The main objectives of this research were to determine the effects of ameliorant supplementation on rice root and shoot morphology under water deficit, by studying the impacts of soil conditioners on soil chemical properties. The experiments were arranged in split plots with duplicates for one season in the greenhouse. The treatments consisted of two different types of soil ameliorants and a hybrid mixture of substrates which were natural zeolite, GFOC, hybrid (natural zeolite + GFOC), and control treatments. All the treatments received 60% of water capacity; except for the non-treatment (control) which received 100% of water. The soil chemical properties were observed along with physiological traits of rice root and shoot, including survival rate (%), length (cm), and dry weight (g) of root and shoot of rice crop. It was found that soil chemical properties of the hybrid supplement were within the optimum range with pH 7.42, 4.23% of organic matter, and 121.3 mS/m of electrical conductivity which indicated that plant rice with hybrid is the most effective treatment among the others with the survival rate of 95.3%, has the longest root–shoot length of 69.4 cm and the heaviest root–shoot weight of 64.4 g. The hybrid treatment also demonstrates a strong positive relationship between rice crop morphological features and soil productivity. Therefore, soil ameliorant is proven to boost soil productivity and plant growth by reducing the adverse effects of drought stress.
