Effect of Organic Fertilizer on Yield and Quality of Flue-cured Tobacco in Weibei Loess Tableland
Studying the effects of organic fertilizer on flue-cured tobacco yield and quality can provide a theoretical basis for the application of organic fertilizer partially replacing chemical fertilizer in flue-cured tobacco production regions in Weibei dry plateau of Shaanxi Province.Through a combination of field experiment,laboratory chemical analysis and sensory evaluation,the effects of partially replacing chemical fertilizer with organic fertilizer on the growth,development,yield,chemical composition,sensory evaluation of smoking quality,and economic benefits of flue-cured tobacco were investigated.The results showed that replacing 20％to 40％of chemical fertilizer with organic fertilizer was beneficial for the early maturity of flue-cured tobacco.During the maturity stage,it led to a decrease in the SPAD value of the forth leaves of tobacco by 5.63％to 6.83％.Compared to conventional fertilization,the proportion of upper-medium grade tobacco leaves increased by 19.94％to 29.76％when organic fertilizer partially replaced 20％to 40％of chemical fertilizer.The total output value and net output value increased by 4.70％to 6.96％and 8.12％to 20.26％,respectively.The comprehensive consuming evaluation score was significantly higher in 10％of chemical fertilizer replaced by organic fertilizer treatment than other treatments.Principal component analysis was used to comprehensively evaluate the 11 indicators representing the quality of flue-cured tobacco.The treatment with organic fertilizer partially replacing 30％of chemical fertilizer obtained the highest overall score,followed by the treatment with organic fertilizer replacing 20％of chemical fertilizer,and then the treatment with organic fertilizer replacing 40％of chemical fertilizer.In the dry terraced tobacco area of the northern Wei River Valley in Shaanxi,replacing 20％to 40％of chemical fertilizer with organic fertilizer can promote the inherent coordination of tobacco chemical composition,significantly enhance tobacco maturity,increase the proportion of upper-medium grade tobacco leaves,and improve the economic benefits of flue-cured tobacco.
NETL
NSTL
万方数据
