摘要： 选用马铃薯(Solanum tuberosum L.)为试材,研究增施CO₂能否降低马铃薯块茎中硝酸盐含量并缓减土壤次生盐碱化,为提供安全的马铃薯产品同时延长温室土壤的可持续利用。试验采用传统氮素施肥和温室CO₂气体施肥结合的方法,研究了增施CO₂条件下氮素水平对马铃薯生长、氮素积累量、硝酸盐含量的影响。结果表明:增施CO₂,施氮量是48,96 kg/hm²在播种后第130天马铃薯全株干物质质量和氮素积累量、全株硝酸盐含量均高于不增施CO₂处理;施氮量是96,144 kg/hm²时块茎生物量、硝酸盐含量和氮素积累量显著降低。

关键词: CO₂, 硝酸盐, 氮素积累量, 马铃薯

Abstract: Recently,cultivated area of potato in greenhouse expanded.The secondary-salinization soil under greenhouse is accelerated and becomes the key factor influencing vegetable production.The effect of elevated CO₂ on the nitrate metabolism and N accumulation of potato(Solanum tuberosum L.) was studied in order to relief secondary-salinization soil and reduce nitrate of tuber.So safety potato is provided and the use of greenhouse is prolonged.The paper based on utilization of carbon dioxide fertilizer and traditional manuring of nitrogen in greenhouse.It was concluded that the dry matter,nitrate content of plant and nitrogen accumulation of plant were higher than control group with the nitrogen application rate of 48 kg/ha and 96 kg/ha under elevated CO₂ in 130 d after sowing.The dry matter,nitrate content of tuber and nitrogen accumulation of tuber decreased compared with control group when nitrogen application rate was 96,144 kg/ha under elevated CO₂.

Key words: CO₂ , Nitrate, Nitrogen accumulation amount, Potato

中图分类号: 

• S158．3