酸性土壤铝的形态、迁移特征及对林木根系的影响  

Conformation and transport characteristics of aluminum in acid soil and its effect of tree root growth

作　　者：丁爱芳[1] 俞元春[2] 孟磊[2] 李淑芬[2] 

机构地区：[1]南京晓庄学院,江苏南京210017 [2]南京林业大学,江苏南京210037

出　　处：《江苏林业科技》2001年第3期14-17,共4页Journal of Jiangsu Forestry Science & Technology

基　　金：国家自然科学基金资助项目! (39770 6 0 7) ;国家自然科学基金重点基金资助项目 !(396 30 2 40 )

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 。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.

关 键 词：孔洞根系生长法 酸性土壤 铝 形态 根系生长 迁移特征 

分 类 号：S714.2[农业科学—林学]