干旱区生态环境知识资源中心(Arid): 咸水滴灌条件下塔里木沙漠公路防护林土壤水分物理性质

Arid

	咸水滴灌条件下塔里木沙漠公路防护林土壤水分物理性质
其他题名	The Soil Water Physical Properties in the Tarim Desert Highway Shelterbelt Under Saline Water Drip-irrigation
	丁新原 1; 张广宇 2; 周智彬 1; 王永东 1; 鲁晶晶 1; 黎小娟 1
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2015
卷号	29 期号:1 页码:250-256
中文摘要	应用压力膜仪测定了塔里木沙漠公路防护林地0-150 cm土层范围内的土壤水分特征曲线,并用RETC软件中的van Genuchten模型对其进行拟合分析,研究了防护林地不同土层的土壤水分物理特性。结果表明:(1)van Genuchten模型拟合的含水量模拟值与实测值间的RMSE≤0.01。(2)各土层持水性强弱依次为0-5 cm>40-60 cm>100-150 cm>60-100 cm>5-40 cm;供水性表现为5-40 cm>60-100 cm>0-5 cm>40-60 cm>100-150 cm,且整体在低于1.510~5 Pa吸力值时表现较强;各土层有效水含量自上而下递减,均值为17.286%。(3)饱和持水量、毛管持水量和田间持水量也随土层自上而下呈同步下降趋势,并与容重呈显著的一元线性负相关。(4)有效水范围内,防护林地土壤有效水上限对应0.310~5 Pa的吸力值,易效水与难效水的临界点吸力值以1.5*10~5 Pa为宜;各土层的易效水均多于难效水,总体上,前者均值为13.127%,是后者的3倍;5-40 cm和60-100 cm土层的易效水多,0-5 cm和40-60 cm土层的难效水多,二者比例均为同类最高;同层内易效水比例与土壤持水性之间负对应。
英文摘要	The soil water characteristic curves for different depths from 0 cm to 150 cm of the soil profiles in Tarim desert highway shelterbelt were measured by Pressure Membrane Apparatus and fitted by van Genuchten,then the soil physical water properties for different depths were analyzed and revealed.The results showed as follows:(1)It was significant to imitate the soil water characteristic curves for different depths in this study area with the help of van Genuchten Model,because all the results of RMSE between simulated values and measured values of soil water content had reached remarkable levels which were not more than 0.01.(2)From strong to weak,the capacity of soil water retention for different depths were followed respectively by 0-5 cm,40-60 cm,100-150 cm,60-100 cm,5-40 cm while the soil water supply were followed respectively by 5-40 cm,60-100 cm,0-5 cm,40-60 cm,100-150 cm,and it took on a strong water supply under the soil suction on Pressure which was less than 1.5105 Pa.The available moisture content of soil was decreased gradually from the upper depth to the lower depth and its average was 17.286%.(3)Saturated moisture capacity,capillary moisture capacity and field moisture capacity were also showed a synchronized decreasing trend from the upper depth to the lower depth;on the other hand,the relationship was closed between three kinds of soil moisture holding-capacity and soil bulk,which was consistent with one-linear regression function.(4)The upper limit of available water was the soil moisture content corresponding to the suction of 0.310~5 Pa and it was suitable to take 1.5*10~5 Pa as the boundary point of suction for readily available water and resistant available water.The readily available water content in all the depths were more than the resistant available water content,and the value of former was 13.127%,which was three times of the latter.Compared with the others,the readily available water content in the depths of 5-40 cm and 60-100 cm took the most supreme proportion while the resistant available water content in the depths of 5-40 cm and 60-100 cm took the highest proportion in the range of available soil water content, and both the values of them were the biggest.Besides,the bigger the proportion of readily available water content,the weaker the capacity of soil water retention in the same depth.
中文关键词	土壤水分特征曲线 ; 压力膜仪 ; 土壤水分物理性质 ; 比水容量 ; 塔里木沙漠公路防护林
英文关键词	soil water characteristic curve pressure membrane apparatus soil water physical properties soil water capacities Tarim desert highway shelterbelt
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5359494
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233345
作者单位	1.中国科学院新疆生态与地理研究所, 荒漠与绿洲生态国家重点实验室, 乌鲁木齐, 新疆 830011, 中国; 2.内蒙古自治区重大项目办, 呼和浩特, 内蒙古 010000, 中国
推荐引用方式 GB/T 7714	丁新原,张广宇,周智彬,等. 咸水滴灌条件下塔里木沙漠公路防护林土壤水分物理性质[J]. 中国科学院新疆生态与地理研究所,2015,29(1):250-256.
APA	丁新原,张广宇,周智彬,王永东,鲁晶晶,&黎小娟.(2015).咸水滴灌条件下塔里木沙漠公路防护林土壤水分物理性质.水土保持学报,29(1),250-256.
MLA	丁新原,et al."咸水滴灌条件下塔里木沙漠公路防护林土壤水分物理性质".水土保持学报 29.1(2015):250-256.