干旱区生态环境知识资源中心(Arid): 典型绿洲灌区长期膜下滴灌棉田根区土壤盐分及离子变化特征

Arid

	典型绿洲灌区长期膜下滴灌棉田根区土壤盐分及离子变化特征
其他题名	Variation Characteristics of Soil Salinity and Ion in Root Zone by Long-term Drip Irrigation Under Mulch in Typical Oasis Irrigation Area
	王振华 1; 杨培岭 2; 郑旭荣 3; 何新林 3; 张金珠 4; 李朝阳 5; 李文昊 4
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2014
卷号	28 期号:3 页码:158-165
中文摘要	通过对新疆典型灌区5块（1998地块、2002地块、2004地块、2006地块和2008地块）不同膜下滴灌应用年限农田进行连续4年的定点监测，每块地每月分别在膜内毛管处、棉花窄行中点、膜外两膜中点3个位置取样测试从地表向下060 cm深处土样的盐分及离子含量，揭示长期膜下滴灌农田根区土壤盐分演变趋势。结果表明，在现行灌溉制度条件下，根区土壤盐分平均值、最大值、盐分方差和标准差均随膜下滴灌应用年限延长呈降低趋势，根区盐分平均值与膜下滴灌应用年限符合Allometricl指数函数模型，滴灌应用1~3年，相对荒地脱盐率可达85%左右，滴灌应用3～10年盐分降低趋势明显，滴灌10~15年相对荒地脱盐率稳定在95%左右。根区土壤盐分中Na~+与Cl~- 2种离子含量随膜下滴灌年限延长而降低趋势明显，滴灌5年以后降低缓慢，年均含量低于0. 15 g/kg，脱盐率稳定在80%~90%之间，滴灌8~15年相对稳定；根区盐分离子组分中主要是Na~+与Cl~-，随滴灌应用年限延长而降低，其次是Ca~(2+)、SO_4~(2-)、Mg~(2+)3种离子，其他离子含量随滴灌应用年限延长无明显变化特征。根区盐分及离子降低的主要原因在于当地的灌溉制度，坚持现行的灌水制度虽然有利于膜下滴灌长期可持续应用，但应适当减少花铃后期及吐絮期的灌水定额以节约水资源。
英文摘要	To explore the variation characteristics of soil salinity and ion in root zone by long-term drip irrigation under mulch in typical oasis irrigation area, five pieces of farmland with different drip irrigation application years（1998, 2002,2004,2006 and 2008) were fixed point monitored for four consecutive years in typical irrigation area of Xinjiang. The contents of soil salinity and ion were monitored in capillary of inner membrane,narrow line midpoint of cotton and the midpoint of inner-outer membrane every month. Soil samples were collected in 0 60 cm soil layer. The results showed that in the current irrigation system condition, the average value, maximum value,variance and standard deviation of soil salinity in root zone decreased with increasing drip irrigation application years. The average of soil salinity in root zone was Allometricl exponential function model of drip irrigation application years. Compared with uncultivated land, the desaltation rate reached about 85% for 1~3 yeas, the soil salinity decreased obviously for 3~10 years，and the desaltation rate stabilized about 95 % for 10~15 years. Na~+ and Cl~- of soil salinity in root zone decreased obviously with increasing drip irrigation application years, but after 5 years, it became low, the average content was lower than 0. 15 g/kg, the desaltation rate stabilized between 80%~90%,it was relative stable for 8~15 years. Soil salinity ion composition in root zone was mainly Na~+ and Cl~-,and those decreased with drip irrigation application years, then the Ca~(2+),SO_4~(2-),Mg~(2+) ions. There was no obvious variation between other ions and drip irrigation application years. The main reason of decreasing the soil salinity and ion in root zone was the local irrigation system, adhering to the current system of irrigation was beneficial to sustainable use of long-term drip irrigation under mulch, but should be appropriate reduction in flowering stage and boll opening stage irrigation to save water resource.
中文关键词	绿洲 ; 长期膜下滴灌 ; 根区盐分 ; 离子 ; 棉田
英文关键词	oasis long-term drip irrigation under mulch soil salinity in root zone ion cotton field
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:5171091
来源机构	石河子大学 ; 中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231766
作者单位	1.中国农业大学水利与土木工程学院, 现代节水灌溉兵团重点实验室, 北京 100083, 中国; 2.中国农业大学水利与土木工程学院, 北京 100083, 中国; 3.石河子大学水利建筑工程学院, 现代节水灌溉兵团重点实验室, 石河子, 新疆 832003, 中国; 4.石河子大学水利建筑工程学院, 石河子, 新疆 832003, 中国; 5.现代节水灌溉兵团重点实验室, 现代节水灌溉兵团重点实验室, 石河子, 新疆 832003, 中国
推荐引用方式 GB/T 7714	王振华,杨培岭,郑旭荣,等. 典型绿洲灌区长期膜下滴灌棉田根区土壤盐分及离子变化特征[J]. 石河子大学, 中国农业大学,2014,28(3):158-165.
APA	王振华.,杨培岭.,郑旭荣.,何新林.,张金珠.,...&李文昊.(2014).典型绿洲灌区长期膜下滴灌棉田根区土壤盐分及离子变化特征.水土保持学报,28(3),158-165.
MLA	王振华,et al."典型绿洲灌区长期膜下滴灌棉田根区土壤盐分及离子变化特征".水土保持学报 28.3(2014):158-165.