| The primary root and the first to ninth layer secondary roots of two maize genotypes of Yedan-13 (drought-tolerant) and Danyu-13 (non drought-tolerant) with different tolerance to drought in the field conditionwere investigated to study their content of nitrogen, phosphorous, kalian, calcium and magnesium by ICP.The results showed that the total nitrogen and available nitrogen of Danyu-13 were higher than that of Yedan-13 at the most significant difference level (P<0.01) .And the calcium and magnesium of Yedan-13 were higher than that of Danyu-13 at the most significant difference level (P<0.01) .However, there were no significant differences in phosphorous and kalian of root between the two genotypes (P>0.05). |