The effects of exogenous La on the fertility parameters such as cation exchange capacity (CEC), exchangeable basic cations, and exchangeable acidity in red soil and paddy soil were studied with soil column simulation. The results show that with increasing amount of the added La, the proportion of exchangeable La in soils increases and there is more exchangeable La in red soil than in paddy soil. When the concentration of La is more than 600 mg*kg-1, the proportion of exchangeable La almost remains constant. When the concentration of La is less than 1200 mg*kg-1, there is no significant effect on CEC in red soil. But when the concentration of La is more than 1200 mg*kg-1, it has significant effect on CEC in paddy soil. The application of La resulted in increasing exchangeable aluminum, Ca and Mg in soil solution, and decreasing exchangeable Ca and Mg retained in soils. But when the concentration of La is less than 150 mg*kg-1, it has no significant influence on CEC, exchangeable Ca and Mg, and exchangeable acidity in red soil and paddy soil.
参考文献
| [1] | GuoBS;XIONG B K;Hu C P et al.Latest advances of REEs on the application in agriculture and animal husbandry[J].稀土,2002,15(06):37-43. |
| [2] | Zhu J G;SUN X M.Safety Evaluation of Rare Earth Elements on their Agricultural Use and Field Investigation in Red Soil Area. In the Ecological Experimental Station of Red Soil, the Chinese Academy of Sciences(ed.)Research on Red Soil Ecosystem[M].北京:中国农业科技出版社,2002:179-182. |
| [3] | CHEN Z X;WANG X R;Tian L Q et al.The accumulation of rare earth elements in soil and tee tree[J].中国环境科学,2002,15(02):145-147. |
| [4] | Zhu W M;ZHANG J Z;ZHANG L G et al.Numerical simulation of RE migration in soils[J].中国稀土学报,2002,14(04):341-346. |
| [5] | Institute of Soil Science.Chinese Academy of Sciences ed.). Soil Physical and Chemical Analysis[M].上海:上海科学技术出版社,1978:169. |
| [6] | Liu Z.Rare earth elements in soils[M].Nanjing: Jiangsu Science and Technology Press,1996:293-311. |
| [7] | GILLMAN G P;SUMNER M E .Surface characteristics and soil solution composition of four soils from the Southern Piedmont in Geogia[J].Soil Science Society of America Journal,1987,51:589-594. |
| [8] | Derome J.;Lindroos AJ. .Effects of heavy metal contamination on macronutrient availability and acidification parameters in forest soil in the vicinity of the Harjavalta Cu-Ni smelter, SW Finland[J].Environmental Pollution,1998(2):225-232. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%