depth of Dry Soil Layer
	付明胜 1; 钱卫东 1; 朱萍 2; 马光亮 1
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2002
卷号	19 期号:2 页码:71-74
中文摘要	以绥德县为基点，分析研究了陕北1997－2001年连续五年，由于降水总量少、有效性差，气候变暖，以及沙尘暴频率加快，使年内时段干旱发生次数多，持续时间长，波及范围广，经济损失大，成为历史上罕见的特大干旱。造成草地、农耕地0－100cm以内土壤含水量均低于4.2％（干土重），林地0－180cm内仅3.6％，刺槐林地0－500cm平均仅4.2％，其直接后果是以林草地地力衰退为特征的人工林草地土壤干化日益严重，导致群落衰败以致大片死亡。但还有些植物经过灾变的考验，表现出高度抗旱耐高温特性，为我们以后防旱抗旱、退耕还林（草）及作物布局对品种的选择提供了科学依据。
英文摘要	By taking Suide County of Shaaxi Province as a case study, this paper analyzes the frequently occurred drought for 5 years running from 1997 to 2001 due to the reduction of the total precipitation, poor effectiveness of precipitation, climate warming and frequent occurrence of sand-dust storms. The drought was characterized by a long duration, vast impact spatial extent and resulting in a serious economic loss, and was the extraordinarily serious in history. The drought made the average moisture contents of soils of the grasslands and farmlands (0～100 cm in depth), forestlands (0～180 cm in depth), and locust forestlands (0～500 cm in depth) be lower than 4.2, only 3.6 and 4.2% respectively. The direct consequences of the drought are to make the serious reduction of soil fertility of the grasslands and forestlands, increasingly serious dryness of soils under the artificially planted forests and grasses, and degeneration and death of the plant communities in a large area. Some plants, however, have a high resistance to drought, and they provide the scientific basis for selecting the plant species suitably growing in an arid environment so as to take the precautions against drought, withdraw from farming to planting forests and grasses, and distribute crops rationally.
中文关键词	干旱 ; 土壤干层 ; 降水有效性
英文关键词	dry soil layer precipitation effectiveness drought soil moisture content
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:990155
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/203206
作者单位	1.黄河水土保持绥德治理监督局, 绥德, 陕西 718000, 中国; 2.黄河上中游管理局, 西安, 陕西 710043, 中国
推荐引用方式 GB/T 7714	付明胜,钱卫东,朱萍,等. 连续干旱对土壤干层深度及植物生存的影响[J],2002,19(2):71-74.
APA	付明胜,钱卫东,朱萍,&马光亮.(2002).连续干旱对土壤干层深度及植物生存的影响.干旱区研究,19(2),71-74.
MLA	付明胜,et al."连续干旱对土壤干层深度及植物生存的影响".干旱区研究 19.2(2002):71-74.