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崇明地区典型设施土壤次生盐渍化特征研究

Secondary salinization character study on typical greenhouse soil in Chongming area

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【作者】 杨锋金海洋周丕生

【Author】 YANG Feng;JIN Hai-yang;ZHOU Pi-sheng;Shanghai Chongming Agricultural Technology Promotion Center;Shanghai Agricultural Technology Extension Service Center;School of Agriculture and Biology, Shanghai Jiaotong University;

【机构】 上海市崇明区农业技术推广中心上海市农业技术推广服务中心上海交通大学农业与生物学院

【摘要】 本研究为探明崇明设施土壤次生盐渍化现状和特征,在崇明岛的4个地区的5种轮作模式中布置了10个样点,共采集了40个土壤样品,进行了测试与统计分析。结果表明,设施土壤表层有酸化的趋势,表层土EC值高,最高的达到6.47 mS/cm;0~5 cm积盐层NO3--N平均值达1 370 mg/kg,有的甚至高达3 054 mg/kg,土壤NO3--N表聚明显,水旱轮作与芦笋连作的NO3--N的含量差异悬殊,水旱轮作可以一定程度上降低土壤NO3--N,延缓土壤次生盐渍化的形成。

【Abstract】 This research is committed to judge the greenhouse soil salts situation and character,which collected 40 soil samples at 10 sampling points of 5 rotation systems in 4 areas on Chongming Island.According to the correlation analysis,the top of the greenhouse soil had a tendency of acidification.EC of the top soil ranked highest value of 6.47 mS/cm.The results showed the average NO3--N of 0-5 cm salic horizon reached 1 370 mg/kg in which the highest value was 3 054 mg/kg.The NO3--N accumulation at the surface soil layer was significant.The NO3--N contents had a wide gap between paddy-upland rotation and continuous asparagus cropping.To some extent,paddy-upland rotation could reduce the NO3--N contents of the soil,delaying secondary salinization.

【关键词】 设施土壤次生盐渍化硝态氮
【Key words】 greenhouse soilsecondary salinizationNO3--N
【基金】 上海市科技兴农重点攻关应用基础项目[沪农科攻字(2014)第7-2-4号]
  • 【文献出处】 上海交通大学学报(农业科学版) ,Journal of Shanghai Jiaotong University(Agricultural Science) , 编辑部邮箱 ,2019年06期
  • 【分类号】S156.4
  • 【被引频次】2
  • 【下载频次】176
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