[1]李新凯,卜崇峰,李宜坪,等.放牧干扰背景下藓结皮对毛乌素沙地土壤水分与风蚀的影响[J].水土保持研究,2018,25(06):22-28.
　LI Xinkai,BU Chongfeng,LI Yiping,et al.Influences of Moss Crusts on Soil Moisture and Wind Erosion Under Grazing Disturbance in Mu Us Sandy Land[J].Research of Soil and Water Conservation,2018,25(06):22-28.
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放牧干扰背景下藓结皮对毛乌素沙地土壤水分与风蚀的影响

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 25 期数: 2018年06期 页码: 22-28 栏目: 出版日期: 2018-10-26
Title:
Influences of Moss Crusts on Soil Moisture and Wind Erosion Under Grazing Disturbance in Mu Us Sandy Land
作者:
李新凯1,2, 卜崇峰1,3, 李宜坪4, 李炳垠3, 鞠孟辰3, 王清玄1,2
1. 中国科学院 水利部 水土保持研究所, 陕西 杨凌 712100;
2. 中国科学院大学, 北京 100049;
3. 西北农林科技大学 水土保持研究所, 陕西 杨凌 712100;
4. 西北农林科技大学 水利与建筑工程学院, 陕西 杨凌 712100
Author(s):
LI Xinkai1,2, BU Chongfeng1,3, LI Yiping4, LI Bingyin3, JU Mengchen3, WANG Qingxuan1,2
1. Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Institute of Soil and Water Conservation, Northweast A & F University, Yangling, Shaanxi 712100, China;
4. College of Water Resources and Architectural Engineering, Northweast A & F University, Yangling, Shaanxi 712100, China
关键词:
藓结皮; 土壤水分; 风蚀; 毛乌素沙地
Keywords:
moss crusts; soil moisture; wind erosion; Mu Us Sandy Land
分类号:
S157
摘要:
为掌握在放牧干扰背景下生物结皮对土壤水分与风蚀的影响，并探讨适度干扰改善土壤水分状况的可行性，在毛乌素沙地选定的典型样地建立监测小区，进行了土壤水分和风蚀的定位监测试验。结果表明：（1）藓结皮的存在能够提高沙蒿、沙柳和柠条0—80 cm的根系层土壤水分，但同时也使80—200 cm的深层土壤含水量下降；植被间无干扰的藓结皮同样能提高土壤含水量；重度干扰有利于提高0—80 cm的根系层和80—200 cm的深层土壤水分含量。（2）藓结皮的存在有利于减轻沙蒿、柠条和沙柳下方沙土风蚀，3种灌木投影下方藓结皮小区的风蚀量与植被下裸地相比分别减少了92.8%，11.3%和104.2%；藓结皮受到剧烈及以上强度的干扰会使土壤更易遭受风蚀。（3）在本研究中，重度干扰的藓结皮在不加剧风蚀的同时，有利于提高0—200 cm深度内的土壤水分，肯定了适度干扰的可行性。
Abstract:
This research has implemented a stationary monitoring experiment of soil moisture and wind erosion within the typical sampling plot in Mu Us Sandy Land, which is for the purpose of understanding the influences of biological soil crusts on soil moisture and wind erosion, and discusses the feasibility of moderate disturbance in improving the condition of soil moisture. The results indicated that: (1) for Artemisia desertorum, Salix psammophila and Caragana korshinskii, the moss crusts were able to improve the soil moisture of root layer of 0—80 cm but meanwhile reduced the soil moisture of deep layer of 80—200 cm; soil moisture also could be increased by the undisturbed moss crusts among plants; for root layer of 0—80 cm and deep layer of 80—200 cm, ‘severe disturbance’ was positive for the improving of soil moisture; (2) moss crusts were beneficial for reducing sediment by wind erosion under Artemisia desertorum, Salix psammophila and Caragana korshinskii, the quantity of wind erosion of moss crusts under Artemisia desertorum, Salix psammophila and Caragana korshinskii decreased by 92.8%, 11.3% and 104.2%,respectively, compared with the bare land under these three plants; it is more vulnerable for soil to be eroded by wind if the soil suffered ‘excessive disturbances’ or above;(3) in this research, the moss crusts with ‘severe disturbance’ was in favor of improving soil moisture in 0—200 cm if the wind erosion would not aggravate in this case, which confirmed the feasibility of moderate disturbance.

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备注/Memo

收稿日期:2017-12-20;改回日期:2018-01-16。
基金项目:国家自然科学基金“基于遥感的毛乌素沙地生物结皮空间分布与碳储量评估”（41541008）
作者简介:李新凯(1991-),男,河南南阳人,硕士研究生,研究方向为生物结皮。E-mail:lxinkai_iswc@163.com
通讯作者:卜崇峰(1977-),男,陕西榆林人,博士,研究员,主要从事生物结皮与水土保持工程研究。E-mail:buchongfeng@163.com

更新日期/Last Update: 1900-01-01