Study On Adaptability Of Flue-cured Tobacco Varieties Of Hunan Shaoyang Tobacco Area

For the purpose to upgrade flue-cured tobacco varieties and reasonably layout in Shaoyang tobacco zone, in this study,10varieties, such as CF202, were chosen for a adaptability screening test in Shaoyang tobacco zone, adaptable varieties would be chosen for further comprehensive characteristic comparison test, so as to select appropriate flue-cured tobacco varieties for tobacco production in Shaoyang region.In2011,10varieties had been chosen to carried out an adaptability screening test in Hongshi Research Station, Shaoyan city, Hunan. The results showed that the main agronomic characteristics of these ten varieties were good, their growths were unanimous, but their naturally fall yellow characteristics and curing characteristics were different. The climate spot resistance of eight new varieties was better than that of their contrast varieties, K326and Yunyan87. Agronomic characteristics and yield of CF202, CF204and G80were better than those of their contrast varieties, K.326and Yunyan87.Among these new varieties, CF202was cylindrical form, its natural fall yellow characteristic was good, but a little bit too high.CF204was tower form, medium height, natural fall yellow characteristic was perfect; G80was tower form, medium height; natural fall yellow characteristic was perfect. The economic characteristic of Guiyan4was best within these10varieties, up to35937Yuan per hectare, and its area yield is highest; gloss, elasticity and oil content of Zhongyan102, Guiyan4and Yunyan87were all perfect.In2012. four varieties, which were CF204, K326, Yunyan87and HY-9-7, were chosen for a comprehensive characteristic comparison test. Result showed that within these four varieties, comprehensive characteristic of Yunyan87was best, with a vigorous growth during whole growth period. Its effective leaves were about nineteen, leaves were stretched well, after multi-topping, plants grew into cylindrical form, its leaves were easy to cured, organization of its cured leaves were loose, full of oil content, with high proportion of superior leaves; But Yunyan87was susceptible to disease threat in the field, especially in the later growth stage it had suffered from red star disease and wild fire disease. The growth of Zhongyan204was weak in the field, its leaves were thin with pale color, and its cured leaves were mainly with lemon yellow color also, what was the more, with low area yield.K326grew shorter in the field, leaves were thicker, stems girth were coarse, area yield and disease resistance were good, but bulky veins were hard to cured, so, more green veins and more variegated leaves.HY-9-7overall grew well in the field, medium area yield, its cured leaves were with loose tissue structure, moderate thickness and slants thin color, which among lemon yellow and orange yellow. Its disease-resistant ability was stronger than that of Yunyan87.The results of adaptability screening test and synthetically considering chemical component analysis and sensory quality evaluation in two years showed that suitable varieties for planting in Shaoyang tobacco zone were:K326, Yunyan87, HY-9-7(Xianyan3)...