Effect of different fertilization modes on soil organic carbon sequestration in acid soils |
| |
| Authors: | Ieva Jokubauskaite Danute Kar?auskien? Alvyra Slepetiene Regina Repsiene Kristina Amaleviciute |
| |
| Institution: | 1. Vezaiciai Branch of the Lithuanian Research Centre for Agriculture and Forestry, Klaipeda, Lithuaniajokubauskaite.ieva@gmail.com;3. Vezaiciai Branch of the Lithuanian Research Centre for Agriculture and Forestry, Klaipeda, Lithuania;4. Chemical Research Laboratory, Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry, Akademija, Lithuania |
| |
| Abstract: | ABSTRACTA meta-analysis of 297 treatment data from the Vezaiciai Branch of the Lithuanian Research Centre for Agriculture and Forestry long-term field experiment published from 2006 to 2015 was used to characterize the changes in SOC under different fertilization treatments and residue management practices in Lithuania’s acid soil. A meta-analysis was performed to quantify the relative annual change (RAC) of SOC content and the average RAC rate of SOC under four fertilization modes (farmyard manure (FYM) (40?t?ha?1)); alternative organic fertilizers (in the manure background (40?t?ha?1)); FYM (60?t?ha?1); alternative organic fertilizers (in the manure background (60?t?ha?1)) in two soil backgrounds (naturally acid and limed soil). The average RAC under four fertilization modes was 1.46 g?kg?1?yr?1, indicating that long-term fertilization had considerable SOC sequestration potential. Incorporation of alternative organic fertilizers in unlimed soil showed negative effects (?0.39 and ?0.66 g?kg?1?yr?1) in the observed long-term experiment. The RAC in the limed soil with incorporated organic fertilizers (FYM and alternative organic fertilizers), compared to the control, and varied from 0.25 g?kg?1?yr?1 in the treatment with incorporated alternative organic fertilizers (in the manure background (40?t?ha?1)) to 0.71 g?kg?1?yr?1 in the soil with FYM (60?t?ha?1). In this study, the average RAC rate of SOC under organic fertilization treatments in limed soil (5.07–6.54%) was longer than organic fertilization in unlimed soil (2.11–3.49%), which might be attributed to the application of organic manure that would result in a slow release of fertilizer efficiency. Our results indicate that the application of manure (40 or 60?t?ha?1) showed the greatest potential for C sequestration in agricultural soil and produced the longest SOC sequestration duration. |
| |
| Keywords: | Acid soils soil organic carbon carbon sequestration long-term fertilization meta-analysis |
|
|
