摘要
研究了硝态氮与氨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＋４－Ｎ为９：３和６：６ｍｅ／Ｌ的处理，较单一ＮＯ－３－Ｎ处理，能促进水培生菜生长，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。无论在何种氮源下，随着铁供应的增加，生菜叶片中硝酸还原酶活性显著增强，硝酸盐含量则显著下降。
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.
出处
《安徽农业大学学报》
CAS
CSCD
1995年第3期266-271,共6页
Journal of Anhui Agricultural University
关键词
氮素形态
水培
生菜
铁素营养
N forms
Hydroponics :Lettuce
Iron nutrition
Nitrate accumulation
