崇明地区典型设施土壤次生盐渍化特征研究
投稿时间:2019-09-27    点此下载全文
引用本文:杨锋,金海洋,周丕生.崇明地区典型设施土壤次生盐渍化特征研究[J].《上海交通大学学报》(农业科学版),2019,(6):143-147
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作者单位
杨锋 上海市崇明区农业技术推广中心,上海 202150 
金海洋 上海市农业技术推广服务中心,上海 201103 
周丕生 上海交通大学 农业与生物学院,上海 200240 
基金项目: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]
中文摘要: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。
中文关键词:设施土壤  次生盐渍化  硝态氮
 
Secondary salinization character study on typical greenhouse soil in Chongming area
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.
keywords:greenhouse soil  secondary salinization  NO3--N
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