DBPapers
DOI: 10.5593/SGEM2016/B32/S13.049

THE EFFECT OF AN ORGANIC FERTILIZER MADE BY THREE ORGANIC WASTE RECYCLING ON THE GROWS AND PRODUCTIVITY OF CORN

R. Lacatusu, A.R. Lacatusu, R. Capatana, I.R. Moraru, A. Vrinceanu
Wednesday 7 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-62-9 / ISSN 1314-2704, June 28 - July 6, 2016, Book3 Vol. 2, 371-378 pp

ABSTRACT
Compost made by recycling of three wastes: farmyard manure, sewage sludge from wastewater treatment and marine algae, respectively, is presented. Composting process was conducted in type Könemann cubes, finally being obtained a compost with C / N ratio value of 14.6, approaching that of a normal soil, and having high levels of macronutrients (N, P, K) normal of microelements (Cu, Zn, Fe, Mn), and devoid of large amounts of toxic heavy metals (Cd, Cr, Ni, Pb). The fertilizing properties of compost were been tested with corn plants both in climate room and in the field. This paper presents the results of the field experience. Three compost formulas consisting of different proportions of the three wastes were carried out, namely: (1) 50% farmyard manure + 25% sewage sludge 25% marine algae; (2) 50% sewage sludge + 25% farmyard manure + 25% marine algae (3) 50% marine algae + 25% farmyard manure + 25% sewage sludge. A field experiment conducted to test the effects on the plants included experimental variants derived from the application of different doses of each compost formula, namely 25 t/ha; 50 t/ha and 100 t/ha. For each variant were set up three repetitions. In addition to biometric measurements of corn plants, nutrient content of the leaves collected during the vegetation has been analyzed. Assessing the results obtained into variants fertilized with compost was made by comparison with those recorded in two control variants: one without fertilization and other conventionally fertilized with mineral fertilizers. The best results of the corn yield have been recorded in the variant fertilized with compost made up of 50% marine algae, 25% sewage sludge, 25% farmyard manure applied at a dose of 100 t / ha, for which was revealed an increase of 2.5 times as compared to the unfertilized and 1.8 times to the mineral fertilized control variants.

Keywords: organic fertilizer, compost, corn, yield

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