Selection Of Suitable Tobacco Varieties And Research On Corresponding Cultivation Techniques In Longyan

Longyan is one of the most suitable cultivation areas for flue-cured tobacco in China.The flue-cured tobacco leaf produced there has the characteristic of typical Southeast fragrance style.However,the long-time cultivation of a single variety of Yunyan 87 in Longyan has shown obvious degradation of economic and quality characters.Therefore,it is of great significance for selecting the suitable flue-cured tobacco varieties from some varieties to improve the quality of tobacco leaf in Longyan.The main results are as follows.(1)The analysis of multiple objective decision making(MODM)based on entropy power shows that the varieties(lines)suitable for cultivation in Longyan are as follows:Changting,FL88F;Minyan 312,Shanghang,FL88F;Yongding,Minyan 312.(2)Through the analysis of the yield and average price contribution of acreage in Longyan tobacco area,it is showes that there are significant or very significant differences only between regions,which shows that the primary concern in the production of flue-cured tobacco in Longyan area is the distribution of planting area and the second is the distribution of varieties.The ecological adaptability of early spring flue-cured tobacco cultivars in Longyan area was narrow,and the early spring flue-cured tobacco cultivars with FL88f were better than the CB-1(CK).The ecological adaptability of spring flue-cured tobacco cultivars are wider,and the adaptability of spring flue-cured tobacco cultivars are better than that of the control tobacco cultivars.The grade quality of early spring flue-cured tobacco and spring flue-cured tobacco in the Wuyi Mountain Region are the best.The quality of those in Hawksbill Mountain Region are the second best.The quality of those in Bopingling Region are the third best.Therefore,in combination with the cultivation region;early spring flue-cured tobacco variety FL88f is suitable for planting in Wuyi mountain area,FL88f and Minyan 312 are suitable for hawksbill mountain area;Yunyan 87 are suitable for planting in Bobingling area,followed by Minyan 312.(3)According to the study of Minyan 312 by single plant development control technology and nutrient application technology,the population control technology using the number of leaves left had no effect on the quality of the flue-cured tobacco leaf of Minyan 312,and the contribution rate was 0;Nitrogen fertilizer application is an important technology that affects individual plant development and its quality.Among them,the effect of nitrogen application and contribution are the most important,followed by nitrate-ammonium-nitrate-ratio and base-top-dressing-fertilizer-ratio.The optimal treatment of the individual development control technology is 126kg/hm2,ammonium nitrate ratio 6.3:3.7,base tracking ratio 6.7:3.3,leave 17.5 leaves;The optimal treatment of nutrient transport technology was 123 kg/hm2 of nitrogen,399 kg/h m2 of potassium and 66 kg/hm2 of magnesium.(4)According to the research of suitable transplanting period,the most suitable transplanting of Minyan 312 is late January,flue-cured tobacco varieties of Minyan 312 in Longyan area are resistant to low temperature,and the growth period of its plant is prolonged by early transplanting,which is beneficial to the accumulation of material in tobacco plant.