Fitriani2013-06-272013-06-272013-06-27sumarnihttp://repository.unri.ac.id:80/handle/123456789/3971This research was conducted from October until November 2012 at Environmental Quality Cultivation Laboratory Fisheries and Marine Science Faculty of Riau University. The purpose of this study was to determine the abundance of zooplankton in the red-yellow podzolic soil (PMK) with Liming. The research method used was experimental method and RAL the alienation between experiment without liming (I) and with liming (II). According to the needs of liming appropriate table Boyd (1979) is : O1 (age pond of 0 – 5 years old), O2 (age pond of 6 – 10 years old), O3 (age pond of 11 – 15 years old), O4 (age pond of 16 – 20 years old). The results showed that there were 10 species of zooplankton of 4 species of Protozoa, 1 species of Rotatories, 3 species of Crustacean and 2 species Insect respectively. The peak abundance population was reached at 10th day for trial I, whereas in trial II at 2th day. Highest abundance on trial II was on treatment O4 (16 – 20 years old) was 37.509 in/l, and the lowest was on treatment O4 (16 – 20 years) of 25.833 ind/l. Water temperature 26-320C, pH (7,1-7,3), DO 3,02-3,49 mg/l, nitrate 0,23-0,30 mg/l.otherZooplanktonsoil red-yellow podzolic (PMK)liming CaCO3student Paper Post Degree