Soil respiration front oil palm on replanted and newly developed peat
2009
Hasnol Othman | Mohd Haniff Harun | Hamdan Abu Bakar | Nur Maisarah Jantan | Mohd Roslan Md Noor
This study compares soil respiration rates from oil palm replanting and newly planted oil palm areas on peat at the Malaysian Palm Oil Board (MPOB) Research Station Teluk Intan, Perak and Ladang Sungai Mentelong, Endau-Rompin, Pahang using survey method. The soil respiration rate was 50% higher in the newly developed peat area (2482 ± 160 mg CO₂/m²/hr) compared to the replanted peat area (1098 ± 69 mg CO₂/m²/hr). The soil moisture content at the replanted peat area was 39% higher compared to the new developed peat area. Soil respiration rate between control (natural ground cover) and Mucuna bracteata (legume cover crop) plots at both sites were not significantly different, although slightly higher in the Mucuna bracteata (1762 ± 123 mg CO₂/m²/hr) area compared to the control (1539 ± 118 mg CO₂/m²/hr). Soil respiration rate was affected by soil moisture, which influenced soil respiration directly through physiological processes of roots and microorganisms, and indirectly via diffusion ofsubstrate and oxygen, where it was influenced by drainage and water level. Drier soil had more air space, thus enabled aerobic respiration by root.
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