干旱区生态环境知识资源中心(Arid): 内陆干旱区不同灌溉制度对盐碱地滴灌土壤盐分离子分布的影响

Arid

	内陆干旱区不同灌溉制度对盐碱地滴灌土壤盐分离子分布的影响
其他题名	Effect of Different Irrigation Regimes on the Distribution of Soil Salt under Drip Irrigation on Saline and Alkaline Soil in Inland and Arid Region
	王若水; 康跃虎; 万书勤; 胡伟; 刘士平
来源期刊	土壤通报
ISSN	0564-3945
出版年	2013
卷号	44 期号:3 页码:567-574
中文摘要	通过田间试验研究覆膜滴灌条件下不同灌溉制度对土壤盐分分布的影响。试验通过控制滴头正下方20cm处的土壤基质势下限进行灌溉,共设5个水平的土壤基质势处理:-5 kPa (S1)、-10 kPa (S2)、-15 kPa(S3)、-20 kPa (S4)和-25 kPa(S5),每个处理重复3次,按随机区组布置。结果表明:不同土壤基质势控制对盐渍土中盐分分布有显著影响,不同土壤盐分离子的分布各不相同。其中Na~+与Cl~-容易被淋洗,两个生长季后,各处理土壤中Na~+与Cl~-含量有显著降低,并且土壤基质势控制越高淋洗效果越好。SO_4~(2-)与HCO_3~-的淋洗效果主要受离子浓度影响,第一年淋洗效果较第二年明显。Mg~(2+)与Ca~(2+)不易随水移动,各处理无明显差异。经过两个生长季的灌溉淋洗,各处理土壤SAR值与全盐含量均有显著降低,根区内SAR值与全盐含量的降低幅度均在50%以上。研究结果对内陆干旱区盐碱地水盐调控和灌溉制度的制定具有理论意义和应用价值。
英文摘要	Field experiment was conducted to investigate the effect of different irrigation regimes on the distribution of soil salt under mulch drip irrigation on saline and alkaline soil in inland and arid regions. The experiment included five treatments, in which controlled the soil matric potential (SMP) higher than-5 kPa (S1), -10 kPa (S2), -15 kPa (S3), -20 kPa (S4) and -25 kPa (S5), respectively, at 20 cm depth immediately under emitter. All treatments were repeated three times with the experimental plots following a complete randomized block design. Results showed that there was a significant effect of SMP threshold on the soil salt distribution and the different salt ions had the different characteristics of movement and distribution under mulch drip irrigation. Na~+ and Cl~- are easy to be leached and the content of which decreases considerably in the soil after two growing seasons. The average contents of Na~+ and Cl~- in the soil profile decreased with the increasing SMP threshold. SO_4~(2-) and HCO_3~- contents in the soil were influenced by their concentration in the soil and there were more considerable differences among the five treatments for these two ions in the first year than those in the second year. Since it’s hard for Mg~(2+) and Ca~(2+) to move with water, there was no significant difference among the five treatments on the distribution of these two ions. The SAR and TDS values in the soil decreased considerably and the decreasing rate of the two values in root-zone were all above 50% for each treatment.
中文关键词	盐碱地 ; 内陆干旱区 ; 滴灌 ; 盐分分布
英文关键词	Saline-sodic soil Inland and arid region Drip irrigation Salt distribution
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURAL ENGINEERING
WOS研究方向	Agriculture
CSCD记录号	CSCD:4849239
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230244
作者单位	中国科学院地理科学与资源研究所, 中国科学院陆地水循环及地表过程重点实验室, 北京 100101, 中国
推荐引用方式 GB/T 7714	王若水,康跃虎,万书勤,等. 内陆干旱区不同灌溉制度对盐碱地滴灌土壤盐分离子分布的影响[J]. 中国科学院地理科学与资源研究所,2013,44(3):567-574.
APA	王若水,康跃虎,万书勤,胡伟,&刘士平.(2013).内陆干旱区不同灌溉制度对盐碱地滴灌土壤盐分离子分布的影响.土壤通报,44(3),567-574.
MLA	王若水,et al."内陆干旱区不同灌溉制度对盐碱地滴灌土壤盐分离子分布的影响".土壤通报 44.3(2013):567-574.