双氰胺对设施菜地土壤硝酸盐淋溶和苦苣硝酸盐累积的影响  

Effects of Dicyandiamide on Soil Nitrate Leaching and Nitrate Accumulation in Chicory Under Protected Cultivation

作　　者：项琳琳[1,2] 赵牧秋[1,2] 王俊[1,2] 史奕[1] 陈欣[1] 

机构地区：[1]中国科学院沈阳应用生态研究所陆地生态过程重点实验室,辽宁沈阳110016 [2]中国科学院研究生院,北京100049

出　　处：《农业环境科学学报》2009年第9期1965-1969,共5页Journal of Agro-Environment Science

基　　金：国家科技支撑计划(2008BADA7B08);中国科学院知识创新工程重要方向项目(KSCXZ-YW-N-037)

摘　　要：在设施菜地条件下,研究了添加不同浓度双氰胺(DCD)对土壤和苦苣硝酸盐含量及苦苣产量的影响。结果表明,添加2%和5%双氰胺可有效降低苦苣生长初期表层土壤硝酸盐含量,推迟硝酸盐含量高峰出现15d左右,减少硝酸盐的深层淋溶,显著降低苦苣体内硝酸盐和亚硝酸盐含量,提高苦苣产量。添加10%双氰胺使土壤硝酸盐含量始终保持较低水平,对防止硝酸盐深层淋溶和降低苦苣硝酸盐和亚硝酸盐含量效果显著,对苦苣产量影响较小。A field experiment was conducted on a protected vegetable field in Shenyang suburb of Liaoning to study the effects of applying dicyandiamide （DCD） on the nitrate leaching in the profile of aquic brown soil and the nitrate accumulation in chicory under protected cultivation. Applying DCD with a rate of 2% and 5% of fertilizer N could effectively decrease the nitrate accumulation in topsoil at the early growth stage of chicory, postpone the peak period of this nitrate accumulation by about 15 days, reduce the nitrate leaching into deeper soil layers, and also, decrease the nitrate and nitrite contents in chicory plants and increase chicory yield. When the application rate of DCD was 10% of fertilizer N, soil nitrate content maintained at a lower level, which was of significance in preventing nitrate leaching into deeper soil layers and decreasing the nitrate and nitrite contents in chicory plants, and chicory yield was less affected.

关 键 词：设施菜地 双氰胺 硝酸盐 

分 类 号：S181[农业科学—农业基础科学]