CAJ | 학술논문

为了能给污泥资源开发利用开辟新的途径，以黄土为供试土壤，小麦（Triticumaestivum L.）为供试作物。采用盆栽试验研究了泥在不同Cd胁迫黄土中对小麦生长的影响及其对小麦各部位Cd的富集迁移规律。试验设计2个污泥处理水平，每个塑料盆中加入8.0 kg供试土壤或污泥含量为4.0%的供试土壤，土壤中以Cd(NO3)2?4H2O溶液形式加入的Cd质量分数分别为0.5、1.0、2.5、5.0、10.0、25.0、50 mg·kg-1，对应各处理为TS1~TS7。各胁迫水平均设置3个平行，同时设置对照TS0。结果表明，黄土中低水平的Cd胁迫可促进小麦的生长，且在Cd污染水平5.0 mg·kg-1时施污泥和未施污泥土壤中小麦生物量均最大，而高水平的Cd胁迫抑制小麦的生长，且Cd胁迫水平越高，抑制作用越强烈；Cd胁迫下施用污泥可促进小麦的生长，尤其是茎叶和籽粒的生长；小麦各部位Cd的含量随土壤Cd处理水平的升高而增加且呈显著正相关（P<0.05），各部位最大浓度分别可以达到：45.32、14.41、9.66 mg·kg-1，且根系>茎叶>籽粒，污泥的施用能促进小麦对Cd的吸收；小麦各部位对Cd的富集能力均随着土壤Cd胁迫水平的升高而先增加后减小，污泥的施用在一定程度上提高了小麦对Cd的富集能力，各部位富集系数最大分值分别为1.81、0.93、0.51，但对Cd进入小麦根系后向茎叶和籽粒的迁移影响不显著。
위료능급오니자원개발이용개벽신적도경，이황토위공시토양，소맥（Triticumaestivum L.）위공시작물。채용분재시험연구료니재불동Cd협박황토중대소맥생장적영향급기대소맥각부위Cd적부집천이규률。시험설계2개오니처리수평，매개소료분중가입8.0 kg공시토양혹오니함량위4.0%적공시토양，토양중이Cd(NO3)2?4H2O용액형식가입적Cd질량분수분별위0.5、1.0、2.5、5.0、10.0、25.0、50 mg·kg-1，대응각처리위TS1~TS7。각협박수평균설치3개평행，동시설치대조TS0。결과표명，황토중저수평적Cd협박가촉진소맥적생장，차재Cd오염수평5.0 mg·kg-1시시오니화미시오니토양중소맥생물량균최대，이고수평적Cd협박억제소맥적생장，차Cd협박수평월고，억제작용월강렬；Cd협박하시용오니가촉진소맥적생장，우기시경협화자립적생장；소맥각부위Cd적함량수토양Cd처리수평적승고이증가차정현저정상관（P<0.05），각부위최대농도분별가이체도：45.32、14.41、9.66 mg·kg-1，차근계>경협>자립，오니적시용능촉진소맥대Cd적흡수；소맥각부위대Cd적부집능력균수착토양Cd협박수평적승고이선증가후감소，오니적시용재일정정도상제고료소맥대Cd적부집능력，각부위부집계수최대분치분별위1.81、0.93、0.51，단대Cd진입소맥근계후향경협화자립적천이영향불현저。
In order to develop new approaches to utilization of sewage sludge, a pot experiment was conducted out for loess and wheat to study the effects of application of municipal sewage sludge on growth of wheat and accumulation and migration of cadmium under stress. There are two sludge treatment levels in the experimental and 8.0 kg test soil or amended with 4.0%sludge were added in each plastic pots. The solution of Cd (NO3)2·4H2O was added in soils with concentration of 0.5, 1.0, 2.5, 5.0, 10.0, 25.0, 50 mg·kg-1, corresponding to each treatment for TS1-TS7. Various stress levels were set up three parallel, and set the control TS0.The results indicated that low stress levels of cadmium in loess can promote the growth of wheat, and biomass of wheat in both soils reached maximum in stress levels of 5.0 mg·kg-1. However, high stress levels of cadmium inhibits the growth of wheat and inhibition promoted with increase of the stress levels. The application of municipal sewage sludge under cadmium stress can promote the growth of wheat, especially is the shoots and seeds;The content of cadmium of various parts of wheat increased with the increase of stress levels and this phenomenon was a significant positive correlation (P <0.05), and the maximum content of cadmium of various parts of wheat were the roots (45.32 mg·kg-1), followed by the shoots (14.41 mg·kg-1), the minimum is seed (9.66 mg·kg-1). The application of sludge can promote the absorption of cadmium in wheat; The accumulation capability of various parts of the wheat first increase and then decrease with increase of stress levels of cadmium. The application of municipal sewage sludge can improve the accumulation ability of cadmium in wheat and the maximum enrichment factor of the various parts of wheat were 1.81, 0.93, 0.51, but the impact on the migration of cadmium which shift from the roots to shoots and seed were not significant.