毛乌素沙地南缘半固定沙丘风沙输移物特征

doi:10.7522/j.issn.1000-694X.2015.00022

摘要/Abstract

摘要： 通过连续动态观测,获取毛乌素沙地南缘典型半固定沙丘表面风沙输移物,测量了风沙活动中不同沙丘部位的风蚀深度,并对风沙输移物及其养分进行了初步分析。结果表明:风沙活动期间沙丘顶部的风蚀深度最大,沙丘迎风坡次之,而丘间地的风蚀深度最小;沙丘顶部和迎风坡的输移物以中沙和细沙为主,养分含量较低,丘间地颗粒较细且养分含量较高;土壤养分含量与颗粒大小存在显著的负相关关系。迎风坡和丘顶处在风蚀亚环境而难以被植被固定,进而加速了风蚀过程;丘间地风沙活动较弱,风积物中养分含量较高的细颗粒物质促进了植被的发育,因而减弱了局地风速。

关键词: 风沙活动, 粒度, 养分, 半固定沙丘, 毛乌素沙地

Abstract: By continuous dynamic observation, we collected the drifting sand on the surface of typical semi-fixed dunes in the south edge of Mu Us Sandy Land. Besides, we analyzed the erosion depths in different dune positions as well as nutrient contents of sand transport materials. The results indicate that the erosion depths on the top of the dune are the largest during wind activity, with upwind slope the less and interdune the least. The sand transport materials on the top of the dune and the upwind slope are mostly composed with medium particles and fine particles, which are low in nutrient contents. However, the interdune has more fine particles and high nutrient contents. Soil nutrient contents have a negative relationship with sand particle size. The upwind slope and the top of the dune are in the environment of wind erosion, thus they cannot easily be fixed by vegetation and wind erosion process is accelerated. In contrast, the wind activity in the interdune is relatively weak, and the fine particles with high nutrient contents promote vegetation growth and development, which lead to weaker wind velocity.

Key words: wind activity, grain size, nutrients, semi-fixed dunes, Mu Us Sandy Land

中图分类号:

P931.3

王广涛, 王训明, 郎丽丽. 毛乌素沙地南缘半固定沙丘风沙输移物特征[J]. 中国沙漠, 2016, 36(2): 281-286.

Wang Guangtao, Wang Xunming, Lang Lili. Features of Drifting Sand of Semi-fixed Dunes in the South Edge of Mu Us Sandy Land of China[J]. JOURNAL OF DESERT RESEARCH, 2016, 36(2): 281-286.

参考文献

[1] Livingstone I,Warren A.Aeolian Geomorphology:An Introduction[M].Essex,England:Addison Wesley Longman Limited,1996.
[2] 吴正.风沙地貌学[M].北京:科学出版社,1987.
[3] Maestre F T,Escudero A.Is the patch size distribution of vegetation a suitable indicator of desertification processes?[J].Ecology,2009,90(7):1729-1735.
[4] Wang X M,Yang Y,Dong Z B,et al.Responses of dune activity and desertification in China to global warming in the twenty-first century[J].Global and Planetary Change,2009,67(3/4):167-185.
[5] Wang X M.Sandy desertification:borne on the wind[J].Chinese Science Bulletin,2013,58(20):2395-2403.
[6] 闫峰,吴波.近40 a毛乌素沙地荒漠化过程研究[J].干旱区地理,2013,36(6):987-996.
[7] 郭坚,王涛,韩邦帅,等.近30 a来毛乌素沙地及其周边地区沙漠化动态变化过程研究[J].中国沙漠,2008,28(6):1017-1021.
[8] 赵哈林.沙漠化的生物过程及退化植被的恢复机理[M].北京:科学出版社,2007.
[9] 李新荣,马凤云.沙坡头地区固沙植被土壤水分动态研究[J].中国沙漠,2001,21(3):217-222.
[10] 李新荣,张志山,王新平,等.干旱区土壤-植被系统恢复的生态水文学研究进展[J].中国沙漠,2009,29(5):845-852.
[11] 王志,王蕾,刘连友,等.毛乌素沙地南缘沙丘水分的时空分布特征[J].干旱区研究,2007,24(1):61-65.
[12] 邱开阳,谢应忠,许冬梅,等.毛乌素沙地南缘沙漠化临界区域土壤养分的空间异质性[J].生态学报,2010,30(22):6052-6062.
[13] 谭明亮,段争虎,陈小红.流沙地恢复过程中土壤特性演变研究[J].中国沙漠,2008,28(4):685-689.
[14] 杨梅焕,曹明明,朱志梅,等.毛乌素沙地东南缘沙漠化过程中土壤理化性质分析[J].水土保持通报,2010,30(2):169-172.
[15] 陈渭南,董光荣,董治宝.中国北方土壤风蚀问题研究的进展与趋势[J].地球科学进展,1994,9(5):6-12.
[16] 杨秀春,严平,刘连友.土壤风蚀研究进展与评述[J].干旱地区农业研究,2003,21(4):147-153.
[17] 董治宝,陈广庭.内蒙古后山地区土壤风蚀问题初论[J].土壤侵蚀与水土保持学报,1997,3(2):84-90.
[18] 董治宝,高尚玉,董光荣.土壤风蚀预报研究述评[J].中国沙漠,1999,19(4):312-317.
[19] 海春兴,刘宝元,赵烨.土壤湿度和植被盖度对土壤风蚀的影响[J].应用生态学报,2002,13(8):1057-1058.
[20] 李玉宝.干旱半干旱区土壤风蚀评价方法[J].干旱区资源与环境,2000,14(2):48-52.
[21] 严平,董光荣,张信宝,等.¹³⁷Cs法测定青藏高原土壤风蚀的初步结果[J].科学通报,2000,45(2):199-204.
[22] 张春来,邹学勇,董光荣,等.植被对土壤风蚀影响的风洞实验研究[J].水土保持学报,2003,17(3):31-33.
[23] Li F R,Zhao W Z,Liu J L,et al.Degraded vegetation and wind erosion influence soil carbon,nitrogen and phosphorus accumulation in sandy grasslands[J].Plant and Soil,2009,317(1/2):79-92.
[24] Li J,Okin G S,Alvarez L J,et al.Effects of wind erosion on the spatial heterogeneity of soil nutrients in two desert grassland communities[J].Biogeochemistry,2008,88(1):73-88.
[25] Li J,Okin G S,Alvarez L J,et al.Sediment deposition and soil nutrient heterogeneity in two desert grassland ecosystems,southern New Mexico[J].Plant and Soil,2009,319(1/2):67-84.
[26] 尚爱军,栾爱梅.陕北荒漠化地区农业持续发展技术体系研究[J].干旱地区农业研究,2002,20(3):121-123.
[27] 哈斯,庄燕美,王蕾,等.毛乌素沙地南缘横向沙丘粒度分布及其对风向变化的响应[J].地理科学进展,2006,25(6):42-51.
[28] 吕贻忠,马兴旺.荒漠化土壤养分变化的影响因素研究进展[J].生态环境,2003,12(4):473-477.
[29] 李海东,沈渭寿,邹长新,等.雅鲁藏布江山南宽谷风沙化土地土壤养分和粒度特征[J].生态学报,2012,32(16):4981-4992.