摘要
【目的】探讨绿洲土壤剖面盐分特征及土壤剖面盐分含量随季节变化的关系.为土壤开发利用和土壤盐渍化防治提供理论研究基础.【方法】以博斯腾湖西岸湖滨绿洲为研究区,采用地统计学方法和冗余分析方法,探讨研究区土壤盐分含量的季节变化特征.【结果】夏季的土壤盐分含量为3.02 g/kg,比春季、秋季的土壤盐分含量分别高199.01%、143.55%;春季、夏季的土壤盐分含量的变异系数随着土壤剖面深度的增加,变异系数分别增加3.11%、5.91%,而秋季的土壤盐分含量的变异系数则相反,变化幅度较大,变异系数减少21.77%;Na++K+分别占春季、夏季、秋季的主要土壤盐分离子总量的45.10%、44.80%、44.70%,是研究区的主要土壤盐分离子;春季、夏季、秋季的土壤盐分结构性因子分别为99.97%、98.39%、77.37%,均大于75.00%,表现为强空间相关性.【结论】研究区土壤盐分在春季、夏季、秋季均呈表聚型,且夏季的土壤盐分含量高于春季、秋季的土壤盐分含量;春季、夏季、秋季的土壤盐分含量与主要土壤盐分离子Na++K+、Cl-、Mg 2+呈极显著正相关(P<0.01);春季、夏季、秋季的土壤盐分含量高值区主要集中在研究区中部东北部.
【Objective】To study the salinity characteristics of the oasis soil profile and the relationship between the salt content of the soil profile with the seasons,providing a theoretical basis for soil development and utilization and soil sanity control.【Method】Taking the oasis on the west coast of Bosten Lake as the study area,the seasonal variation characteristics of soil salt content in the study area were analyzed by geostatistics and redundant analysis methods.【Result】The soil salt content in summer was 3.02 g/kg,which was 199.01%and 143.55%higher than that in spring and autumn respectively.The variation coefficient of salt content in spring and summer increased by 3.11%and 5.91%respectively with the increase of profile,while in autumn,the variation coefficient decreased by 21.77%.Na++K+accounted for 45.10%,44.80%and 44.70%of the total salt ions in three different seasons,which was the main salt ion in the study area.The structural factors of salt content in spring and summer were 99.97%and 98.39%,respectively.The structural factors in autumn were 22.60%and 21.02%lower than that in spring and summer,and were more than 75%in three different seasons,all showing strong spatial correlation.【Conclusion】Soil salt content in the study area was supernumerary in spring,summer and autumn,and the content of soil salt in summer was higher than that in spring and autumn.Soil salt content in spring,summer and autumn was significantly positively correlated with main soil salt ions Na++K+、Cl-、Mg 2+(P<0.01).The high soil salt content in spring,summer and autumn was mainly in the middle and northeast of the study area.
作者
赵慧
李新国
毛东雷
麦麦提吐尔逊·艾则孜
ZHAO Hui;LI Xin-guo;MAO Dong-lei;Mamattursun·Eziz(College of Geographic Sciences and Tourism,Xinjiang Normal University,Xinjiang Laboratory of Lake Environment and Resources in Arid Zone,Urumqi 830054,China)
出处
《甘肃农业大学学报》
CAS
CSCD
北大核心
2019年第6期155-162,共8页
Journal of Gansu Agricultural University
基金
国家自然科学基金项目(41661047,41561073)
关键词
土壤盐分特征
季节变化
土壤剖面
冗余分析
湖滨绿洲
soil salinity characteristics
seasonal variation
soil profile
redundancy analysis
lakeside oasis
