Khwam samphan rawang khwam thon to aluminum kap khwam thon to dinprieo khong phan khao.
1989
Suniyom Taparb
Differences among rice varieties caused by aluminum toxicity especially on root length were clearly observed in seedling aged 14 days after sowing in solution containing 25-50 ppm Al3+. Seedlings of 100 rice varieties were evaluated by their aluminum tolerance in nutrient solution of 0 and 30 ppm Al3+. Relative root length was then used as criterion of aluminum tolerance. Aluminum tolerance of 100 varieties was not related to acid sulfate soil tolerance in cases of absolute growth and yield, relative growth, relative yield and yield components. Aluminum tolerance of photoperiod-sensitive varieties was related to acid sulfate soil tolerance in cases of relative root length and relative tillering. Twenty two varieties were tolerant to acid sulfate soil. Where 5, 12, 5 of those were classified as tolerant, intermediate and susceptible to aluminum, respectively. Aluminum tolerance of selected acid sulfate soil tolerant varieties which were subjected to replicated yield trial in acid sulfate soil Rangsit series was not significantly related to yield and yield components. Because of less amount of aluminum in the acid sulfate soil, aluminum was therefore not a major rice growth inhibiting factor in these soils. Result of the relationship between aluminum tolerance in solution culture and acid sulfate soil tolerance of tested 100 rice varieties was not significant.
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