CO2 Emissions from Tropical Peat Soil Affected by Fertilization
| Autor: | Nurhayati, Husnain, Joko Purnomo, Ibrahim Adamy Sipahutar, Hery Widyanto |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Peat
010504 meteorology & atmospheric sciences Soil classification 04 agricultural and veterinary sciences engineering.material 01 natural sciences complex mixtures Amelioration chemistry.chemical_compound Human fertilization Agronomy chemistry Tropical peat fertilization Soil pH CO2 emission Soil water 040103 agronomy & agriculture engineering Urea 0401 agriculture forestry and fisheries Fertilizer lcsh:Science (General) 0105 earth and related environmental sciences lcsh:Q1-390 |
| Zdroj: | Journal of Tropical Soils, Vol 22, Iss 1, Pp 1-9 (2017) |
| ISSN: | 2086-6682 |
| Popis: | The conversion of peat soils to agricultural uses has been thought to increase CO2 emission due to several factors, including fertilization. However, evidence on the effect of fertilization on CO2emissionsfrompeat soils is rareand often inconsistence. We measured the effects of different types of fertilizer, including N, P and K sources, and clay as an ameliorant on CO2 emission from a bare peat soil in Lubuk Ogong, Riau Province. Nutrients were added in the following combinations: 0 (unfertilized plot), N source (urea), slow-release N (slow release urea), N and Psource (Urea+SP-36), N, P and K sources (urea+SP-36+KCl) and combined NPK-Clay. Fertilization resulted in a decreasein CO2 emissions compared to that prior to fertilization except when slow-release urea was applied. Decreasing of CO2 emissions was probably due to pH-related effects because the pH in the N treatment was lower than in both the control and the unfertilized plot. A decreasein the level of CO2 emissions among the treatments followed the order NPK-Clay>NP>NPK>urea>slow-release urea. Covariance analyses showed that the difference in CO2 emissions prior to treatment was not significant. The application of individual and combined treatments of N, P, K and NPK mixed with 5 Mg ha-1 clay led to significantly reduced CO2 emissions from bare peat soil in Lubuk Ogong, Riau Province. In addition to fertilization, the water table depth was the only parameter that significantly affected the CO2 emissions (P |
| Databáze: | OpenAIRE |
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