关键词：
孔洞根系生长法;酸性土壤;铝形态;迁移;林木根系生长
摘 要：
采用孔洞根系生长法 ,研究了土壤中不同形态铝含量的变化及对杉木、马尾松根系生长的影响。结果表明 :土壤中加入铝离子后 ,土壤pH下降 ,活性铝含量明显增加 ,孔洞中林木根系表现为明显的铝中毒症状 ;加入钙离子后 ,土壤pH升高 ,土壤中活性铝含量显著下降 ,根系生长得到改善 ;1a后 ,与原孔洞中土壤相比 ,土壤中总铝含量降低 ,交换态铝含量有所降低 ,腐殖质铝含量升高
译 名：
Conformation and transport characteristics of aluminum in acid soil and its effect of tree root growth
作 者：
WT5BZ]DING Ai fang 1,YU Yuan chun 2,MENG Lei 2,LI Shu feng 2(1.Nanjing Xiaozhuang College,Nanjing 210017,China;2.Nanjing Forestry University,Nanjing 210037,China)[WT5”HZ]
关键词：
Hole root system growth method;Acid soil;Aluminum conformation;Transport;Tree root growth
摘 要：
Conformation and transport characteristics of aluminum in acid soil and its effect on tree root growth were studied by the hole root system growth method.The result revealed that the content of exchangeable aluminum in the soil increased greatly and soil pH value decreased when aluminum was added into soil.Aluminum influenced root growth significantly.If aluminum was added associated with calcium,soil pH value and the content of exchangeable aluminum in the soil decreased greatly,and root growth was also improved.Compared with in the original soil,the total amount of aluminum and exchangeable aluminum in the holes decreased whereas organic aluminum increased one year later.
