INFLUENCE OF SEED SOURCE ON PLANT GROWTH, YIELD AND YIELD GAP OF RICE (ORYZA SATIVA L.)

Seed source is influenced on plant growth and yield of a crop. The objective of this research was to investigate the plant growth and yield including gap of rice collected seed from different sources in Bangladesh. The seed of rice variety BRRI dhan28 of Oryza sativa L. was used as study material. The treatments were consisted of four sources of seed viz. Bangladesh Agricultural Development Corporation (BADC), private seed company, farmers’ own seed and seed from local market. The seed was also obtained from Bangladesh Rice Research Institute (BRRI) that was used for control. Data regarding plant growth parameters (plant height, leaf area, absolute growth rate, AGR and relative growth rate, RGR); yield attributes (number of spikelet/panicles, 1000-grain weight and yield/ton); and percentage of yield gap were investigated. Minimum plant growth parameters except RGR and all yield attributes of rice were observed in the seed of BRRI followed by BADC; while the highest RGR was observed in the seed of BRRI and BADC simultaneously. The yield gap of rice was the highest in the seed of the market. The plant growth and grain yield of rice were comparatively higher in the seed of BRRI followed by BADC and company due to higher knowledge of seed production and processing technology; while higher yield gap were observed in the seed of farmer and market due to poor seed production and processing facilities as well as their poor knowledge.