摘要： 研究了内蒙古自治区赤峰市设施土壤盐分变化规律。结果表明:赤峰市4个蔬菜主产区设施土壤含盐量均高于相邻大田(CK),除元宝山区外,松山区、红山区及宁城县0～5cm与其低层5～20cm土壤含盐量达显著或极显著差异,盐分有明显的表聚现象。宁城县连续栽培20年日光温室土壤含盐量达到最大值,表层0～5cm4.12g/kg,低层5～20cm1.8g/kg,4个地区设施土壤平均含盐量顺序依次是宁城县>元宝山区>松山区>红山区,宁城县表层和低层平均含盐量最高分别为3.14g/kg和1.45g/kg,比对照大田(CK)增加292.5%和215.2%。连续栽培5年左右设施土壤耕层0～20cm平均含盐量达到最高,这与赤峰市设施农业发展和种植结构调整等有关。引起设施土壤盐渍化的盐分离子存在地区差异,宁城县设施土壤SO42-含量最高达到1008mg/kg,NO3-含量最高为936mg/kg,Ca2+含量最高达448mg/kg,该地区设施土壤含盐量与阴离子SO42-、NO3-呈极显著正相关,相关系数分别为0.975**和0.974**,与阳离子Ca2+、Mg2+、Na+含量呈显著正相关,相关系数为0.875*、0.873*和0.865*;元宝山区设施土壤含盐量与Ca2+含量呈极显著正相关,与SO42-呈显著正相关,相关系数分别为0.991**和0.950*。
关键词:
设施土壤,
次生盐渍化,
相关分析
Abstract: Salt variation law in greenhouse soil was studied in Chifeng City,Inner Mongolia Autonomous Region.The result indicated:Salt content in greenhouse was higher than open field (CK)in main vegetable area of Chifeng city.Salt content was significant difference between 0-5 cm and 5-20 cm soil in Songshang Area,Hongshan Area and Ningcheng County but Yuanbaoshan Area.The highest salt content in 0-5 cm and 5-20 cm soil was 4.12 g/kg and 1.8 g/kg in greenhouse of Ningcheng County after planting 20 years.Average salt content in Ningcheng County reached the highest value,3.14 g/kg in 0-5 cm soil and 1.45 g/kg in 5-20 cm soil,and increased more 292.5% and 215.2% than CK respectively.Sequence of mean content was Ningcheng County Yuanbaoshan AreaSongshan AreaHongshan Area.It was after 5 years that mean salt was the most content.It was related to development of greenhouse agriculture and planting structure in Chifeng City.Ion causing secondary salinization of greenhouse soil was different in 4 areas.The highest SO42-,NO3- and Ca2+ of greenhouse soil in Ningcheng County reached 1 008 mg/kg,936 mg/kg,and 448 mg/kg.Salt content in the county showed highly significant positive correlation with content of SO42-,NO3-.Their correlation coefficient was 0.975** and 0.974** respectively.Salt content displayed significant positive correlation with Ca2+,Mg2+,Na+ and their correlation coefficient was 0.875*,0.873* and 0.865*;Salt content in Yuanbaoshan Area was highly significant or significant correlation with Ca2+ and SO42-.Their correlation coefficient was 0.991** and 0.950** respectively.
Key words:
Greenhouse soil,
Secondary,
Correlation analyzed
中图分类号:
姜伟, 王建国, 靳玉荣, 崔世茂, 王勇, 岳玲, 白晓雷. 设施土壤盐分变化规律及其相关分析研究[J]. 华北农学报, 2010, 25(2): 200-205. doi: 10.7668/hbnxb.2010.02.040.
JIANG Wei, WANG Jian-guo, JIN Yu-rong, CUI Shi-mao, WANG Yong, YUE Ling, BAI Xiao-lei. Studied on Salt Variation Law in Greenhouse Soil and Correlation Analyzed[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(2): 200-205. doi: 10.7668/hbnxb.2010.02.040.