The characteristics of nutrition in maize with different Al-tolerant

The characteristics of nutrition was studied in maize of inbred lines with different Al-tolerance by soluble culture. The results indicate that the average absorption rates of Ca2+, Mg2+ of Al-tolerant inbred lines were similar or slightly higher than that of CK, however the absorption rates decreased significantly in Al-sensitive inbred lines. The absorption capability of phosphorus of inbred lines tended to decline after treated with Al, and the Al-sensitive inbred lines decreased more sharply. The absorption capability of K~+ of inbred lines was difference, the Al contents in plant were higher than that CK when treated with Al and increased with Al rates. and Al contents in root of Al-sensitive inbred lines increased more than that of Al-tolerant inbred lines. Al absorbed by plant mainly concentrates in roots under Al stress. There was not correlation between the relative Al content in shoot and the Al-tolerant ability. The contents of Ca and Mg in most inbred lines decreased except Z01 and Z07 (both Al-tolerant inbred line) when treated with Al and the content of Ca in shoot of inbred lines were higher than that in root, but not difference found in them. The Mg content in root of Z01(Al-tolerant) dropped significantly with Al treatment, but relative Mg content in shoot of Z01 was higher than that of Z02(Al-sensitive). The K content of inbred lines with Al treatment slightly reduced, however, the relative content of K wasn't consistent with Al-tolerance ability. The content of Fe, Mn, Cu and Zn of inbred lines showed same declining trend by Al treatment, but the difference of relative content among three kinds of inbred lines in the experiment was found.