CAJ | 학술논문

采用室内培养方法,研究了酸雨对施用富含重金属的猪粪后菜园土壤重金属有效态含量的影响.结果表明,酸雨可显著降低菜园土壤pH值,但有机肥处理对酸雨有一定的缓冲作用.土壤Cu,Zn,Cd和Pb的有效态含量均随酸雨处理H~+浓度的提高而有不同程度的增加,有效态As含量则随H~+浓度的提高而降低,添加猪粪处理(M)与无机重金属处理(HM)的重金属有效态含量没有明显的差异,但含量均高于对照(CK).可见,除了As外,源于有机肥的重金属与无机重金属的有效性同样受到酸雨的促进作用.具有一定的环境风险.因此,在酸沉降频繁的南方地区,长期大量施用富含重金属的猪粪在改善菜园土壤养分状况的同时也增加了土壤环境和蔬菜的重金属污染的风险.
채용실내배양방법,연구료산우대시용부함중금속적저분후채완토양중금속유효태함량적영향.결과표명,산우가현저강저채완토양pH치,단유궤비처리대산우유일정적완충작용.토양Cu,Zn,Cd화Pb적유효태함량균수산우처리H~+농도적제고이유불동정도적증가,유효태As함량칙수H~+농도적제고이강저,첨가저분처리(M)여무궤중금속처리(HM)적중금속유효태함량몰유명현적차이,단함량균고우대조(CK).가견,제료As외,원우유궤비적중금속여무궤중금속적유효성동양수도산우적촉진작용.구유일정적배경풍험.인차,재산침강빈번적남방지구,장기대량시용부함중금속적저분재개선채완토양양분상황적동시야증가료토양배경화소채적중금속오염적풍험.
Incubation experiment was employed to study the effects of simulated acid rain on availability concentrations of heavy metals from the vegetable soils amended with metal-rich swine manure. The results indicated that the acid rain affected the availability concentrations of heavy metals by decreasing the pH of soil. The available concentrations of Zn,Cd, Pb increased with the increasing of H~+ concentration,whereas the opposite trend was observed for As. Furthermore, vegetable soil amended with metal-enriched swine manure as well as the inorganic heavy metals,would result in significantly higher available concentrations of Cu ,Zn, and As. Therefore, the bioavailability of heavy metals from vegetable soil amended with either the manure or the inorganic heavy metal,would be affected by acid rain and exhibit potential risks to environment. As a result,long-term heavy application of metal-rich swine manures to vegetable soils in the southern areas subjected to frequent acid rain deposition would not only improve the nutrient conditions of vegetable soil,but also increase a potential risk of heavy metal contamination to soil environment and vegetables.