河南农业科学Issue(8)：55-59,5.DOI:10.15933/j.cnki.1004-3268.2015.08.012
渭干河-库车河三角洲绿洲农田表层土壤盐分特征分析
Salinity Characteristics of Farmland Surface Soil in Weigan-Kuqa River Delta Oasis
摘要
Abstract
Combining field sampling with laboratory experiments,farmland surface soil salt content from different land use types were analyzed in Weigan-Kuqa river delta oasis. The results showed that total soil salt content was 3. 43 g/kg,belonging to mild salinization,the cotton field had the highest value of 5. 28 g/kg,the grain field had the lowest value of 1. 60 g/kg;the soil was slightly alkaline. SO2-4 had the largest portion among all salt ions,surface soil consisted mainly of sulfates saline soil. Among anions,SO2-4 had the largest portion,the fruit trees field had the highest value,and the cotton field had the lowest value;among cations,the portion of K+ +Na+were the largest,the mixed crop field had the highest value,and the cotton field had the lowest value. There was a extremely significant positive correlation between farmland total salt content and Ca2+content,significant positive correlation between Mg2+content and pH value,extremely significant positive correlation between Mg2+ content and Cl- content, and significant negative correlation between Mg2+content and HCO3-content. There was a extremely significant positive correlation between surface soil total salt content and Ca2+ content, extremely significant positive correlation between Mg2+content and Cl-content in cotton field. The total surface soil salt content were extremely significant positively correlated with K+ + Na+ content, SO2-4 content, extremely significant negatively correlated with Cl-content, and significantly positively correlated with pH value;there was a extremely significant positive correlation between Ca2+ content and Mg2+ content, significant positive correlation between SO2-4 content and pH value, extremely significant positive correlation between SO2-4 content and K+ +Na+content, and significant negative correlation between SO2-4 content and Cl-content;Cl-content was extremely significant negatively correlated with K+ +Na+content and pH value in cereal field,mixed crops field and fruit field. The total salt content in surface soil gradually increased spatially from the interior oasis to the periphery and its fan edges. The soil with no salinization and mild salinization were mainly distributed in the central and northeast part of oasis, the soil with moderate salinization mainly distributed in the northern region of the oasis,and the soil with severe salinization was mainly distributed in the western,periphery and the fan edges of the delta oasis.关键词
盐分离子/农田利用类型/表层土壤/渭干河-库车河三角洲绿洲Key words
salt ions/farmland land use types/surface soil/Weigan-Kuqa river delta oasis分类
农业科技引用本文复制引用
艾萨迪拉·玉苏甫,满苏尔·沙比提,阿依图尔荪·哈力穆拉提..渭干河-库车河三角洲绿洲农田表层土壤盐分特征分析[J].河南农业科学,2015,(8):55-59,5.基金项目
国家自然科学基金项目(41261056,31260048) （41261056,31260048）
