The effect of Cd, Pb, Cu, Zn, As combined pollution in soil on the growth of rice paddy and the property of interactive effects for heavy metals were studied with pot experiment. The results showed that the complex fu...The effect of Cd, Pb, Cu, Zn, As combined pollution in soil on the growth of rice paddy and the property of interactive effects for heavy metals were studied with pot experiment. The results showed that the complex function of the elements in soil influnces the growth of rice paddy. Height of rice decreases 4-5cm, while yields of rice decreases 20%-30%. When Cd concentration is 1.5 mg·kg -1 for Cd Cu, Cd Pb, Cd Zn interactive effects, the contents of Cd absorbed by rice increase with the concentration of Pb,Cu and Zn. Cd concentration in rice roots, stalks and leaves,grains increases 31.6%-47.7%, 14.3%-61.5%, 19.6%-78.6% respectively. When Pb, Cu, Zn, As concentration are 300、100、200、30mg·kg -1 respectively, the level of Pb, Cu, Zn absorption in rice roots,stalks and leaves decreases with Cd concentration increasing, Pb, Cu, Zn concentration in root decreased 42.11%, 28.22%, 6.66%,respectively. Pb, Cu, Zn concentration in stalks and leaves decreased 17.69%, 3.75%, 2.54%. The contents of As in root increased 9.85%, the contents of As in stalks and leaves decreased 3.25% respectively. The transformation ability of multi element is higher than single element.展开更多
文摘The effect of Cd, Pb, Cu, Zn, As combined pollution in soil on the growth of rice paddy and the property of interactive effects for heavy metals were studied with pot experiment. The results showed that the complex function of the elements in soil influnces the growth of rice paddy. Height of rice decreases 4-5cm, while yields of rice decreases 20%-30%. When Cd concentration is 1.5 mg·kg -1 for Cd Cu, Cd Pb, Cd Zn interactive effects, the contents of Cd absorbed by rice increase with the concentration of Pb,Cu and Zn. Cd concentration in rice roots, stalks and leaves,grains increases 31.6%-47.7%, 14.3%-61.5%, 19.6%-78.6% respectively. When Pb, Cu, Zn, As concentration are 300、100、200、30mg·kg -1 respectively, the level of Pb, Cu, Zn absorption in rice roots,stalks and leaves decreases with Cd concentration increasing, Pb, Cu, Zn concentration in root decreased 42.11%, 28.22%, 6.66%,respectively. Pb, Cu, Zn concentration in stalks and leaves decreased 17.69%, 3.75%, 2.54%. The contents of As in root increased 9.85%, the contents of As in stalks and leaves decreased 3.25% respectively. The transformation ability of multi element is higher than single element.
