ObjectiveThis study aimed to investigate the ecological adaptability of flue-cured tobacco variety ‘NC297’ in Yunnan Province. MethodContinuous years of multi-location demonstration experiments were conducted at dif...ObjectiveThis study aimed to investigate the ecological adaptability of flue-cured tobacco variety ‘NC297’ in Yunnan Province. MethodContinuous years of multi-location demonstration experiments were conducted at different altitudes, to explore the ecological adaptability of flue-cured tobacco variety ‘NC297’. ResultThe results showed that ‘NC297’ had extensive ecological adaptability at different altitudes, with well-coordinated tobacco leaf yield (2 016-2 562 kg/hm 2 ), resistance, quality and other major agronomic traits, which were similar to the performance in its original habitat. ‘NC297’ had high fertilizer tolerance, high disease resistance, high quality and proper yield, which was easy to cure with high comprehensive score of the appearance quality and relatively appropriate ratio of sugar to nicotine and difference between contents of total sugar and reducing sugar. The aroma of ‘NC297’ was sweeter and richer than that of control varieties ‘K326’ and ‘Yunyan 87’. ‘NC297’ belonged to delicate fragrance-type tobacco, as a high-quality variety suitable for cultivation in regions with medium or high fertility at middle altitudes of 1 600-1 800 m. The most suitable planting density was 15 000-16 500 plants/hm 2 , the optimal fertilization ratio was N∶P 2 O 5 ∶K 2 O=1∶1∶3, application amount of nitrogen fertilizer was 105 -135 kg/hm 2 in the field and 75 -105 kg/hm 2 in the ground. ConclusionFlue-cured tobacco variety ‘NC297’ has high ecological adaptability and good quality characteristics at different altitudes and can be promoted and cultivated in different ecological zones.展开更多
基金Supported by Project of Yunnan Zhongyan Industry Co.,Ltd.(2008YL02-1,2009YL03-1)~~
文摘ObjectiveThis study aimed to investigate the ecological adaptability of flue-cured tobacco variety ‘NC297’ in Yunnan Province. MethodContinuous years of multi-location demonstration experiments were conducted at different altitudes, to explore the ecological adaptability of flue-cured tobacco variety ‘NC297’. ResultThe results showed that ‘NC297’ had extensive ecological adaptability at different altitudes, with well-coordinated tobacco leaf yield (2 016-2 562 kg/hm 2 ), resistance, quality and other major agronomic traits, which were similar to the performance in its original habitat. ‘NC297’ had high fertilizer tolerance, high disease resistance, high quality and proper yield, which was easy to cure with high comprehensive score of the appearance quality and relatively appropriate ratio of sugar to nicotine and difference between contents of total sugar and reducing sugar. The aroma of ‘NC297’ was sweeter and richer than that of control varieties ‘K326’ and ‘Yunyan 87’. ‘NC297’ belonged to delicate fragrance-type tobacco, as a high-quality variety suitable for cultivation in regions with medium or high fertility at middle altitudes of 1 600-1 800 m. The most suitable planting density was 15 000-16 500 plants/hm 2 , the optimal fertilization ratio was N∶P 2 O 5 ∶K 2 O=1∶1∶3, application amount of nitrogen fertilizer was 105 -135 kg/hm 2 in the field and 75 -105 kg/hm 2 in the ground. ConclusionFlue-cured tobacco variety ‘NC297’ has high ecological adaptability and good quality characteristics at different altitudes and can be promoted and cultivated in different ecological zones.