Effects of liming and nitrogen sources on the yield and quality of burley tobacco, 2; effects of chemical constituents of tobacco leaves
1987
Kim, S.B. | Han, C.S. | Kim, Y.K. (Korea Ginseng and Tobacco Research Inst., Chonju (Korea R.). Chonju Experiment Station)
A field experiment was conducted to find out the effects of liming (soil pH) and sources of N on the chemical constituents of soil and leaf lamina of burley tobacco. Treatments consisted of liming (nonliming, liming to soil pH 5.5 and 6.5) as the main plot and N sources (compound fertilizer of containing 3.9% NH4-N abd 6.1% NO3-N, NaNO3, (NH2)2CO and (NH4)2SO4) as the sub-plot. The soil pH was high in NaNO3 plot, while low in (NH4)2SO4. But the differences of Ca2048 concentration in top soil among N sources were not detected. The NO3-N concentration in top soil was high in high limed and NaNO3 plot. The NO3-N content of leaf (lamina) at 75 days after transplanting was high in NaNO3 plot and CaO content of leaf at 45 days after transplanting was high in high limed plot. But neither liming nor N source had effect on the contents of total nitrogen, P2O5 and K2O of leaf during growing season. There were no significant differences in total alkaloid and total nitrogen contents of cured leaf (lamina) to liming and N source. But when the source of N was NaNO3, the content of total alkaloid was increased by adding lime. When the source of N was (NH4)2SO4, the content of K2O in cured leaf was high while CaO was low. But neither liming nor N source had effect on the contents of P2O5 and MgO in cured
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