Effects Of Ratio Of Different Kinds Of Fertilizer On Yield And Quality Of Flue-cured Tobacco

Tobacco is one of China's major economic crops, fertilizer is an important factor of theyield and quality. in order to understand the relationship between fertilizer and flue-curetobacco quality, we set N P K formula test in Baoji City, Shaanxi Province.The study designthe field N, P2O5and K2O fertilization experiment with the method of three factor five leveltwo orthogonal revolving combination., to analysis different fertilizer on yield and quality.According to the data obtained, a ternary quadratic regression model was established, inwhich N, P2O5and K2O were independent variables and tobacco yield were dependentvariables. Use the computer to optimization the N,P2O5, K2O and yield regression. WithSPSS statistical software,we make empirical research to build tobacco leaf qualities model ofdifferent by using principal component analysis. Then,we analyzed and explained the resultsof the research. The main results were indicated as following:1. Field experiment showed that different fertilizers have a strong effect on yield offlue-cured tobacco. Different N, P2O5and K2O fertilization also have a significantly influenceon yield of flue-cured tobacco. In the low-fertilizer level, the yield of flue-cured tobaccowhich only fertilized K2O or P2O5was higher than only fertilized N. Increase the K2O amountcan improve the yield of flue-cured tobacco on the lower fertilization soil. The high or low Nall to the disadvantage of the yield of flue-cured tobacco. In the high P2O5or K2O level, theyield remains high. So when plant the flue-cured tobacco, we can appropriate increase in theamount of P2O5and K2O in the case of N suitable.2. We can got the high-yielding tobacco fertilization Scheme by the computer frequencyanalysis: N72.61-84.11kg/hm2,P2O590.76-105.14kg/hm2,K2O186.81-202.73kg/hm2.3. Using principal component analysis on the quality of the tobacco. The study selected13flue-cured tobacco chemical composition to determine the quality of tobacco, extract thefour principal components instead of the original indicators through principal componentanalysis, the establishment of the Tobacco Quality Evaluation Model, we can get the chemicalcomposition of flue-cured tobacco scores are in order of to1>11>7>12>21>2>8>23>18>20>15>13>17>19>16>3>6>14>22>4>9>10>5, which, on the11th, the7th rankedmore forward.