干旱区生态环境知识资源中心(Arid): 毛乌素沙地微地形对土壤凝结水分布的影响

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	毛乌素沙地微地形对土壤凝结水分布的影响
其他题名	Effects of Microtopography on the Distribution of Soil Condensation Water on A Sand Dune in Mu Us Sandland
	郭冰寒 1; 王若水 1; 肖辉杰 1; 郎晓辉 2; 郭玉静 2; 刘涛 1
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2016
卷号	30 期号:4 页码:102-109
中文摘要	为研究毛乌素沙地微地形对土壤凝结水分布的影响,在宁夏盐池荒漠生态系统定位观测站进行野外试验,以当地典型微地形沙丘为研究对象,采用微渗仪称重法测量沙丘各观测点的凝结水量,同步观测各观测点的气象因子,研究凝结水在沙丘不同坡位的分布及受气象因子影响的变化规律。结果表明:雨前各坡位凝结速率和日均凝结水量均显著低于雨后(P≤0.05)。雨前各坡位的凝结速率差异不显著,平均凝结速率为0.007 mm/h,阴坡和阳坡日均凝结水量均随坡位的升高而减小,且与坡位高度呈显著的线性相关关系(P≤0.05),雨前阳坡的日均凝结水量为0.073 mm,多于阴坡的0.059 mm,坡顶的凝结水量最少(0.041 mm)。雨后阴坡的凝结速率和凝结水量随坡位的升高而增多(不包括坡顶),阳坡的凝结速率和凝结水量日均值随坡位的升高而减少,凝结水量与坡位的高度呈显著线性负相关关系(P≤0.05)。雨后阴坡的日均凝结水量为0.310 mm,高于阳坡的0.259 mm,坡顶的日均凝结水量最少(0.151 mm)。雨后,随着时间的推移,各坡位的日凝结水量先增多后减少,第3日凝结水量最多,此后凝结水量逐渐减少,直至趋于稳定。研究结果可为毛乌素沙地的土壤水分平衡和水资源评价提供理论依据,并为该地区的生态恢复提供重要理论支撑。
英文摘要	A field experiment was carried out in Mu Us Sandland from August to September,2015,to investigate the effects of microtopography and meteorological factors on the distribution of soil condensate on a sand dune.The amount of soil condensation water for different positions on the sand dune was measured by microlysimeters and the corresponding meteorological factors were monitored synchronously.The results indicated that the condensation rates and daily amounts of soil condensation water for each slope position before rain were significantly lower than those after rain.The average condensation rate before rain for different slope positions was 0.007 mm/h and no significance was found between all the slope positions.For both shady and sunny slopes,the amount of daily soil condensation water decreased as the height of slope position increased,and significant linear correlation(P≤0.05)was found between them before rain.The amount of daily soil condensation water on sunny slope before rain was 0.073 mm,which was more than that on shady slope(0.059 mm)and the amount was the least on the top of slope(0.041 mm).The condensation rates and the amounts of daily soil condensation water on shady slope increased as the height of slope position increased after rain.However the condensation rate and the daily amounts of soil condensation water on sunny slope decreased with the increasing height of slope position and a significant linear correlation(P≤0.05) existed between them after rain.Additionally,the average daily amount of soil condensation water on shady slope was 0.310 mm,which was more than that on sunny slope(0.259 mm)and the amount was the least on the top of slope(0.151 mm)after rain.The amount of daily condensation water on each slope position increased during the first 3 days after rain and the maximum value achieved on the third days,which then reduced gradually until stabilization.The results of this research can provide theoretical basis for soil water balance calculation and water resource evaluation in the Mu Us Desert,and also can play an important role in the ecological recovery of this area.
中文关键词	沙丘 ; 坡位 ; 凝结水 ; 降雨 ; 高度
英文关键词	dune slope position condensation water rain height
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:5776195
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234977
作者单位	1.北京林业大学水土保持学院, 北京 100083, 中国; 2.寿光市文家街道办事处农业综合服务站, 寿光, 山东 262702, 中国
推荐引用方式 GB/T 7714	郭冰寒,王若水,肖辉杰,等. 毛乌素沙地微地形对土壤凝结水分布的影响[J]. 北京林业大学,2016,30(4):102-109.
APA	郭冰寒,王若水,肖辉杰,郎晓辉,郭玉静,&刘涛.(2016).毛乌素沙地微地形对土壤凝结水分布的影响.水土保持学报,30(4),102-109.
MLA	郭冰寒,et al."毛乌素沙地微地形对土壤凝结水分布的影响".水土保持学报 30.4(2016):102-109.