Abstract:

In order to investigate the effects of potassium application rate on the growth and potassium content of new strains of tobacco with high potassium efficiency. Field experiments with tobacco ‘K326’ (CK) and GK2, GK8 (with high potassium efficiency) were conducted in tobacco cultivation. On the difference of growth period, the experiments analyzed agronomical traits, dry matter accumulation and potassium content of tobacco in different potassium application rate. The results showed that: potassium application could significantly improve the biological properties of the new strains, promote the increase of plant height, stem thickness, leaf size and leaf number. Growing tobacco looked basically the same under different potassium levels in the rosette stage .The tobacco plants grew best under the potassium level of 240 kg/hm2 in the vigorous growing period, in different genotypes showed: GK8>GK2>‘K326’. The dry matter accumulation of the new strains roots, stems and leaves increased with potassium application rate increased. Amount of dry matter accumulation in different organs showed: leaf>stem>root, between the different potassium levels showed: T3>T2>T1. In different genotypes showed: GK8>GK2>‘K326’.