ISWC OpenIR  > 水保所知识产出(1956---)
黄土丘陵区不同土地利用类型下的深层土壤水分变化特征
缪凌1; 董建国1,2; 汪有科1,2; 蒋观滔1
2016
Source Publication水土保持研究
Volume23Issue:2Pages:13-18
Abstract

人工林草地土壤干化问题正在日益严重的威胁着黄土高原人工植被建设成效。利用2013年5月—2014年
11月的定位监测0—900cm深层土壤水分资料分析得出:(1)研究区四种不同土地利用类型剖面土壤水分均表现出
上层波动剧烈,下层变化较小的特征。上层土壤含水量具有与明显的季节性波动变化特征,代表当年降水的入渗深
度,枣林、苜蓿草地、杏林和农地降水入渗深度范围分别为0—240,0—180,0—200和0—120cm。(2)深层土壤含水
量年内变化较小,枣林、苜蓿草地和杏林土壤水分在根系吸水作用下有微弱减少,农地作物对深层土壤水分利用有
限,得到降水补给土壤水分有所增加。土地利用方式对深层土壤水环境的影响大小依次为苜蓿草地>杏林>枣林>
农地。(3)枣林、苜蓿草地和杏林深层土壤水分均存在一定的亏缺,苜蓿草地亏缺最为严重,平均亏缺度为67.7%,杏
林和枣林平均亏缺度为55.4%和48.7%。深层土壤水分的变化规律能够反映长时段不同土地利用类型对土壤水分
生态环境的深刻影响,对黄土高原植被的恢复、建设及评价具有重要意义。

Other Abstract

In the Loess Hilly and Gully Region where climatic conditions are dry with severe water shortage,
several plants causes soil dessication and ecological degradation.In order to compare the differences and characteristics
of deep soil water under different land use patterns,relevant water moisture data in 0—900cm soil
layers was analyzed through May 2013to November 2014.Results showed that:(1)the soil profile under
different land use patterns could be divided into two layers according to the vertical variation.The upper content
changed dramatically,and the deep soil moisture was stable;the temporal variations of the upper soil
water were accordance with the change of rainfall in the wet season,it represented the depths of rainfall infiltration
and plant-root water uptake,the depths of rainfall infiltration for jujube,almond,alfalfa and farmland
were 240,200,180and 120cm,respectively;(2)soil water in deep layers changed little within a year,
soil water contents of alfalfa grassland,jujub and almonds decreased slightly,however,crops had a shallow
root system,utilization of deep layer soil water was limited;the water environment in deep soil layers was
significantly affected by plant types,and the effect degrees decreased in the order:alfalfa grassland>jujube>almonds
>farmland;(3)alfalfa grassland had led to the serious soil moisture deficit,the average degree was 67.7%,and jujube
and almonds were 55.4%,48.7%,respectively.It is vital to investigate temporal variability of deep soil moisture
for the restoration,reconstruction and evaluation of vegetation in the Loess Plateau.

Keyword黄土高原 土地利用 深层土壤水分 水分亏缺
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8594
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学水土保持研究所
2.中国科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
缪凌,董建国,汪有科,等. 黄土丘陵区不同土地利用类型下的深层土壤水分变化特征[J]. 水土保持研究,2016,23(2):13-18.
APA 缪凌,董建国,汪有科,&蒋观滔.(2016).黄土丘陵区不同土地利用类型下的深层土壤水分变化特征.水土保持研究,23(2),13-18.
MLA 缪凌,et al."黄土丘陵区不同土地利用类型下的深层土壤水分变化特征".水土保持研究 23.2(2016):13-18.
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