| 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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| 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] |
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| 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 |
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| Secondary salinization character study on typical greenhouse soil in Chongming area |
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| 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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