Effects Of Nitrogen Fertilizer Level And Transplanting Date On Growth,developm Ent,yield And Quality Of Flue-cured Toba CCO CB-1 Variety

This paper studied the Different nitrogen levels and different transplanting period of CB- 1 the growth period of flue-cured tobacco, daejeon agronomic characters, biological accumulation in different periods, the field disease occurrence, economic characters, roast after baking the original smoke appearance, inner chemical components and smoking quality varying degrees of impact. Based on the randomized trial, poor adopts the statistical method of comparison and analysis of variance, the nitrogen level and transplanting stage two factors of the influence extent of each index of different to find the influential factors to the various index and made clear the influence of specific size. The experimental results showed that:1. The field growth period. Transplanting period and n application rate of CB- 1 the growth period of flue-cured tobacco field has important influence, in which the effect of transplanting slightly larger, and transplanting in advance and improve the n application rate can promote field growth period of the spin. As the extension of different growth period, the conditions of flue-cured tobacco are also significant changes have taken place. Transplanting period delayed leaf tobacco prosperous long-term rainfall increased obviously, demand for this period of moisture of tobacco plant, but the late maturity of tobacco leaf is poorer; Late transplanting period in advance can improve the field of high temperature and high humidity environment, good for improve the upper leaf tobacco maturity.2. The field agronomic traits. Transplanting period of field agronomic traits of tobacco plant is greater than the effect of n application, delaying transplanting can increase the stem circumference of tobacco plant, pitch and maximum leaf area, leaf number of tobacco plant more normal transplanting. Increased nitrogen fertilizer could improve the agronomic traits of tobacco plant the indicators.3. The biological accumulation of flue-cured tobacco. Early transplanting with increasing n application processing can improve the flue-cured tobacco biological accumulation, CB- 1 on tobacco plant growth and development of whole play a role in promoting.4. The field diseases. Transplanting and control n application ahead of time, can effectively control the disease in initial period and occurrence degree, improve the high temperature and high humidity environment adaptability of adverse late field.5. Economic characters. After transplanting period to roast tobacco economic characters is greater than the effect of n application, as transplanting period postponed, the final output, output value, average price, the proportion of superior tobacco presents the downward trend, such as n application rate is at a moderate level of n under various economic indicators, the largest fertilizer quantity too little, too much will reduce after baking the economic characters of the leaves.6. After baking quality appearance. Early transplanting with increasing n application rate can make smoke after the original color orange, identity, oily cent to strengthen, chroma. In addition, early transplanting and lower n application can reduce the different parts of tobacco leaf color.7. The intrinsic chemical composition. N application rate increased, early transplanting period can improve the content of nicotine, n application increased the sugar alkali ratio, alkali than two than sugar, nitrogen is reduced, early transplanting and too late transplanting with potassium chloride ratio is decreased obviously.8. A review of the quality. Take appropriate early transplanting cultivation means of nitrogen in the combination, can increase the inherent flavor, reduce tobacco inner stimulus, the qing scent style characteristic is more outstanding, increase leaf tobacco industry use value.