液培条件下氮素形态和化控技术对蔬菜硝酸盐累积的影响  

Effect of Nitrogen Form and Chemical Control Technique on Nitrate Accumulation of Vegetables in Nutrient Solution Culture

作　　者：李海英[1] 彭光浩[1] 

机构地区：[1]中国科学院南京土壤研究所

出　　处：《土壤》2007年第6期896-899,共4页Soils

摘　　要：以生菜和青菜作为供试材料,在液培条件下,研究了不同形态N素对蔬菜硝酸盐累积的影响,同时观测了叶面喷施两种低硝酸化剂的化控技术对降低蔬菜硝酸盐积累的效果。研究结果表明:N素形态对生菜的生长和硝酸盐的积累影响显著,而对青菜的影响不显著;相同形态N素供应时,青菜叶片中硝酸盐含量显著高于生菜中的含量,硝酸盐的积累取决于不同蔬菜品种的遗传特性。青菜和生菜叶面喷施两种低硝酸化剂对降低蔬菜中硝酸盐含量的作用不显著。Two kinds of vegetables (lettuce and Chinese cabbage) were used in a hydroponic experiment on effects of nitrogen form and foliar spraying of nitrate-lowering agents on nitrate accumulation in the vegetables growing in nutrient solution. Results showed that the effects of nitrogen form were significant on growth and nitrate accumulation of lettuce and almost not on Chinese cabbage. When receiving the same form of nitrogen, Chinese cabbage was found significantly higher than lettuce in nitrate concentration in leaf, suggesting that the accumulation of nitrate is determined by inherited characteristics of different vegetables. The effects of foliar spraying of two kinds of nitrate-lowering agents were not significant on lowering nitrate content in vegetables.

关 键 词：氮素形态 化控技术 硝酸盐积累 蔬菜 液培 

分 类 号：S143.1[农业科学—肥料学] S63[农业科学—农业基础科学]