DYNAMIC OF PRODUCTIVITY IN LOWER MANAIR DAM (LMD) AND KAKATIYA CANAL (KC) KARIMNAGAR, ANDHRAPRADESH, INDIA

Primary productivity (Gross and Net) and respiratory consumption in Kakatiya Canal and Lower Manair Dam was carried out during July 1999 to June 2001 and recorded the maximum gross primary productivity at site-V (0.663 g/cm3/h) and minimum at site-VIII (0.120 g/cm3/h). In general the maximum gross primary productivity values were during summer months. The minimum and maximum net primary productions were at site-I (0.060 g/cm3 /h) and (0.301 g/cm3/h) with an average value of 0.153 g/cm3/h. The net primary production values were positive in all the sites which explains photosynthetic activity of production is dominant over respiratory consumption. The average respiratory consumption values were 0.120, 0.135. 0.115 and 0.120 g/cm3/h in sites 1, 11, 111, and IV. The P/R ratio fluctuated between 0.70 to 5.003 during 1999 to 2000 while it was 0.749 to 4.682 during 2000 to 2001.