title: Agronomic use of biotechnologically processed grape wastes.
abstract: Grape waste was composted by biodegradation and subsequently used as an organic fertilizer for 20 day-corn. Combinations of recently compressed grape waste and hen droppings (10% w/w) were prepared to study the activating effect of hen droppings and the effect of aeration on the composting process. The final hydrogen potential (pH), %C, %N and C/N ratio, indicated an adequate development of the bioprocess. Satisfactory results were observed when the products were applied at several doses (1,000-4,000 kg/ ha) as a soil conditioner for corn seed germination in greenhouses. Only the addition of hen droppings had a significant effect (P < 0.05) on corn dry matter (14% increase). A dose of 3000 kg/ha was considered as optimal and was used supplemented with triple superphosphate (TSP) in agronomic trials. All the treatments produced greater corn dry matter (P < 0.05) than the chemical industrial fertilizer used as a control (0.52-0.71 g/pot for the organic fertilizers vs 0.45 g/pot for the control). Anaerobic conditions and hen droppings addition significantly produced (P < 0.05) higher corn dry matter.
authors.affiliation: Biochemical Engineering Department, Faculty of Engineering, University of Zulia, Maracaibo, Venezuela.
authors.forename: J
authors.initials: J
authors.lastname: Ferrer
authors.forename: G
authors.initials: G
authors.lastname: Páez
authors.forename: Z
authors.initials: Z
authors.lastname: Mármol
authors.forename: E
authors.initials: E
authors.lastname: Ramones
authors.forename: C
authors.initials: C
authors.lastname: Chandler
authors.forename: M
authors.initials: M
authors.lastname: Marín
authors.forename: A
authors.initials: A
authors.lastname: Ferrer
mesh_terms: D001673:Biodegradation, Environmental; D011756:Diphosphates / Q000737:chemistry; D005308:Fertilizers; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D009584:Nitrogen / Q000737:chemistry; D010758:Phosphorus / Q000737:chemistry; D011188:Potassium / Q000737:chemistry; D019685:Rosales / Q000378:metabolism*; D013696:Temperature; D013997:Time Factors; D018505:Waste Management
chemical_list: D011756:Diphosphates; D005308:Fertilizers; D007220:Industrial Waste; D010758:Phosphorus; C033414:superphosphate; D009584:Nitrogen; D011188:Potassium