摘要
采用饲喂含锌微量元素添加剂的猪排出的猪粪 (试验猪粪 )和饲喂普遍饲料的猪排出的猪粪 (普通猪粪 )作小麦—水稻盆栽试验。供试土壤为酸性黄壤 ,中性冲积土、石灰性紫色土。结果表明 :三组土壤上都是随着试验组猪粪施用量增大 ,土壤全锌残留量和有效锌含量愈高。如每年以小麦—水稻轮作方式种植 ,长期施用高锌猪粪 (以施用量最低 10g/盆计 ) ,根据土壤 pH的不同 ,则 12年～ 2 8年间土壤中锌含量可能超过国家土壤环境质量标准的二级标准[4 ] ,pH值愈低 ,情况愈严重。
Both the trial dung coming from pigs fed in foodstuff contained high Zn and the common dung were used to the wheat rice pot experiment Three typical soils (acid yellow soil,neutral alluvial soil,and calcareous purple soil)were used in the experiment The results showed that the total and effective Zn contents increased as the increase of the input of trial dung in the three kinds of soils If high Zn pig dung(10g/pot)was used yearly with a wheat rice planting system,the Zn content in soils could be higher than the value specified by Class Ⅱ of the National Standard(GB) within 12-28years due to the different soil pH
出处
《四川环境》
2000年第2期30-31,34,共3页
Sichuan Environment
