[1]金建新,桂林国,尹志荣,等.宁夏典型土壤持水性能及收缩特征[J].水土保持研究,2017,24(04):279-283.
　JIN Jianxin,GUI Linguo,YIN Zhirong,et al.Soil Moisture Curve and Shrinkage Characteristic of Different Areas in Ningxia[J].Research of Soil and Water Conservation,2017,24(04):279-283.
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宁夏典型土壤持水性能及收缩特征

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 24 期数: 2017年04期 页码: 279-283 栏目: 出版日期: 2017-08-28
Title:
Soil Moisture Curve and Shrinkage Characteristic of Different Areas in Ningxia
作者:
金建新, 桂林国, 尹志荣, 何进勤, 雷金银
宁夏农林科学院 农业资源与环境研究所, 银川 750002
Author(s):
JIN Jianxin, GUI Linguo, YIN Zhirong, HE Jinqin, LEI Jinyin
Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and Forestry, Yinchuan 750002, China
关键词:
脱水; 土壤水分特征曲线; 收缩; 比容积
Keywords:
dehydration; soil moisture characteristic curve; contraction; specific volume
分类号:
S152.7
摘要:
为了探明宁夏不同生态区域土壤在脱水过程中的收缩特性，选择六盘山（LP）、贺兰县（HL）、同心县（TX）和盐池县（YC）四地的土壤对其脱水过程中的土壤水分特征曲线进行测定，并对其比容积、容重等参数进行了研究。结果表明：V-G模型对4种土壤水分特征曲线的拟合均具有较高的精度，土壤有效收缩度相对大小依次为HL > TX > YC > LP，收缩最大的为黏土，在吸力值在400 cm时HL有效收缩度为0.23。脱水过程中比容积曲线表现为LP曲线比较平缓，其余三种土壤跳跃性比较大。脱水后容重相对大小为LP > TX > YC > HL，这与土壤各颗粒级配组成密切相关。
Abstract:
In order to understand soil shrinkage characteristics in the dewatering process in the different ecological regions of Ningxia, soil samples in Liupan Mountain (LP), Helan County (HL), Tongxin County (TX) and Yanchi County (YC) were collected. Dehydration the process of soil moisture characteristic curves and soil specific volumes, bulk densities and other parameters were measured. The results show that VG model can precisely describe the soil moisture curves, effective soil shrinkage of the relative size decreases in the order: HL > TX > YC > LP, the contraction of clay soil is the largest, when the suction value is 400 cm, the effective degree of shrinkage of HL is 0.23. Performance of a specific volume curve of LP is relatively gentle during dehydration, the fluctuation of the curves of the other three soils is relatively large. Relative bulk densities decrease in the order: LP > TX > YC > HL after dehydration, which is closely related to particle size distribution of each soil.

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备注/Memo

收稿日期:2016-04-15;改回日期:2016-05-25。
基金项目:“十二五”国家科技支撑计划课题（2014BAD14B006）；宁夏回族自治区自然科学基金（NZ15127）
通讯作者:桂林国(1963-),男,宁夏中宁人,研究员,主要从事土壤快速培肥和农业节水研究工作。E-mail:guilinguo2002@163.com

更新日期/Last Update: 1900-01-01