土壤中铝对火炬松根系影响的试验研究

Experimental Studies on the Effect of Aluminum in the Soil on the Root System of Pinus taeda

采用孔洞根系生长法，进行铝对火炬松根系生长影响的野外实验研究，结果表明：土壤中加入铝离子后，活性铝含量大大提高，pH值显著下降，根的数量较少且表现为铝毒症状；加入钙离子后，在pH值提高的同时，活性铝含量也显著下降，根生长得到了明显改善。说明铝对根有抑制作用，而钙对铝毒有拮抗作用。

The results indicated that aluminum had a restrictive effect on the root system of Pinus taeda whilecalcium had a resistant effect on the aluminum toxin.