期刊文献+

砒砂岩风化物对土壤水分特征曲线及蒸发的影响 预览 被引量:12

EFFECTS OF AMENDMENT OF AEOLIAN SANDY SOIL AND LOESS WITH SOFT SANDSTONE ON SOIL WATER RETENTION CURVE AND EVAPORATION
在线阅读 下载PDF
收藏 分享 导出
摘要 运用高速离心机法和室内模拟蒸发的方法,对比研究了红色(RS)、灰色(GS)和白色(WS)三种颜色砒砂岩风化物在不同添加比例条件下对沙黄土和风沙土水分特征曲线、供水能力和干旱过程中失水过程的影响。研究表明:砒砂岩风化物的添加对沙黄土和风沙土水分特征曲线有较明显的影响。砒砂岩风化物的持水能力均高于沙黄土和风沙土,砒砂岩风化物添加提高了风沙土和沙黄土的持水能力,降低了沙黄土和风沙土失水速率;较低比例的砒砂岩风化物提高了沙黄土和风沙土的比水容量,但对风沙土和沙黄土低吸力段供水能力的提高作用并不明显。整个蒸发期间,砒砂岩风化物降低了沙黄土的标准蒸发量,而对于风沙土,其作用是蒸发前期降低,中后期增加。红色、灰色、白色三种砒砂岩风化物分别使风沙土的蒸发失水比提高了11.59%、10.14%和0.01%,添加三种砒砂岩风化物后的处理的最终平均含水量分别是风沙土的4倍、2.33倍、1.33倍,使沙黄土的蒸发失水比降低了13.33%、13.33%、29.52%,最终含水量降低了45.83%、54.17%、66.67%。因此,从提高土壤持水能力方面考虑,砒砂岩可以用于当地矿区和排土场区土壤改良,以促进生态修复。 "Pisha" or soft sandstone, distributed extensively in the region striding over Shanxi Province, Shaanxi Province and Inner Mongolia Autonomous Region, is a kind of sandstone, highly erodible and unfit for vegetation growth. It is also one of the major sources of coarse sediment in the Yellow River. As it contains abundant montmorillonite, this kind of soft sandstone is quite high in water holding capacity. An indoor simulation experiment was carried out on feasibili- ty of using weathered soft sandstone to ameliorate the local soils ( Aeolian sandy soil and sandy loess, rather coarse in soil texture) in water holding capacity. The experiment used 3 types of soft sandstones different in color ( red, gray and white) in amendment in the ratio of 1 : 9, 3:7 and 1 : 1 ( by weight) separately, to determine effects of the amendment on water re- tention curve and evaporation process of the local soils. The experiment was conducted in the State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, In- stitute of Water and Soil Conservation, Chinese Acdemy of Sciences. Three kinds of soft sandstones ( Red, Grey, White sandstone) were mixed with aeolian sandy soil and sandy loess, separately, in line with the designed ratios, 1 : 9, 3:7 and 1 : 1 (by weight of air-dried soil, m soft sandstone /m soil) , and each had 3 replicates. Original soils were also tested as control. The experiment proceeded under natural conditions. A centrifuger was used to determine soil water retention curve at 12 set rotation rates and the RETC software and van Genuchten model was used to fit the soil water retention curve, and soil evaporation processes were determined through in-lab simulation, using a hard plastic beaker with punched bottom. Before packing soil into the beaker a piece of filter paper was placed on the bottom to prevent the soil from leaking. The beaker was put into a pan with water to wet the soil in a self-suction way through the holes in the bottom for 12 h till the surface
作者 张磊 齐瑞鹏 张应龙 郑纪勇 张兴昌 Zhang Lei Qi Ruipeng Zhang Yinglong Zheng Jiyong Zhang Xingchang ( 1 College of Natural Resources and Environment, Northwest A&F University, Yungling, Shaanxi 712100, China) (2 State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Water and Soil Conservation Chinese Academy of Sciences & Ministry of Water Resources, Yangling, Shaanxi 712100, China ) (3 Yulin Desert King Biological Technology Co. , Ltd, Yulin, Shaanxi 719300, China)
出处 《土壤学报》 CAS CSCD 北大核心 2015年第1期77-86,共10页 Acta Pedologica Sinica
基金 中国科学院西部行动计划项目(KZCX2-XB3-13)、科技部科技惠民计划项目(2012GS610203)资助
关键词 砒砂岩 水分特征曲线 供水能力 蒸发 Soft sandstone Soil water retention curve Water supply capacity Evaporation
作者简介 张磊(1988-),男,新疆昌吉人,硕士研究生,主要从事土壤水分运动方面研究。E-mail:zhanglei.ted@hotmail.com 通讯作者,郑纪勇(1974-),男,山东聊城人,博士,副研究员,主要从事农田生态系统物质迁移方面的研究。E-mail:zhjy@ms.iswc.ac.cn
  • 相关文献

参考文献23

二级参考文献169

共引文献317

同被引文献222

引证文献12

二级引证文献38

投稿分析

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈