The Influence Of Phosphorus Foliage Fertilizer On Physiology And Biochemistry And Tobacco Leaf Quality For Upper Leaves

During the period of 2013 to 2014 year in Hunan Province, the upper leaves of flue-cured tobacco in the growth period were sprayed with phosphorus (0.50?1.75%, replaced with T1, T2, T3, T4, T5 and T6 respectively), which concentration increment was 0.25%; Then physiological indexes in the leaves of the growth period were studied; also conventional chemical composition, plamochromic pigment, aroma component and organic acid of the after curing tobacco leaves were studied. The experimental results showed that:1. During the period of vigorous period,1% concentration of superphosphate could help to improve the activity of SOD, INV, POD, PAL, NR, amylase, catalase and the content of chlorophyll b, chlorophyll and total plastid pigment; 1.25% concentration of superphosphate could help to improve MDA content and the activity of SOD, INV, POD, PAL, NR, amylase, catalase; 1.5% concentration of superphosphate could help to improve the activity of SOD and the content of MDA, the content of chlorophyll a, chlorophyll b, beta carotene; 1.75% concentration of superphosphate significantly helped to improve the content of chlorophyll a and beta carotene.During the mature period,0.75% and 1.75% concentration of superphosphate could help to reduce MDA content decrease; 1% concentration of superphosphate could help to reduce SOD activity decrease; 1% and 1.25% concentration of superphosphate could obviously reduce PAL activity; 0.75% concentration of superphosphate help to reduce NR activity.0.5% and 1% concentration of superphosphate obviously were favorable for the degradation of chlorophyll a and chlorophyll b; 1.75% concentration of superphosphate was not beneficial to the degradation of chlorophyll and beta carotenoids.2. Total sugar and reducing sugar content of for foliar 1.25% concentration of superphosphate were higher; Potassium content of for foliar 1.5% concentration of superphosphate was higher; Nnicotine, chlorine, total nitrogen, protein content of for foliar 1.75% concentration of superphosphate were higher; As the roast tobacco leaf, chlorophyll a and chlorophyll b, total chlorophyll and plastid pigment content of for foliar 1% concentration of superphosphate were significantly on the low side; The beta carotene content of for foliar 0.5% and 0.75% concentration of superphosphate was significantly on the low side; Total plastid pigment of for foliar 0.75% and 1% concentration of superphosphate was significantly on the low side; chlorophyll a and chlorophyll b content of for foliar 1.25% concentration of superphosphate were significantly on the low side.3. Contrasting different treatments, total carotenoids degradation products of for foliar 1.75% concentration of superphosphate were highest; Total aroma substances, total class westpac alkanes and neophytadiene content of for foliar 1% concentration of superphosphate were highest; Aromatic amino acids content of for foliar 0.75% concentration of superphosphate was highest; Increasing sequence of the influence of spraying phosphorus nutrition on total organic acids content was as follows:1%(68.13 mg/g),1.25%(58.07 mg/g),1.75%(49.85 mg/g),1.5%(46.22 mg/g), CK (44.96 mg/g),0.75%(40.88 mg/g), 0.5%(35.99 mg/g).4. The note, offensive odor and total smoking scores of for foliar 0.75% and 1% concentration of superphosphate were higher; The taste and irritation scores of for foliar 0.75% concentration of superphosphate were higher; The concentration and physiological strength scores of for foliar 1% concentration of superphosphate were higher; The concentration scores of for foliar 1.5% concentration of superphosphate were higher; Irritation scores of for foliar 1.25% concentration of superphosphate were higher.5. Suggestions for foliar 1%-1.25% concentration of superphosphate, in order to improve the internal quality of top tobacco.