摘要
为了解施肥对蔬菜地土壤、蔬菜和地表水体中δ^(15)N丰度的影响,选择2012至2018内施用不同肥料的28块蔬菜地(包括13块施用化肥蔬菜地、8块施用畜禽粪蔬菜地和7块施用商品有机肥加化肥蔬菜地),采样分析表层土壤、蔬菜地上部分和地下部分及地表径流样的δ^(15)N丰度。结果表明:施肥种类对土壤、蔬菜和地表径流中δ^(15)N丰度均可产生显著影响,其丰度值由高至低依次为:畜禽肥>商品有机肥加化肥>化肥。蔬菜和地表水与土壤之间的δ^(15)N丰度存在正相关。分析认为,蔬菜产品中氮同位素组成可以作为鉴定有机蔬菜的辅助依据,地表水体中δ^(15)N丰度可作为水体中氮素污染源的指标。
To understand the effect of fertilization on the abundance ofδ^(15)N in soil,vegetables and surface water,28 plots of vegetable field applied with different fertilizers during 2012 to 2018,including 13 plots with chemical fertilizer,8 plots with livestock manure and 7 plots with commercial organic fertilizer and chemical fertilizer,were selected.The surface soil,both aboveground and groundwater parts of vegetables,and surface runoff samples in the fields were collected and their abundance ofδ^(15)N was measured.The results showed that fertilizer types had significant effects on the abundance ofδ^(15)N in soil,vegetables and surface runoff,and the abundance decreased in the order of livestock and poultry fertilizer>commercial organic fertilizer+chemical fertilizer>chemical fertilizer.There was a positive correlation between the abundance ofδ^(15)N in vegetables and surface water and soil.It is concluded that the nitrogen isotope composition of vegetable products could be used as an auxiliary basis for the identification of organic vegetables,and the abundance ofδ^(15)N in surface water could be used as an indicator of nitrogen pollution sources in water body.
作者
张丽君
胡燕芳
王京文
章明奎
Zhang Lijun;Hu Yanfang;Wang Jingwen;Zhang Mingkui(Pingyang County Agricultural and Rural Bureau,Pingyang 325400,Zhejiang,China;Kecheng District Soil-fertilizer and Rural Energy Technology Extension Station of Quzhou City,Quzhou 324000,Zhejiang,China;Hangzhou Plant Protection and Soil-fertilizer Station,Hangzhou 310020,Zhejiang,China;College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058,Zhejiang,China)
出处
《农学学报》
2021年第7期28-31,共4页
Journal of Agriculture
基金
国家自然科学基金面上项目“长期全年淹水集约种植对水耕人为土性态演变与物质循环及生态功能的影响”(41977001)。
关键词
蔬菜地
δ^(15)N丰度
有机蔬菜
有机肥
化肥
污染源识别
Vegetable Field
δ^(15)N Abundance
Organic Vegetables
Organic Fertilizer
Chemical Fertilizer
Pollution Source Identification
