Title: Effects of Different Nitrogen Application Rate on Flue-cured Tobacco Growth and Development and Its Upper Leaf Quality under Plastic Film Stress
Abstract: [Objective] The aim was to study effects of different nitrogen application rate on flue-cured tobacco growth and development and its upper leaf quality under plastic film stress in Huaihua Area,provide a theoretical basis for flue-cured tobacco production of Huaihua in future.[Method] After transplanting,the plastic film which mulched flue-cured tobacco was not removed in the whole growing stages.Fixing N∶P∶K ratio(1∶1∶3),pure nitrogen for 135,120,105 kg/hm2 respectively,the different nitrogen application rate on the influences of flue-cured tobacco growth and development and its upper leaf quality were studied.[Result] The results showed that with the increase of nitrogen application rate,flue-cured tobacco plant grew better,photosynthetic rate,stomatal conductance and transpiration rate were getting higher.All treatments flue-cured tobacco leaf tissue structure were stiff,identity was thick,sugar content of the upper leaf was low,total alkali content of the upper leaf was more than 3%.They were disadvantage to quality.In general,the quality differences between different treatments were no significance.[Conclusion] No removing the plastic film reduces nitrogen application rate and nitrogen loss,but the film stress is probably a reason that causes the leaf quality not coordinated.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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