Abstract
We investigated the fertilizing potential of three agro-industrial wastes (Compost (C), Dehydrated Manures (DM) and Digestate (D)) on soil properties, on seeds germination and the plants growth. Results showed that the addition of wastes modified several soil properties as pH, Electrical Conductivity (EC), Water Retention Capacity (WRC) and Soil Organic Matter (SOM). Hence, SOM increase from 1.5% in unamended soil to 2, 2.3 and to 3.1% in soils amended with (D), with (DM) and with (C) respectively. A fast SOM biodegradation was illustrated in presence of compost where we noted a decrease of 20% of initial organic matter content. Besides, wastes improve strongly microbial and respirometric soil activities mainly in presence of DM and D. These same wastes stimulate seeds germination of two standard plants species (Tomato (Lycopersicon esculentum) and Alfalfa (Medicago sativa)). The growth levels of three cultivated plants species (Wheat (Triticum durum), Sorghum (Sorghum bicolor) and Alfalfa (Medicago sativa)) were enhanced in presence of wastes than those irrigated with water.
Highlights
The use of organic wastes as compost, digestate and manures in agriculture could help fight against landAddition of organic materials of various origins has been one of the most common rehabilitation practices to improve soil properties (Weber et al, 2007). Celik et al (2004) reported that organic matter addition improved soil aggregation, water-holding capacity, hydraulic conductivity, bulk density, the degree of compaction, fertility and resistance to water and wind erosion. Weil and Magdoff (2004) established that soil organic matter is crucial source of nutrients for the microflora, microfauna and plants.the massive use of chemical fertilizers and degradation
The rate of NH4+ is lower the upper limit recommended for mature compost which is 400 mg.kg−1
Soil biochemical properties can be greatly affected by the addition of organic amendments
Summary
The use of organic wastes as compost, digestate and manures in agriculture could help fight against landAddition of organic materials of various origins has been one of the most common rehabilitation practices to improve soil properties (Weber et al, 2007). Celik et al (2004) reported that organic matter addition improved soil aggregation, water-holding capacity, hydraulic conductivity, bulk density, the degree of compaction, fertility and resistance to water and wind erosion. Weil and Magdoff (2004) established that soil organic matter is crucial source of nutrients for the microflora, microfauna and plants.the massive use of chemical fertilizers and degradation. The use of organic wastes as compost, digestate and manures in agriculture could help fight against land. Addition of organic materials of various origins has been one of the most common rehabilitation practices to improve soil properties (Weber et al, 2007). Celik et al (2004) reported that organic matter addition improved soil aggregation, water-holding capacity, hydraulic conductivity, bulk density, the degree of compaction, fertility and resistance to water and wind erosion. According to Weber et al (2007), good agricultural practices involve frequent applications of organic fertilizers as well as different kinds of compost. Annabi et al (2007) reported that crop residues, manures and compost from organic wastes have been used to intensification of cropping systems result in depletion of improve soil physical properties in croplands
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