[Effect of limestone and magnesite application on remediation of acidified forest soil in Chongqing, China].
Effect of limestone and magnesite application on remediation of a typical acidified soil under a masson pine (Pinus massoniana) forest at Tieshanping, Chongqing in southwest China was studied through field experiments. The changes of soil water chemistry in different layers within one year after application of limestone or magnesite indicated that the remediation agents leaded to the recovery of acidified soil by significant increase of pH value and concentration of relative cation, i.e., Ca2+ or Mg2+, and notable decrease of inorganic monomeric aluminum (Ali). However, the accelerated leaching of NO3- and SO4(2-) might somewhat counteract the positive effects. Since the limestone powder applied was much finer and thus more soluble than the magnesite powder, it seemed that the addition of limestone was more effective than that of magnesite. However, the application of magnesite could probably improve the nutrient uptake and growth of plant, and thus limestone and magnesite should be used together. The change of soil water chemistry was much more notable in upper layer of soil than lower, which means that it will take long time to achieve the whole profile soil remediation.
Yang
Yong-sen
YS
Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. yangys03@mails.tsinghua.edu.cn
Duan
Lei
L
Jin
Teng
T
Zhao
Da-wei
DW
Zhang
Dong-bao
DB
Hao
Ji-ming
JM
D015258:Acid Rain / Q000032:analysis*; D002119:Calcium Carbonate / Q000737:chemistry*; D002681:China; D052918:Environmental Restoration and Remediation / Q000379:methods; D006863:Hydrogen-Ion Concentration; D008274:Magnesium / Q000737:chemistry*; D028223:Pinus / Q000254:growth & development*; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis* / Q000737:chemistry
D015258:Acid Rain; D012987:Soil; D012989:Soil Pollutants; C005479:magnesium carbonate; D002119:Calcium Carbonate; D008274:Magnesium