Effects of water control to promote root and delayed transplantation on yield and quality of flue-cured tobacco
In order to clarify the effects of water control to promote root and sparse sowing to breed long-aged strong root seedlings on the yield and quality of flue-cured tobacco,with Yunyan 87 as the material,two factors were designed:control water to promote root and sparse sowing to breed long-aged tobacco seedlings,the differences of economic traits,physical properties,chemical composition and sensory quality of flue-cured tobacco under different treatments were ana-lyzed,and the comprehensive effect of yield and quality of different treatments was evaluated.The η2 value was used to evaluate the contribution rate of water control to root promotion and sparse sowing to cultivate long leaf age tobacco seed-lings and their interaction.The results showed that increasing the aperture of nursery site,adding microbial agents in the substrate,moisture management before and after leaching could cultivate long-aged tobacco seedlings,which was benefi-cial to improving the yield,output value and economic character index of flue-cured tobacco,improving the physical char-acteristics of tobacco leaves,enhancing the usability of chemical components of tobacco leaves,and improving the compre-hensive effect index of tobacco leaf quality and tobacco leaf production quality.The contribution rates of water control to promote root,sparse sowing to breed long-aged and their interactionon economic traits of flue-cured tobacco were 18.15％,63.38％and 18.46％,respectively.The contribution rates to the physical properties of tobacco leaves were 24.39％,35.74％and 39.87％,respectively.The contribution rates of tobacco chemical composition were 27.48％,37.47％and 35.05％,respectively.The contribution rates of tobacco leaf sensory quality were 22.04％,66.21％and 11.74％,respectively.Therefore,in the rainy paddy-tobacco growing area of the south,the application of water control to promote rooting and sparse sowing to breed strong-rooted seedlings with long-aged could delay transplanting,which is conducive to promoting the early growth and rapid development of flue-cured tobacco,improving the yield and quality of tobacco leaves,and has the popularization value.
flue-cured tobaccoyieldqualitycontrol water to promote roottransplanting seedling age
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