Study of sewage sludge use in agriculture and its effect on plant and soil

Abstract

The plant macro and micro nutrients as well as organic matter make sludge disposal in soil an attractive option. Nitrogen has received most attention and it is normally the most abundant sludge nutrient. One of the best alternatives to waste disposal is through the soil-plant system as a fertilizer. Based on properties different wastes can be co-recycled in order to take simultaneously the best profit and minimize environmental pollution .An experiment was carried out with a calcareous soil. Using six different doses of a sewage sludge were treated. A crop barley (Hordium Vulgare, Giza 123 ) was grown in the amended soils. The application of sewage sludge to the calcareous soil lowered the pH of the soil, although the value always around 7.75-7.9 at the end of the experiment. In the barley plants it was observed that the higher the yield, the higher the nitrogen contents. Electrical conductivity rose with organic amendment. Also it improved the nutrient level of the soil, particularly nitrogen and available phosphorus.

Evaluation of Sewage Sludge Effects on Soil Properties, Plant Growth, Mineral Nutrition State, and Heavy Metal Distribution in European Larch Seedlings (Larix decidua)

“…This domestic effluent treatment also produces sewage sludge (SS) which is still up to now used as source of macro-and micronutrients for agricultural lands [1,2]. Land application of SS may have many beneficial effects because it improves soil physical properties and increases soil organic matter content which represents several advantages for crops production [2,3]. However, an excessive spreading also leads to a soil contamination with heavy metals (HMs) and/or with some organic pollutants usually contained in sludge.…”

Documentation on Enhancing Nutrient Uptake and Yield of Rice with Application of Sewage Sludge and Different Fertility Levels on Sodic Vertisols

“…Maximum uptake of nitrogen (27.85 kg ha -1 ) by grain was found with 125% RDF which was at par with 100% RDF. Ahmed et al, (2010) reported that the application of sewage sludge to the calcareous soil lowered the pH of the soil, although the value always around 7.75-7.9 at the end of the experiment. In the barley plants it was observed that the higher the yield, the higher the nitrogen contents.…”

Municipal sludge: an effective soil supplement for improving plant growth

“…Alternatively it is used in land reclamation, forestry, horticulture, landscaping, energy and resource recovery (Ahmed et al 2010). Recently, its usage in agriculture has been suggested as one of the eco-friendly option for its disposal (Singh and Agrawal 2010;Ríos et al 2012).…”