Studies On Leaf Maturity Of Flue-cured Tobacco In Different Nutritional Level

This experiment was conducted to discover the theory of increasing tobacco's productivity and quality with the method of chemistry regulation. In this study, discussed the theory basis of the most suitable mature recovery under different nutritional level .The experiment had supposed 3 nutritional levels processing, 3 repetitions, 2 varieties, altogether 18 plots. The experiment flue-cured tobacco variety is Yuyan87, K326 takes the check variety. Through to inspected the yellow leaf,the leaf number, the mud time, the topping time, the mining time, the recovery conclusion time, suitable time, the ripe number of days in respectively various spots and different disposed. Determined the pH value, the soluble protein, the chlorophyll in different leaf position and different leaf tobacco maturity, and determined the physical target, the chemical composition; After as well as determines the flue-cured's tobacco produces and quality, the better tobacco proportion, even price. It has conducted the relations to different processing In maturity process. The results are as follows:1. Under the identical cultivation way, Yuyan87 in the output value, the better tobacco proportion, the even price are better than K326. In owes under fat processing, Yuyan87 compared to K326 more than 94.07 kg·hm^-2, 1097.7 y·hm^-2, 10.4%, 0.83 y·kg^-1 ; Under suitable fat processing, it more than 307.3 kg·hm^-2, 250.5 y·hm^-2, 0.6%, 0.127 y·kg^-1 ; Under excessively fat processing, it more than 64.87 kg·hm^-2, 357.0 y·hm^-2, -0.1%, -0.012 y·kg^-1 .This indicated that, Yuyan87 can replace K326 to planting, and the economic efficiency can have the very big enhancement.2. Along with the maturity increased, the leaf thickness, weight, output, output value, the better tobacco proportion, even price assumes first elevates reduces in different disposed and various spots, Synthesizes each target appraisal, each disposed of Yuyan87's output value, the medium tobacco proportion, even price is highest after flue-cured when corresponds respectively is: Owes fat processing, unripe degree; Suitable fat processing, suitable ripe degree; Excessively fat processing, suitably ripe has been to between the ripe degree.3. Along with the maturity increased, through to research various spots of Yuyan87, we had discovered this: Enters mining time number of days each processing respectively is 55d, 60d, 68d, the mining conclusion time respectively is 95d, 121d, 143d. Upside of each processing respectively leaf enters suitably picks time number of days is 87d, 107d, 116d, depends the ripe number of days is 6d, 20d, 24d; Middle of each processing respectively leaf enters suitably picks time number of days is 78d, 88d, 95d, depends the ripe number of days respectively is 7d, 10d, 19d; Lower part of each processing respectively leaf enters suitably picks time number of days is 58d, 63d, 71d, depends the ripe number of days is 6d, 9d, 15d. Therefore, each processing leaf of Yuyan87 to arrive the most suitable recovery maturity days to be supposed to according to the various nutritional conditions, is arriving most leaf area number of...