TY  - SER
AU  - Gammal,M.A.M.
AU  - Al-Kenawy,D.A.R.
TI  - Environment-friendly biomaterial (rice straw extract) for controlling the cyanobacterium Microcystis aeruginosa in natural water in Abbassa and ryan water in Egypt
KW  - Microcystis aeruginosa
KW  - rice straw
N1  - Includes reference
N2  - Rice straws which are otherwise an agricultural waste product and the burning of straw causing the black cloud in Delta Egypt may be an environmentally friendly and sustainable source of a bioalgicide. The algicidal effects of the rice straw extract on the growth of Microcystis aeruginosa were investigated using cultured two isolate RYAN isolate and CLAR isolate in specific media and natural water (CLAR pond water, RYAN pond water and RYAN lake water ) the experiment carried out at plankton room temperature 26±2 with 14 h:10 h light dark photo period . The growth of Microcystis aeruginosa was inhibited by rice straw extract concentrations at 0.1, 0.5, 2.5, and 12.5 mg-1-l in specific media and inhibited at concentration 0.1, and 0.5 in natural water. All four treatment concentrations of the rice straw extract, the number of M. aeruginosa cells was significantly reduced during the 10-day test period (P < 0.05). The growth inhibition of M. aeruginosa with 12.5 mg l-1 of the rice straw extract was higher than that with the other extract concentrations in two isolate. No significant difference was found between the other treatment concentrations. Three natural water from two field ponds and the Rayan Lake were used to test the algal growth inhibition over a period of 10 days. The reduction growth of Microcystis aeruginosa was increase with time of experiment increase, it was more than 70% from control. The results suggest that the rice straw extract may serve as environmentally friendly agents for controlling the growth of toxic Microcystis aeruginosa in natural water
UR  - http://nile.enal.sci.eg/EALE/2009/AIJA/09C/SI/171.pdf
ER  -