Carbon Stock of Agroforestry Systems at Adjacent Buffer Zone of Lore Lindu National Park, Central Sulawesi

Bau Toknok,Zulkhaidah Zulkhaidah,Wardah Wardah

doi:10.5400/jts.2011.v16i2.123-128

Abstract

The potential of agrofrestry to sequestrate carbon varies depending on the natural quality of sites and management practices. Agroforestry is a climate change mitigation activities. The aim of study was to estimate the carbon stock of agroforestry system at adjacent buffer zone of Lore Lindu National Park (LLNP). Research was carried out in two types of agroforestry stands (simple and complex) adjacent LLNP buffer zone in Palolo Sub District, Sigi District, Central Sulawesi. Estimation of biomass of tree, herbs, litter, necromass and root was based on an allometric equation. The carbon storage in soil was estimated based on the carbon organic content and bulk density of soil in30 cm of depth. The results of study showed that the total carbon stored in the simple agroforestry (125.97 MgC ha-1) was significantly lower than in the complex agroforestry (209.39 MgC ha-1). In addition, the aboveground carbon stock biomass (tree, herbaceous, necromass and litter) and belowground carbon stock (root and soil organic) in a simple agroforestry were 42.42 MgC ha-1 and 83.55 MgC ha-1, respectively. Whereas, the aboveground carbon stock biomass and belowground carbon stock in the complex agroforestry were 98.46 MgC ha-1 and 110.93 MgC ha-1, respectively. Based on the carbon stock estimation in six agroforestry plots in the buffer zones of Lore Lindu National Park, the complex agroforestry was likely to be more stable and more longer in storing carbon comparedto the simple agroforestry.Keywords: Agroforestry, biomass, carbon, climate change, Lore Lindu National Park

Highlights

Ultisols is one of the marginal soils in Indonesia that it has great potential to be developed as a new established rice field
The purpose of this research was to gain a technological breakthrough in controlling Fe toxicity by using humic acid from compost of rice straw and water management in new established rice fields of Ultisol, so that optimal production of rice plants could be achieved
The continuous and intermittent irrigation treatments reduced soil Eh value, but decreasing Eh value with intermittent irrigation was relatively smaller than the continuous irrigation treatment

Summary

Introduction

Ultisols is one of the marginal soils in Indonesia that it has great potential to be developed as a new established rice field. The very high Fe avaibility does not cause problems for rice plant growth, because Fe is reacted with other elements and that are generally not soluble. The symptoms of Fe toxicity in the plant are visually marked with reddish brown spots along the edge strands of the leaf starting from the lower leaves or the oldest (Satari et al 1990; Sahrawat 2000). Another consequence is the formation of plaque on root tips of plants that can inhibit the absorption of both macro and micro nutrients (Hagnesten 2006)

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Conclusion