AMELIORATION OF THE ADVERSE EFFECT OF DROUGHT ON RICE CULTIVATION THROUGH POULTRY LITTER BASED COMPOST

Abstract

A field experiment was carried out at the research field of Crop Physiology and Ecology Department, Hajee Mohammad Danesh Science and Technology University, Dinajpur during January 2017 - May 2017 to evaluate the effects of poultry litter based composts on morphophysiological, yield and yield contributing characters of rice (BRRI dhan28) under different watering stress condition. The experiment was laid out in two factorial complete randomized designs (CRD) with three replications. Factor A included three (3) fertilization levels i.e. control (inorganic), compost (10ton/ha) + inorganic, compost (20ton/ha) + without inorganic fertilizers and factor B comprised of three watering levels (continuous flooding, 100% field capacity and 75% field capacity). Different parameters were measured such as plant height, tiller number, leaf number, leaf area, chlorophyll content, proline content and yield contributing characters during the experiment. Most of the morphophysiological traits, yield and yield contributing characters were significantly influenced by different fertilization and irrigation levels. Especially the highest plants height and leaf number per hill were recorded in compost (10ton/ha) + inorganic fertilizer with 100% field capacity. But the maximum tiller numbers were produced by the interaction of control (inorganic) with flooding irrigation. The total chlorophyll and proline content were observed more in flag leaf by the interaction between controls (inorganic) with flooding irrigation. But the relative water content was found more by the interaction of compost (10ton/ha) + inorganic fertilizer with 75% field capacity. The highest effective tiller number/hill was recorded from control (inorganic) and (20ton/ha+without inorganic) at anthesis and harvest stages. It was also observed that flooding irrigation produced the highest number of effective tiller/hill. But the combination of control (inorganic) with flooding irrigation produced the highest number of effective tiller/hill (19). The longest panicle length (23.12 cm) was recorded from the combined effect of compost (10ton/ha + inorganic) with 75% field capacity. The highest grain yield was recorded from control (inorganic) viii (3.69 ton/ha) and flooding irrigation (4.08 ton/ha). The interaction between compost (10ton/ha+ inorganic) and flooding irrigation gave the highest grain yield (4.42 ton/ha). In case of 1000-grain weight the combined effect of compost (20ton/ha+ without inorganic) with 75% field capacity produced the highest result (18.83 g). The maximum harvest index was recorded from compost (20ton/ha + without inorganic) with flooding irrigation. It will be concluded that the rice grown under 10ton/ha compost + inorganic fertilizer with flooding irrigation revealed as a pledged practice in order to get the optimum yield.