摘要
对太湖流域某地误用硫酸铜废水灌溉导致的污染土壤和作物体铜（Ｃｕ）含量分析表明：Ｃｕ 主要富集于表层土壤，受Ｃｕ 污染的表层土壤Ｃｕ 含量是该地区非污染区的１．６～５．１倍． 受Ｃｕ 污染的农田种植水稻其糙米、稻壳和稻草中Ｃｕ 含量分别是非污染区的１１．１～４．６、１８．３～３．７ 和９．３～２．３ 倍． Ｃｕ 在水稻植株体分配是：稻草＞ 稻壳＞ 糙米． 土壤Ｃｕ 含量与稻草和稻壳Ｃｕ含量之间符合指数函数关系，与糙米Ｃｕ 含量之间符合线性函数关系． Ｃｕ 污染导致水稻减产１８％ ～２５％ ；主要是由于水稻Ｃｕ中毒影响水稻根系生长发育，抑制水稻分蘖和减少有效穗数． 如果不采取治理措施，使受Ｃｕ 污染土壤Ｃｕ 含量下降到该地区非污染区水平至少需要１５～９２ａ． 因此，对污染土地采取治理是必要的．
The results of analysis of copper (Cu) in crop and soil polluted by irrigation water contained CuSO 4(12 mg·kg -1 ) indicated that Cu was enrich in top layer soil,and the content of Cu in polluted soil was about 1.6～5.1 times as much as that in unpolluted soil.Content of Cu in brown,shell and straw of rice grown in polluted soil were 11.1～4.6,18.3～3.7,9.3～2.3 times as much as that in unpolluted soil respectively.Distribution of Cu content:straw>shell>brown rice.Index equation (line equation) of relationship between content of Cu in soil and that in straw and shell of rice (brown rice) were found.Cu pollution resulted in 18%～25% decrement of rice yield because Cu poisoning of rice affected on growth of root,restrained effective tiller and decreased effective tassel.It is necessary to administer the soil polluted by Cu,otherwise it will take about 15～92 years to renew unpolluted soil under natural condition.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2000年第2期62-65,共4页
Environmental Science
关键词
土壤
水稻
污染
分布
相关性
铜
Cu,soil,rice,pollution,distribution,relationship.
