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NO 3--N平均值达1370 mg/kg,有的甚至高达3054 mg/kg,土壤NO 3--N表聚明显,水旱轮作与芦笋连作的NO 3--N的含量差异悬殊,水旱轮作可以一定程度上降低土壤NO 3--N,延缓土壤次生盐渍化的形成。
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 NO 3--N of 0-5 cm salic horizon reached 1370 mg/kg in which the highest value was 3054 mg/kg.The NO 3--N accumulation at the surface soil layer was significant.The NO 3--N contents had a wide gap between paddy-upland rotation and continuous asparagus cropping.To some extent,paddy-upland rotation could reduce the NO 3--N contents of the soil,delaying secondary salinization.
作者
杨锋
金海洋
周丕生
YANG Feng;JIN Hai-yang;ZHOU Pi-sheng(Shanghai Chongming Agricultural Technology Promotion Center,Shanghai 202150,China;Shanghai Agricultural Technology Extension Service Center,Shanghai 201103,China;School of Agriculture and Biology,Shanghai Jiaotong University,Shanghai 200240,China)
出处
《上海交通大学学报（农业科学版）》
2019年第6期143-147,共5页
Journal of Shanghai Jiaotong University(Agricultural Science)
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]。
关键词
设施土壤
次生盐渍化
硝态氮
greenhouse soil
secondary salinization
NO 3--N
