Study on the Difference of Tolerance of Different Flue-cured Tobacco Varieties(lines)to Low Nitrogen Stress at Seedling Stage
In order to analyze the barren resistance characteristics of different flue-cured tobacco varie-ties(systems)and screen the varieties(systems)suitable for growing in hilly tobacco area,Yuyan7,Yunongxiang201(Y2001),Y074,7564 and Qushou1 were used as experimental materials to study the effects of low nitrogen stress.The leaf chlorophyll value(SPAD),photosynthetic characteristics,root morphology and root activity were different among flue-cured tobacco strains.The results showed that Yuyan7,Y074 and 7564 strains could maintain a good leaf state with only 0.5 mmol/L nitrogen supply,and intercellular CO2 concentration,photosynthetic rate and transpiration rate were less affected by low nitrogen stress.
万方数据
维普
