The pot-culture method combined with chemical and statistical analyses was used to get basic data for determination of the food-security indexes related to combined pollution of Cr and phenol in soil-rice systems.Regr...The pot-culture method combined with chemical and statistical analyses was used to get basic data for determination of the food-security indexes related to combined pollution of Cr and phenol in soil-rice systems.Regression analyses according to the experimental result indicated that the critical concentrations of Cr andphenol in brown rice were 0.37 and 0.33 mg kg-1, respectively, under the condition of Cr-phenol combined pollution.展开更多
Due to the mining,smelting,sewage irriga-tion,agricultural runoff,and development ofrural enterprises,combined pollution of Cd andZn in soil-rice systems has frequently oc-curred.This problem was studied by using the... Due to the mining,smelting,sewage irriga-tion,agricultural runoff,and development ofrural enterprises,combined pollution of Cd andZn in soil-rice systems has frequently oc-curred.This problem was studied by using thepot-culture imitative method combined withhemical analysis and mathematical models.展开更多
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 pot-culture method combined with chemical and statistical analyses was used to get basic data for determination of the food-security indexes related to combined pollution of Cr and phenol in soil-rice systems.Regression analyses according to the experimental result indicated that the critical concentrations of Cr andphenol in brown rice were 0.37 and 0.33 mg kg-1, respectively, under the condition of Cr-phenol combined pollution.
文摘 Due to the mining,smelting,sewage irriga-tion,agricultural runoff,and development ofrural enterprises,combined pollution of Cd andZn in soil-rice systems has frequently oc-curred.This problem was studied by using thepot-culture imitative method combined withhemical analysis and mathematical models.
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.
