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image of Israel Journal of Plant Sciences

Field trials were conducted to determine the effect of algal biofertilizers (Aulosira fertilissima and Anabaena doliolum), alone or in combination with different doses of N-fertilizer (0–120 kg N/ha) supplied as urea, on biomass yield and nutritive value of rice. All doses of N-fertilizer, together with A. fertilissima or A. doliolum, significantly increased plant height, number of tillers/hill, root length, leaf length, chlorophyll content, number of panicles/hill, number of seeds/ear, seed weight, grain yield, protein, and N content of grain. However, lower doses of N-fertilizer resulted in more efficient and rapid responses. Maximal qualitative improvement in rice production was found with 90 kg N/ha together with 12.5 kg/ha algal biofertilizer. The responses to these biofertilizers appear to be strain-specific since application of A. fertilissima yielded better results than application of A. doliolum. Application of the former saved about 25% of the chemical N-demand of the crop.

Affiliations: 1: Council of Science and Technology, Uttar Pradesh ; 2: Center of Advanced Study in Botany, Banaras Hindu University


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