|
Author(s): |
Yaoping Chen, School of Earth and Environment Science, Anhui University of Science and Technology, Huainan, China, 232001
Jiaping Yan, School of Earth and Environment Science, Anhui University of Science and Technology, Huainan, China, 232001
Guangquan Xu, School of Earth and Environment Science, Anhui University of Science and Technology, Huainan, China, 232001 |
|
Abstract: |
Panyi colliery subsidence area was chosen as test site and fly ash from Tianji power station wastaken as test materials. Three different covering thickness test fields are designed, including height of 20cm,30cm and 50cm. The indexes are chosen, such as volume weight, texture, moisture content, pH, organicmatter, total nitrogen, available phosphorus and rapidly-available potassium, and the variation of soilphysical-chemical properties is analyzed. Test results show that fly ash can improve the capillary porosity ofSandy loam; the change of PH value in three kinds of covering thickness fields are not obvious; ash layerhave good water storage capacity. Compared with "soil fertility index classification", the average level oforganic matter in top soils is Grade Ⅱ or Ⅲ; organic matter in ash layers comes to Grade Ⅰ; the averagelevel of total nitrogen in top soils and ash layers get to Grade Ⅲ or Ⅰ; the average level of effectivephosphorus in all layers are Grade Ⅲ; the average level of rapidly-available potassium in all layers comes toGradeⅠ.
|