干旱区生态环境知识资源中心(Arid): 覆砂条件下保水剂对土壤水分蒸发影响的研究

Arid

	覆砂条件下保水剂对土壤水分蒸发影响的研究
其他题名	Effects of water retaining agent application on evaporation from soils covered with gravel
	赵文举 1; 豆品鑫 1; 马孝义 2; 马宏 1; 郁文 1
来源期刊	农业现代化研究
ISSN	1000-0275
出版年	2016
卷号	37 期号:1 页码:182-186
中文摘要	覆砂条件下,保水剂具有更明显的抑制蒸发和提高土壤保水能力的作用。本文采用室外蒸发桶模拟实验,研究了在覆砂与不覆砂条件下,三种浓度保水剂对砂壤土水分蒸发的影响。结果表明:在无覆砂条件下,浓度为0.1%、0.2%、0.5% 保水剂的累积蒸发量较裸土分别减少5.70%、20.20%、25.65%,说明加入保水剂后可明显减少土壤水分蒸发,浓度越大抑制蒸发效果越明显;在覆砂条件下,未加保水剂的土壤累积蒸发量较裸土减少了87.08%,当分别加入保水剂浓度为0.1%、0.2% 和0.5% 时,土壤水分累积蒸发量较裸土分别减少了90.47%、96.20%、96.32%,在覆砂条件下,保水剂浓度由0.2% 增加到0.5% 时,抑制水分蒸发的效果增加不明显,得出保水剂浓度为0.2% 时,在三种保水剂浓度之间最为经济合理,说明覆砂+ 保水剂模式具有良好的节水效果,且累积蒸发量与时间的关系符合对数关系,该研究结果为西北旱区生态农业的可持续发展提供理论指导。
英文摘要	Water retaining agent is significant in inhibiting evaporation and enhancing soil water retention. This study aimed to investigate the impact of soil water retaining agent on evaporation from soils covered with gravel by using outdoor evaporation simulation experiments. For this purpose, treatments with three different concentrations (0.1%, 0.2%, and 0.5%) of water retaining agent and two soil covers (gravel and no gravel) were applied. The results showed that accumulated soil evaporation decreased by 5.70%, 20.20%, and 25.65%, respectively, for treatments with water retaining agent concentrations of 0.1%, 0.2%, and 0.5% compared with no gravel cover treatment. This indicated that water retaining agent decreased evaporation and this effect was stronger for higher concentration of water retaining agent. In the gravel-mulched field without soil water retention agent, cumulative evaporation decreased by 87.08% compared with bare soil. When water retaining agent was added at the concentration of 0.1%, 0.2%, and 0.5%, the cumulative evaporation were reduced by 90.47%, 96.32%, and 96.20%, respectively, compared with bare soil. Because the effect of inhibiting evaporation did not change when the concentration of water retention agent increased from 0.2% and 0.5%, the suitable concentration of water retaining agent concentration could be 0.2%. This study indicated that sand + water retaining agent model has a good water-saving effect, the relationship between the cumulative evaporation and time could be fitted well by the logarithmic function. This experiment provided theoretical foundation for sustainable development of gravel-sand mulched ecological agriculture in north-western arid area.
中文关键词	土壤水分 ; 累积蒸发量 ; 覆砂 ; 保水剂 ; 浓度
英文关键词	soil moisture cumulative evaporation gravel-mulched field water retaining agent concentration
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:5622893
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234675
作者单位	1.兰州理工大学能源与动力工程学院, 兰州, 甘肃 730050, 中国; 2.西北农林科技大学, 旱区农业水土工程教育部重点实验室, 杨凌, 陕西 712100, 中国
推荐引用方式 GB/T 7714	赵文举,豆品鑫,马孝义,等. 覆砂条件下保水剂对土壤水分蒸发影响的研究[J]. 西北农林科技大学,2016,37(1):182-186.
APA	赵文举,豆品鑫,马孝义,马宏,&郁文.(2016).覆砂条件下保水剂对土壤水分蒸发影响的研究.农业现代化研究,37(1),182-186.
MLA	赵文举,et al."覆砂条件下保水剂对土壤水分蒸发影响的研究".农业现代化研究 37.1(2016):182-186.