干旱区生态环境知识资源中心(Arid): 半干旱区海水灌溉农田土壤盐分运移规律的研究

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	半干旱区海水灌溉农田土壤盐分运移规律的研究
其他题名	Study on Salinity Migration in Plough Layer Soil Irrigated by Seawater in Semi-arid Region
	唐奇志; 刘兆普
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2004
卷号	18 期号:1 页码:47-50
中文摘要	对在海侵灾害最严重的莱州湾地区,在油葵生育期内利用不同浓度的海水直接灌溉两次,研究0～40 cm土层土壤盐分及Na~+、Cl~-、Ca~(2+)、Mg~(2+)、K~+含量的分布、迁移规律,为确定合适的灌溉定额和灌溉次数提供最基础的技术参数.结果表明:①60%以上浓度海水灌溉,5～40 cm土层土壤盐分呈积累趋势,次生盐渍化明显;40%海水灌溉后轻微积盐,若无充沛的雨水淋洗,则须结合一定的农业措施以防造成次生盐害;20%海水浓度在灌溉定额为800 m3/hm2时能保持土壤盐分的盈亏平衡.②Na~+和Cl~-主要分布在5～20 cm土层,而Ca~(2+)和Mg~(2+)主要在20～40 cm土层,K~+则极易被淋洗而迁移到40 cm以下土层.③0～5 cm土层盐分变化剧烈,在油葵整个生育期降雨量为171.7 mm的情况下,至收获期时,各处理均能降至灌海水前的水平.
英文摘要	In the region of Laizhou gulf where disaster of marine invasion is very serious > distribution and migra-tion of salinity and Na~+,Cl~-,Ca~(2+),Mg~(2+),K~+ in 0-40 cm soil irrigated by seawater were investigated, to attain the most fitting irrigation requirement. The results were showed as follows; ①Salinity was accumulated conspicu-ous in O-40cm soil layer and brought on secondary salinization when the seawater irrigation was excess by 60%} "Wtien by 40% concentration , slight content of salinity would be residued and some agricultural measures must be afforded to stand off secondary salinization if no enough rainfall. There was a significant change of salinity in plough, layer soil when irrigated by 20% seawater. ②Na~+ and Cl~ were primarily distributed in 5-40 cm soil layer, and Ca~(2+) and Mg~(2+) in 5--40 cm. For the K~+ , however, was liable to be leached under the 40 cm soil layer. ③Though content of salinity in 0-5 cm layer changed drastically, it could decreased to the control level when Htslianthus annuush. was harvested , in spite of only 171. 7 mm rainfall emergence.
中文关键词	海水灌溉 ; 海水入侵 ; 农田土壤 ; 水盐运动
英文关键词	seawater irrigation marine invasion plough layer soil migration of salinity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURAL ENGINEERING ; AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:1508972
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/205471
作者单位	南京农业大学资源与环境科学学院, 南京, 江苏 210095, 中国
推荐引用方式 GB/T 7714	唐奇志,刘兆普. 半干旱区海水灌溉农田土壤盐分运移规律的研究[J],2004,18(1):47-50.
APA	唐奇志,&刘兆普.(2004).半干旱区海水灌溉农田土壤盐分运移规律的研究.水土保持学报,18(1),47-50.
MLA	唐奇志,et al."半干旱区海水灌溉农田土壤盐分运移规律的研究".水土保持学报 18.1(2004):47-50.