Effect of Nitrogen Topdressing Amount on Chlorophyll Content in Leaves of Flue-cured Tobacco at Root Extending Stage under Plastic Film Mulching Condition
The research aimed to study the effects of the nitrogen topdressing amount on chlorophyll content in leaves of flue-cured tobacco at the root extending stage under the plastic film mulching condition.Under the field experiment and the plastic film mulching conditions,five levels of nitrogen topdressing were set to research the effect of different nitrogen topdressing amount on chlorophyll content in leaves of flue-cured tobacco at the root extending stage.The result showed that the chlorophyll content in le...