中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 砂姜黑土的水分特性及其与土壤易旱的关系 土壤学报 1993 (4) 423-431
Position: Home > Articles > MOISTURE CHARACTERS OF CALCIC CONCRETION BLACK SOIL AND THEIR RELATIONSHIP WITH SOIL DROUGHT Acta Pedologica Sinica 1993 (4) 423-431

砂姜黑土的水分特性及其与土壤易旱的关系

作  者：
孙怀文
单  位：
安徽省水利科学研究所
关键词：
砂姜黑土;水分特性;供水;保水;易旱
摘  要：
本文通过实验对砂姜黑土的水分特性及其与土壤易旱的关系进行了分析研究。结果表明:砂姜黑土持水性能较差,有效水分不仅含量较低,而且低吸力段所占比重较小;比水容量随吸力增大而急剧减少,在10—30kPa时即已减小到10~(-7)数量级(ml/g·Pa)。土壤导水性能弱,土壤吸力>30kPa后水分移动极其缓慢。说明土壤的供水容量和供水强度均较小,不利于对作物的及时供水。土壤毛管水上升速度缓慢,上升高度小,不利于作物对地下水的利用。土壤上部土层蒸发强度大,不利于保水;下部土层毛管性能微弱,水分运行缓慢,虽有利于保水,但不能及时补充根层所需的作物供水。这些特性综合反映了砂姜黑土的抗旱性较弱,是土壤易旱的主要原因。
译  名：
MOISTURE CHARACTERS OF CALCIC CONCRETION BLACK SOIL AND THEIR RELATIONSHIP WITH SOIL DROUGHT
作  者：
Sun Huaiwen (Anhui Water Resources Research Institute, 233000)
关键词：
Calcic concretion black soil;;Moisture characters;;Water supply;;Water conservation;;Soil drought.
摘  要：
A study on the characters of water retention, hydroconductibility, capillary rise and evaporation of calcic concretion black soil and their relationship with soil drought was carried out. The results obtained are summarized as follows:The water retention ability of calcic concretion black soli was poor because the available water was not only low in the capacity but also smaller in the proportion at low suction range; and with the increase in soil suction the specific water capacity was sharply decreased and it had already reduced to 10~(-7) ml/g·Pa at soil suction 10—30 kPa. The soil hydroconductibility property was poor and the movement of the water was very slow at soil suction >30 kPa. These showed that both the capacity and rate of water supply in the soil were unfavorable to the water supply for crops. The rate and height of capiliary water rise were low, being disadvantageous to the use of the groundwater for crops. The soil water was evaporated more quickly in the upper horizon of the soil, and the water of the lower horizon moved up very slow and can't complement timely the deficit of water in root horizon. The above-mentioned characters showed that the drought resistance of calcic concretion black soil was weak, which should be the main reason for the drought of the soil.

相似文章

导出引用
计量
文章访问数: 9
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46