Journal
ECOLOGICAL ENGINEERING
Volume 184, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.ecoleng.2022.106769
Keywords
Biowastes; Olive mill wastewater (OMW); Date palm waste compost; Soil chemical composition; Soil layers; Organic matter; Phenolic compounds; Humic acid; Fulvic acid
Funding
- EU
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The combined agronomic application of olive mill wastewater (OMW) and compost in an olive field in Tunisia has been shown to increase the organic matter and nutrient content of the soil, as well as improve the accumulation of phenolic compounds.
The effects of combined agronomic application of olive mill wastewater (OMW) with compost were evaluated in an olive field (Tunisia). Four treatments were used. The first plot was spread by 50 m3 ha-1 of OMW, the second treated with 5 T ha-1 of compost, the third amended by both (50 m3 ha-1 + 5 T ha-1), and the fourth, used as a control. After ten days of organic amendment, the soil upper layers presented the highest organic matter (OM), total nitrogen, available phosphorus, exchangeable potassium and sodium contents, with the highest values noted for the mixed treatment. Also, this treatment exhibited the most important soil phenolic concentrations accumulation. All organic fertilizing treatments produced significant increase in the total alkali-extractable humic carbon (HEC), humic acid carbon (HAC) and fulvic acid carbon (FAC) concentrations, especially with OMW and compost applied simultaneously.
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