Effects of reused perch groundwater on growth and yield of forage halophytes on discharged lowland   Manop Tuntatameya   ABSTRACT        Shallow groundwater table is a factor affecting land salinization which could be drawn down by pumping or through transpiration by plants. The methods were integrated in this experiment and the expected outcomes are three folds viz: exposure of salt water, forage biomass and desalinization. The trial was conducted at Kham Tale So District 20 km southwest of Korat during October 1994-1995.      The discharge of shallow well was 26 l/min., pH=8 and salinity is 2.5 dS/m. Grasses for trial were Spartina partens, Sporobolus verginicus , Leptochloa fusca, Panicum repens and Cynodon dactylon. Comparing under irrigated and rained conditions.      The results were in dry season Spartina and Sporobolus standing better than Panicum and Cynodon in both conditions of rained and irrigated, but in rainy season Panicum and Cynodon were better than Spartina and Sporobolus, espectally when blending well water with rain water. Under rained Sporobolus was the best.        Keywords : ground watertable, land salinization