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不同氮素形态及配比对水培生菜铁营养的影响
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摘要:
研究了硝态氮与 态氮及其不同配比对水培生菜铁素营养的影响。结果表明,不同形态氮素显著影响植物的铁素营养状况,NO^-3-N:NH^+R-N为9:3和6:6me/L的处理,较单一NO^-3-N处理,能促进水增生菜生长,提高叶绿素含量,增加植物体内铁的活性,降低叶片中硝酸盐的积累,降低营养液成本。
关键词:  氮素形态 水培 生菜 铁素营养
DOI:
基金项目:
Influence of N Forms and NO-3-N/NH+4-N Ratio on Iron Nutrition in Hydroponically Grown Lettuce
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Abstract:
The effect of N forms and NO-3-N/NH+4-N ratio on iron nutrition in hydroponicallygrown lettuce were investigated.It was found that suitable NO-3-N/NH+4-N ratio(9:3,6:6me/L) in nutrient solution can significantly promote plant growth, raise chlorophyll content,improve plant iron utilization efficiency , and reduces nitrate accumulation in leaves,and the costof nutrient solution was thus reduced. The role of iron in N metabolism was also analysed. Withthe increase of iron supplemented to the nutrient solution ,the activity of nitrate reductaseincreased and the accumulation of nitrate in leaves reduced.
Key words:  N forms,Hydroponics :Lettuce,Iron nutrition,Nitrate accumulation

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