| 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 |
| 李新凯1,2; 卜崇峰1,3; 李宜坪4; 李炳垠3; 鞠孟辰3
|
| 2018
|
发表期刊 | 水土保持研究
|
卷号 | 25期号:6页码:22-28 |
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 — 80cm 的根系层土壤水分,但同时也使 80 — 200cm 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 — 80cm 的根系层和 80 — 200cm 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 — 200cm 深度内的土壤水分,肯定了适度干扰的可行性。 |
其他摘要 | 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 influ -
ences of biological soil crusts on soil moisture and wind erosion , and discusses the feasibility of moderate dis -
turbance in improving the condition of soil moisture.The results indicated that
:(
1 ) for Artemisia deserto -
rum , Salix psammophila and Caragana korshinskii , the moss crusts were able to improve the soil moisture
of root layer of 0 — 80cm but meanwhile reduced the soil moisture of deep layer of 80 — 200cm ; soil moisture
also could be increased by the undisturbed moss crusts among plants
; for root layer of 0 — 80cm and deep
layer of 80 — 200cm ,‘ 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 psam -
mophila 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 — 200cm if the wind erosion would not aggravate in this case
, whichconfirmed the feasibility of moderate disturbance. |
关键词 | 藓结皮
土壤水分
风蚀
毛乌素沙地
|
收录类别 | 中文核心期刊要目总览
|
语种 | 中文
|
文献类型 | 期刊论文
|
条目标识符 | sbir.nwafu.edu.cn/handle/361005/10095
|
专题 | 水保所知识产出(1956---)
|
作者单位 | 1.中国科学院水利部 水土保持研究所 2.中国科学院大学 3.西北农林科技大学 水土保持研究所 4.西北农林科技大学 水利与建筑工程学院
|
推荐引用方式 GB/T 7714 |
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(6):22-28.
|
APA |
李新凯,卜崇峰,李宜坪,李炳垠,&鞠孟辰.(2018).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,25(6),22-28.
|
MLA |
李新凯,et al."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 25.6(2018):22-28.
|
文件名:
|
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_李新凯.pdf
|
格式:
|
Adobe PDF
|
此文件暂不支持浏览
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论