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VOL. 6, ISSUE 6 (2021)
Consequences of changes in photosynthetic photon flux density (PPFD) and manuring practices on the fodder yield of Azolla pinnata Brown
Authors
Rex Immanuel R, G B Sudhagar Rao, K Boopathi, G Baradhan, S M Suresh Kumar
Abstract
Azolla is one of the most economic and efficient fodder substitutes for livestock, particularly as can be easily digested due to its high protein and low lignin content. However, their continuous supplies throughout the year especially during summer period in the coastal regions are limited. Efficient agronomic strategies may sustain the yield of Azolla. A pot culture experiment was conducted at Annamalai University Experimental Farm, Annamalai Nagar during 2016-2017 to formulate a sustainable Azolla fodder production technology under resource constraint situation. The experiment was laid out in split plot design with three replications. The treatments comprised of three levels of light penetration in main plots which favored various levels of Photosynthetic Photon Flux Density (PPFD) (M1-100% light penetration, M2-75% light penetration and M3-50% light penetration) and nine nutrient management practice in sub plots S1-Without manuring (control), S2- FCM @ 0.2 per cent (v/w basis), S3- FCM @ 0.4 per cent (v/w basis), S4-FCM @ 0.6 per cent (v/w basis), S5- FCM @ 0.8 per cent (v/w basis), S6-EFYM @ 0.2 per cent (v/w basis), S7-EFYM @ 0.4 per cent (v/w basis), S8-EFYM @ 0.6 per cent (v/w basis) and S9-EFYM @ 0.8 per cent (v/w basis). The interaction effect between levels of light penetration and nutrient management practice was found to be significant. Among the different treatment combinations, cultivation of Azolla under 1704.02 µmol/s/m2 (100 per cent light penetration) with addition of EFYM 0.8% on v/w basis favorably recorded the maximum growth characters viz., frond area (425 mm-2 frond-1), density (70,147 m-2), number of days taken to cover 1m2 area (3.98), chlorophyll content (3.94 µg g-1), fresh yield ad dry fodder yield (2,567 and 147 g m-2 week-1, respectively).
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Pages:647-652
How to cite this article:
Rex Immanuel R, G B Sudhagar Rao, K Boopathi, G Baradhan, S M Suresh Kumar "Consequences of changes in photosynthetic photon flux density (PPFD) and manuring practices on the fodder yield of <em>Azolla pinnata</em> Brown ". International Journal of Botany Studies, Vol 6, Issue 6, 2021, Pages 647-652
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