Effects of Micro-fertilizer Combined with Small-Molecule Organic Matter on Growth and Quality of Flue-cured Tobacco

doi:10.13560/j.cnki.biotech.bull.1985.2018-0729

Abstract

Abstract: In order to improve the utilization rate of micro-fertilizer by flue-cured tobacco and improve the quality of tobacco leaves,using cultivar Yunyan 87 as the material in the field spray test,different treatments（CK：spraying water;T1：spraying micro-fertilizer;T2：spraying micro-fertilizer + sorbitol;T3：spraying micro-fertilizer + sodium gluconate;T4：spraying micro-fertilizer + glycine）were carried out to study the effects of micro-fertilizer combined with different small-molecule organic matter on the growth and quality of flue-cured tobacco. The results showed that the plant height,stem circumference,maximum leaf area,and dry matter accumulation of tobacco plants under different growth stages increased at different degrees in combination of micro-fertilizer and small-molecule organic matter while compared with the control and sole spraying micro-fertilizer. Fertilization with small-molecule organic matter effectively increased the chlorophyll content of tobacco leaves,and the photosynthesis indexes P_n,G_s,and T_r of leaves were significantly higher than that of the control,while C_i was significantly lower（P < 0.05）. Physical characteristics such as leaf width,single leaf weight,tensile force and filling value increased,while the tobacco stem stalk rate reduced. The chemical constituents such as reducing sugar,total sugar,potassium,sugar-to-alcohol ratio and potassium-chloride ratio of tobacco leaves rose at varied degree,while the contents of nicotine,total nitrogen and chlorine decreased,and the contents of Ca,Mg,B,Mo,Fe,Mn and Zn all increased at varying degrees. Maillard reaction products,carotenoid degradation products,solanone and content of neutral aroma components such as phytoene were high,and the quality of sensory evaluation was also greatly improved. The above results revealed that micro-fertilizer combined with small molecular organic matter may effectively improve the photosynthetic characteristics of leaves,promote the growth and development of tobacco plants,and improve the quality flue-cured tobacco leaves. In this experiment,the effect of glycine treatment combined with micro-fertilizer on the growth and quality of flue-cured tobacco was the best.

Key words: micro-fertilizer, small-molecule organic matter, flue-cured tobacco, growth, quality

XIONG Ya-nan, HAN Dan, WANG Fa-zhan, MA Xiao-han, JIN Yi-nan, CHEN Biao, CAO Li-jun, WANG Xiao-li, REN Zhi-guang, XU Zi-cheng. Effects of Micro-fertilizer Combined with Small-Molecule Organic Matter on Growth and Quality of Flue-cured Tobacco[J]. Biotechnology Bulletin, 2019, 35(2): 29-38.

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