PRODUKTIVITAS PADI SAWAH DEGAN POLA IRIGASI HEMAT AIR

Traditional irrigation system requires around 80% of the available water resources. Huge water applied in paddy rice cultivation is difficult to fullfill in the next future due to increasing demandfbr other non-irrigation needs such as industry and domestic as a result of increasing population. In addition, the water availability tends to decrease especially during dry season. To overcome the conflict among water users in the future, growing paddy rice with less water is urgently needed Number of water saving irrigation (WSI) systems and traditional irrigation (TRI) system are tested in the paddy rice cultivation. Those WSI systems are the alternate wetting and drying (AWD), semi-dry cultivation (SDC), system of rice intensification (SRI) dan modified traditional method (MTR). Results of the WSJ systems in terms of water productivity i.e. ratio between the yield (kg) with total irrigated water (m3) is compared to TRI that currently applied by farmes in paddy rice cultivation. Results show that in terms of agronomic and water aspects, WSJ systems give better yield than traditionil system. Comparing with TRI, under the SDC system productive tillers and the ,yields increased by 9.7% and 125%, respectively, The SDC and AWD systems could save water up to 38.6% and 34% relative to TRI. The highest water productivity is obtained under SDC system (2.68 kg/ m3) followed by AWD (2.55 kg/ m3), MTR (1.27 kg/ m3) and TR1 (0.79 kg/ m3)