Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2016, Vol. 32 ›› Issue (7): 18-22.doi: 10.11924/j.issn.1000-6850.casb15080082

Special Issue: 烟草种植与生产

Previous Articles     Next Articles

Research on Potassium Uptake and Accumulation of Drought-Resistant Variety‘Yuyan 6’

  

  • Received:2015-08-15 Revised:2015-09-14 Accepted:2015-09-22 Online:2016-03-18 Published:2016-03-18

Abstract: In order to study potassium absorption and accumulation characteristics of drought- resistant varieties at seedling stage, using sand and hydroponic culture as methods and three genotypes‘Yuyan 6’, ‘Nongda202’and conventional tobacco variety‘K326’as materials, the authors investigated the roots physiological characteristics, K absorption characteristics, as well as differences in dry matter accumulation of ‘Yuyan 6’. The results showed that dry matter accumulation and potassium content of various organs of ‘Yuyan 6’was similar to that of‘Nongda202’, but significantly higher than that of‘K326’, and‘Yuyan 6’ had greater absorption area and stronger root vigor. K absorption kinetics results showed that the maximum absorption efficiency (Vmax) of‘Yuyan 6’was closed to that of‘Nongda202’, but significantly higher than that of‘K326’. Michaelis constant (Km) and the lowest concentration (Cmin) had no significant difference among different tobacco genotypes. The results showed that‘Yuyan 6’was a potassium-rich variety of tobacco, which had a strong ability on potassium absorption and accumulation.