 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Influence of Heavy Metals and Soil Amendments on Vetiver (Chrysopogon zizanioides) Grown in Zinc Mine Soil) ผู้เขียน: ดร.นวลฉวี รุ่งธนเกียรติ, ศาสตราจารย์ , นายยงยุทธ โอสถสภา, รองศาสตราจารย์ ,  เจริญ ยินดีรัมย์ สื่อสิ่งพิมพ์:pdf AbstractSoil amendments, such as compost and chelating agents, are often required to improve phytoremediation efficiency. In this study, the Ratchaburi vetiver ecotype was grown in soil uncontaminated by heavy metal and in zinc mine soil amended with compost and chelating agents (EDTA and DTPA). It was found that the concentration of Zn in the mine soil was about 5.6 times higher than the toxic level in soil. It inhibited vetiver growth as well as causing leaf chlorosis which was a symptom of either Zn toxicity or iron deficiency. The application of compost had no influence on growth performance, primary nutrient uptake and heavy metal uptake. EDTA could enhance the concentration and uptake of Zn, Mn and Cu, but not Fe, while DTPA increased the concentration of these heavy metals, but not their uptake. The compost and chelating agents did not affect Mn or Zn translocation. However, they could elevate Fe and Cu translocation, especially when compost was applied together with chelating agents of which EDTA and DTPA gave significantly-different results. In summary, EDTA was superior for soil amendment in a zinc mine soil with high concentrations of multi-heavy metals. |
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หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Soil Amendment on Growth and Heavy Metals Content in Vetiver Grown on Iron Ore Tailings) ผู้เขียน:ดร.นวลฉวี รุ่งธนเกียรติ, ศาสตราจารย์, นายยงยุทธ โอสถสภา, รองศาสตราจารย์, เจริญ ยินดีรัมย์ สื่อสิ่งพิมพ์:pdf AbstractA greenhouse experiment was conducted to evaluate the effects of soil amendment on growth, performance and the accumulation of primary nutrients as well as Fe, Zn, Mn and Cu in vetiver. Ratchaburi vetiver ecotype plantlets were planted on iron ore tailings amended with compost and chelating agents (EDTA and DTPA). The results indicated that iron ore tailings contained high concentrations of heavy metals with total Fe, Zn, Mn and Cu concentrations of 63,920, 190, 3,220 and 190 mg kg-1, respectively and low contents of primary nutrients and organic matter. The combination of soil amendment materials, especially DTPA and compost, was more effective than sole chelating agents and sole compost in enhancing vetiver growth, nutrient and heavy metals uptake. The soil amendments used in this study did not affect Fe and Zn translocation from vetiver roots to shoots. However, chelating agent amendment could increase Cu translocation, especially in combination with compost, while it slightly decreased Mn translocation. The average mean translocation factors of Mn, Fe, Zn and Cu were 0.86, 0.71, 0.69 and 0.55, respectively. These results indicated that vetiver is a potential plant for phytostabilization and rehabilitation of iron ore mine areas. |