Diatomite and re-use coal waste as promising alternative for fertilizer to environmental improvement
2015
Mohammad Hassan Sayyari-Zahan, AbdolHamid Gholami, Somayeh Rezaeepour
Application of conventional fertilizers has been contributing much pollutant to the environment. This study aimed to assess the potential of diatomite and re-use coal waste as a non chemical fertilizer to environmental improvement. The experiments were evaluated in 2kg pots under greenhouse conditions at 4 levels of diatomite powder including 0, 10, 20, 40 g/kg soil as well as 5 levels of coal waste powder including 0, 20, 40, 80, 160 g/kg soil based on completely randomized design with three replications. Treatments of diatomite and coal waste were mixed well and kept under field capacity moisture for 4 months. The results showed that the effects of diatomite and coal were significant on EC, K and P concentrations in soil while the coal waste showed more influenced on decreasing of soil pH. Adding diatomite up to 40 g/kg in soil increased EC, K and P viz. 2.92, 1.19 and 1.54 times respectively compared to control sample. Using of 160 g/kg of coal in soil increased EC (2.89 times) and decrease pH (1.06 times) which had led to increased availability of trace elements that enhance plant growth. The highest bio-available concentrations of K and P in soil obtained at 80 and 40 g/kg of diatomite and coal waste respectively. This study demonstrates that a good fertilizer can be produced by using diatomite and coal waste; however, further research is required.
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