Effects of Different Basal and Topdressing Ratios on Nitrogen and Phosphorus Nutrient Loss and Economic Traits of Tobacco Leaves in Lake Basin

• Yurong ZHU, 
• Chengren OUYANG, 
• Liangjun YU, 
• Dexun WANG, 
• Dehai YANG, 
• Jintao ZHANG, 
• Zhaoli XU, 
• Zhengxiong ZHAO