GROWTH OF RICE (ORYZA SATIVA L.) AS INFLUENCED BY DIFFERENT WATER REGIMES

Growth performance of two varieties viz. "Kranti" and "Kalimunch" of rice (Oryza saliva L.) under different water regimes was studied. Height of the plant, number of tillers per plant, number of leaves per plant, root length, fresh weight of aerial plant part and root part and dry weight of root decreased in both the varieties supplied with water one day after draniage of ponded water.

Chlorophyll contents in leaves decreased in "Kranti" plants supplied with water one day after the drainage of flooded water. Survival of plants is considerably reduced in restricted water supply conditions in both the varieties. Available nitrogen content in soil is more in plots with restricted water supply than the plots maintained with plants in continuous submerged condition. This may be due to reduced uptake of nitrogen in plants raised on plots with limited water supply. However, this requires further sub-stantiation.