Effects of Phosphorus Fertilization on the Physical Indexes of Different Fluecured Tobacco Varieties

The effects of phosphorus fertilization on the physical indexes of upper,middle and lower leaves of different flue-cured tobacco varieties which were Zhongyan100,K326,Zhongyan101 and NC89 were studied under field conditions.The results showed that,compared to the tobacco without phosphorus treatment,the single-leaf-weight of the tobacco with phosphorus fertilization increased,the leaf stalk content decreased and the density of leaf fabric increased in a certain context except the upper leaves of Zhongyan100 and Zhongyan101.The equilibrium moisture content of the leaves with P treatment was more suitable than that of those without P treatment.The leaf stuff force of each flue-cured tobacco variety with normal phosphorus treatment decreased,but the tensile strength increased obviously.The differences of the leaf stalk content as well as equilibrium moisture content and tensile strength of upper,middle and lower leaves of all varieties were significant among varieties.