SOIL CARBON AND NITROGEN DYNAMICS IN DEGRADED SOILS RECLAIMED USING STABILIZED ORGANIC AMENDMENTS | ||
| Journal of Agricultural and Environmental Sciences | ||
| Volume 23, Issue 1, April 2024, Pages 104-126 PDF (336.5 K) | ||
| Document Type: Full research articles | ||
| DOI: 10.21608/jaesj.2024.283261.1163 | ||
| Authors | ||
| Emad Aboukila* 1; Ashlee Dere2; Richard Stehouwer2 | ||
| 1Department of Natural Resources and Agricultural Engineering, Faculty of Agriculture, Damanhour University, Egypt | ||
| 2College of Agricultural Sciences, Penn State University, USA | ||
| Abstract | ||
| Organic carbon (C) and nutrients in manure can enhance the quality of degraded soil if they are sequestered in the soil. This improvement could be facilitated by applying manure mixed with a high carbon material or by composting the manure. To identify labile and stable nitrogen (N) and carbon C fractions in degraded soil connected to different treatments, a lab incubation experiment was conducted. Treatments included lime plus mineral fertilizer, two levels of compost and two levels of manure combined with paper mill sludge to achieve C:N ratios of 20:1 and 30:1. The treatments were added to degraded soil and immediately incubated. Data revealed that using organic amendments instead of lime and fertilizer was more effective in creating large stable N and C fractions, proving that the N and C sequestered by both C:N adjustment techniques is much higher than the N and C pools linked to inorganic fertilizer. However, paper mill sludge and manure exhibited higher levels of microbial biomass, which could lead to improved long-term nutrient cycling. It doesn't seem that adding more paper mill sludge to raise the C:N ratio from 20:01 to 30:1 was beneficial. According to these findings, composting and mixed manure + paper mill sludge amendments were equally successful in creating stable N pools in degraded soil. | ||
| Keywords | ||
| Degraded soil; Carbon; Nitrogen; Compost; Paper mill sludge | ||
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