Chemical and Microbiological Aspects of Soil Amended with Citrus Pulp

Sustainable Use of Citrus Waste as Organic Amendment in Orange Orchards

“…Taking into account the other soil parameters, results suggested that the CW application as amendment, positively affect soil chemical fertility by increasing the organic matter supplied to the soil (Figure 3A,B). Our results are in accordance with those reported by [38], which found an increase in the soil organic matter, as well as an improvement of microbial biomass activity and the stimulation of soil enzymatic activity. The increase in the soil organic matter was directly related to the amount of CW added, and led to a notable mineralization process characterized by different times dependent on the treatment.…”

“…Acetic bacteria are important to the industry for the production of vinegar, cellulose, gluconic acid and sorbose. In addition, in orange peels, the presence of the high concentration of carbohydrates, vitamins and nutrients triggers and promote the dynamics of microbial activities [38,54]. In detail, [38] showed that the incorporation of CW as soil amendments increased the soil organic matter despite the notable mineralization process occurring in the short term due to the citrus fruit industry residues.…”

“…In addition, in orange peels, the presence of the high concentration of carbohydrates, vitamins and nutrients triggers and promote the dynamics of microbial activities [38,54]. In detail, [38] showed that the incorporation of CW as soil amendments increased the soil organic matter despite the notable mineralization process occurring in the short term due to the citrus fruit industry residues. However, in the medium term of 2 years, the chemical-spectroscopic characterization of the organic compounds in the soil were shown to be very similar to the natural humic substances.…”

Humic-like substances from agro-industrial residues affect growth and nitrogen assimilation in maize (Zea mays L.) plantlets

“…The D-HL and L-HL values obtained are higher than those reported by Pandeya (1992) and Prasad and Sinha (1984) for humic-like substances from farmyard and poultry litter, respectively (TA about 11.5 meq g -1 ). The value obtained for R-HL is comparable to those determined for humic-like acids extracted from cattle manure, citrus-pulp, municipal solid waste and composted herbaceous material (Piccolo et al, 1992;Meli et al, 2007;Garcia et al, 1989;Hammouda and Adams, 1987). Finally, a value similar to that found in humic-like acids extracted from sewage sludges (TA about 8.0 meq g -1 ; Garcia et al, 1989) was obtained for B-HL.…”

The Effect of Citrus Pulp Amendment on Sunflower Production and the Dissipation of the Herbicide Aclonifen

“…In all cases, there was a first-order degradation kinetics with r 2 values above 0.98%. This result suggests that, in field conditions, the addition of compost does not influence either the bioavailability of the molecule or the biodegradation process which should be stimulated by the increase in microbial activity following on from the addition of the organic matter (Meli et al, 2007).…”