Impacts of nutritional status of bio-solids on corn (Zea mays L.) used in agriculture
Paper Details
Impacts of nutritional status of bio-solids on corn (Zea mays L.) used in agriculture
Abstract
The main objective of the present study was to investigate the fertilizer field value of seven different types of biosolids including lime stabilized, composted, liquid mesophilic anaerobically digested (MAD), thermally dried mesophilic anaerobically dried, thermally hydrolyzed mesophilic anaerobically digested, dewatered mesophilic anaerobically digested and thermally dried raw biosolids. They were analyzed for their nutrient contents and were tested for their fertilizer value for corn (Zea mays) in field trials. The type and amount of different biosolids had significant impact on the fresh and dry weight yields of corn. Growth parameters including plant height, stem diameter and leaf area were also significantly different among different types of biosolids. Highest amount of total Nitrogen (N) was found in dewatered cake. Most of it was ammonium-N. In contrast, thermally treated biosolids had the lowest total N content. The amount of Phosphorus (P) was also analyzed in different biosolids and it was highest in liquid Mesophilic Anaerobic Digestion (MAD) and dewatered biosolids at the rate of 2.35% and 2.32% respectively. The results indicated that the yield of the crop was positively related with the increasing amounts of biosolids.
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