Then, the growth parameters (plant height, tiller number, shoot dry weight and root dry weight), and yield parameters (penicle number and grain weight), were measured during harvesting time. On the other hand, liquid extract (5%) was applied directly to growth media. Liquid extract (10%) was sprayed during vegetative growth of the plants. This article reports effect of solid and liquid extracts on growth and yield of rice plants. This is due to the fact that liquid extract contains phytohormone, and solid extract contains essential elements, stimulating growth and production of plants. Many authors report that macroalgae is an important source of organic biostimulant and biofertilizer. Therefore, the use of organic ferlizer is increased recently. The excessive use of ingonaic fertililizer in agriculture system production reduces soil fertility and polluted out environment.
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