EFFECTS OF CALCIUM OXIDE AND WASTE OIL ON SOME GROWTH INDICATORS, CHLOROPHYLL AND LEAF RELATIVE WATER CONTENT OF CONOCARPUS ERECTUS L.

The main problem of area near the oil regions is pollution of waste oil. Due to this event, cultivation will be difficult and then agricultural areas gradually will change to unusable lands. In order to evaluate phytoremediation rate, increasing resistance, waste oil concentrations and calcium oxide levels of Conocarpus erectus L. were studied. In this research, effects of waste oil 0, 5, 10, 15 and 20 ml kg-1 soil), calcium oxide (0, 2.5, 5, 7.5 and 10%) were evaluated on four leaves seedlings. The results showed that despite of the relative tolerance of seedlings to the waste oil, increasing effluent oil concentration to 20 ml, significantly decreased vegetative traits such as stem length, root length, shoot dry weight and root dry weight. In addition, 20 ml kg-1 waste oil reduced 3.3% leaf relative water content. In comparison of control, chlorophylla reduced 19% at 5 ml kg-1. Whereas, increasing waste oil to 20 ml kg-1 enhanced chlorophylla to 13.6% compared with the control. According to the results, chlorophyllb increased in all levels of waste oils. The highest concentration of waste oil elevated chlorophyllb to 47.9% more than that of control and the total chlorophyll only significantly reduced in waste oil level of 5 ml kg-1 compared with the control. On the other hand, calcium oxide enhanced stem length, root length, root to shoot length ratio, shoot dry weight, root dry weight and shoot dry weight to root dry weight ratio. Calcium oxide treatments also improved leaf relative water content and chlorophylla&b and total chlorophyll.