Effect of Nitrogen Concentration on Absorption and Accumulation of Mineral Nutrients During T obacco Seedling Stage

WANG Guo-feng; ZHU Jin-feng; LIU Fang; JIE Xiao-lei; LIU Shi-liang

doi:10.3969/j.issn.1004-3268.2014.01.015

Abstract：For elucidating the effect of N content in soil on absorption and accumulation of mineral nutrients in tobacco ,this paper studied the effect of N concentration on absorption and accumula-tion of several mineral nutrients by liquid culture during tobacco seedling stage .T he results showed that with the increase of N concentration ,the biomass of tobacco first increased and then decreased ,and reached a peak value when the N concentration was 140 mg/L .With the increase of N concentration ,the N and Zn content in the w hole tabacco increased ,but the Cu content de-creased;the content of P ,K ,Mg and Mn first increased and then decreased ,and reached a peak value when the N concentration was 280 mg/L ,so was the content of Ca ,but reached a peak value when the N concentration was 140 mg/L .With the increase of N concentration ,the accumulation of N and Mg in the w hole tabacco increased ;the accumulation of P ,K ,Ca ,Zn and Mn first in-creased and then decreased ,and reached a peak value when the N concentration was 140 mg/L ,so was the accumulation of Cu ,but reached a peak value when the N concentration was 70 mg/L . With the increase of N concentration ,the content and accumulation of N and Zn in tobacco leaves all increased ;the content and accumulation of P ,K ,Mg and Mn all first increased and then de-creased ,and reached a peak value when the N concentration was 280 mg/L ,the variation trend of content and accumulation of Ca in leaves was same to that in whole plant .So ,appropriate N con-centration could increase dry matter accumulation of tabacco ,affect the absorption and accumula-tion of mineral nutrients ,further affect the yield and quality of tobacco leaves .