Population Dynamics of Microorganism and Greenhouse Gas Emission By Applying Chicken Manure in Peat Soil

Ali Pramono,Prihasto Setyanto,Terry Ayu Adriani,A Wihardjaka

doi:10.20527/jwem.v4i2.103

Abstract

Peat land accumulates organic materials and emits greenhouse gas (GHG). Agricultural activities in peat land cause the subsidence of peat land surface and the loss of carbon in the form of GHG. Appropriate management of peat land for agriculture would reduce GHG emission. This research aims to understand the microorganism population dynamics and emission of GHG on the treatment of chicken manure application in peat land. The research was conducted in the GHG Laboratory of Indonesia Agricultural Environment Research Institute (IAERI) in 2012 using peat material taken from Jabiren, Central Kalimantan. The experiment was done by incubating peat soil for 2 months with the treatment of chicken manure application and without manure. The incubation experiment was conducted by using paralon PVC pipe. Parameters observed included pH, Eh, bacteria population and fungi, as well as GHG flux (CO2, CH4 and N2O). GHG samples taking method was used a sealed containment. The research result showed at the peat given chicken manure treatment, bacteria population decreased at the end of incubation; fungi population, however, increased. The application of chicken manure on peat land planted rubber trees and pineapples would reduce GHG emission by 12.8% as compared without manure application.

Highlights

Peat land which has different thickness and vegetation types contains different C deposit
Considering the large amount of C deposit in peat land where the ecosystem is fragile, if it was not managed properly it would cause the release of C in large amount, especially in the form of CH4and CO2 to the atmosphere, so that it further increases greenhouse gas (GHG) emission
Peat land that has been opened for agricultural purpose will increase GHG emission because soil pH increases so it is suitable for methanogen growth

Summary

INTRODUCTION

Peat land which has different thickness and vegetation types contains different C deposit. Considering the large amount of C deposit in peat land where the ecosystem is fragile, if it was not managed properly it would cause the release of C in large amount, especially in the form of CH4and CO2 to the atmosphere, so that it further increases GHG emission. Based on researches conducted in IAERI in 2007; 2008; 2009; 2010 the application of ameliorants could reduce the emission of GHG by 7-47%, zeolite by 21%, Fe slag by 29%, manure by 16-31% and silicate SiO4 fertilizer by 18%. In order to minimize the impact of tropical peat land management activities by using ameliorant application that can reduce the emission of C from peat land, it is necessary to know the effect of ameliorants on GHG emission as well as the microbial activities in peat land. This research aimed to know the microorganism population dynamics and emission of GHG due to chicken manure application in peat soil

MATERIALS AND METHODS

AND DISCUSSION

Findings

CONCLUSION