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Effect of organic fertilization on the yield and chemical composition of Azolla filiculoides

Abstract:

Tthe advantage of aquatic species is the high production of foliage, the high protein content and the decontaminating capacity of these plants as a waste treatment pathway. The present investigation was developed between the months of January - March of 2012, in the UBPC Guamo Viejo, Río Cauto, Granma; with the objective to evaluate the effect of organic fertilization on the yield and chemical composition of Azolla filiculoides. A completely randomized design was used, with six replicates. To do this, 18 ponds were built manually and directly on the ground, with the following dimensions: 1,25 m long; 0,80 wide and 0,25 deep; fertilization was performed every seven days (with pig excreta in proportions of 0, 560 and 660 g), the sowing density was 25 g / m2 and harvest cycles every seven days. The response variables were dry and fresh biomass, as well as the chemical composition (MS, PB, Ca and P). The best great weight response was of 549,05 and final dry of 41,95. It is concluded that the use of organic fertilization with pig excreta in A. filiculoides allows reaching adequate yields and nutrient content in its vegetative material.