【作者】 董丽欣； 李保国； 齐国辉； 郭素萍； 张雪梅；

【Author】 DONG Lixin,LI Baoguo,QI Guohui,GUO Suping,ZHANG Xuemei [1](College of Forestry,Agricultural University of Hebei,Baoding 071000,China)

【机构】 河北农业大学林学院；

【摘要】 为充分利用硫铁矿尾矿砂、确立硫铁矿尾矿砂为主要成分的矿山废弃地的调控利用措施,以不同Cu、S处理土壤中栽植的1 a生苹果树为试材,研究了土壤中的不同Cu、S含量对1 a生苹果幼树生长发育的影响。结果表明:土壤Cu含量为48.80 mg/kg时,致使1 a生苹果幼树死亡。当土壤有效S含量>1006.0 mg/kg时,1 a生苹果幼树的生长开始受到抑制;土壤有效S含量>1590.7 mg/kg时,1 a生苹果幼树新梢生长量呈现迅速下降趋势;土壤有效S含量为2404.5 mg/kg时,致使1 a生苹果幼树死亡。粗根Cu含量≥9.64 mg/kg,S含量≥3060.2 mg/kg,树干Cu含量≥4.74 mg/kg,S含量≥2629.6 mg/kg,1 a生苹果幼树就会受毒害死亡。1 a生苹果幼树各器官Cu元素分布规律为:细根>叶片>粗根>新梢>树干,S元素分布规律为:叶片>细根>粗根>新梢>树干。利用尾矿砂垫地时,要将混合后的土壤含S量控制在1500.0 mg/kg以下,尾矿砂比例控制在1/5以内。更多还原

【Abstract】 To make full use of pyrite ironsand and determine the adjustment measures of abandoned land which was composed of pyrite tailings,the 1 a young apple trees which were planted in different copper and sulfur degrees were used as materials to study the effects of different soil copper and sulfur contents on growth of the 1 a young apple trees.The results showed that: the 1 a young apple trees would be death when the soil copper content was 48.80 mg.kg-1.The growth of 1 a young apple trees would be inhibited when the soil available sulfur content was more than 1006.0 mg kg-1.The shoots growth of 1 a young apple trees would be inhibited increasingly when the soil available sulfur content was more than 1590.7 mg kg-1.The 1 a young apple trees would be death when the soil available sulfur content was 2404.5 mg kg-1.The 1 a young apple trees would be death when the copper content of coarse roots was more than 9.64 mg kg-1,the available sulfur content of coarse roots was more than 3060.2 mg kg-1,the copper content of the trunk was more than 4.74 mg kg-1and the available sulfur content of the trunk was more than 2629.6 mg kg-1.The copper content distribution rules in the organs of 1 a young apple trees were: the fine root > the leaf >the coarse root > the shoot > the trunk and the sulfur content distribution rules were: the leaf > the fine root > the coarse root > the shoot > the trunk.When using pyrite ironsands,we should control the soil available sulfur content less than 1500 mg kg-1 and the pyrite ironsands proportion less than 1/5 after pyrite ironsands mixed with normal soil.更多还原