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2 Journal of Ecological Engineering

2 2023

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Response of Different Coffee-Based Agroforestry Management on Microbial Respiration and Density

Nugroho R. Muhammad Yusuf Adi Pujo, Ustiatik Reni, Prasetya Budi, Kurniawan Syahrul

Journal of Ecological Engineering

2023

Vol. 24, nr 9

158--170

Coffee agroforestry has become a land use system that provides both ecological and economic benefits, so it is managed in various ways. Pruning and fertilizer management is a combination that is applied for optimal production. However, understanding the effect of combined management on soil respiration and functional microbial populations remains unclear. This study aimed to determine the effect of combining pruning and fertilizer management on soil respiration and functional bacterial populations as well as to elucidate the relationship between tested parameters. The study was conducted in UB Forest. A factorial randomized block design consisting of three factors, i.e., coffee pruning, type of fertilizer, and fertilizer doses was used. The results showed that combining three factors affected the diazotrophic bacterial population and soil respiration, which is sensitive to management changes. Coffee pruning and mixed fertilizer (inorganic + organic) application affected soil respiration and microbial populations, while the dose affected each parameter differently. The conducted study suggests that pruning management with mixed fertilizer application can substitute inorganic fertilizer as more environmentally sustainable management in coffee-based agroforestry.

Microbial Biomass and Soil Respiration Response to Pruning and Fertilization Practices in Coffee-Pine Agroforestry

Azizah Futihatu Rizkiani, Prayogo Cahyo, Kurniawan Syahrul, Rowe Rebecca L.

Journal of Ecological Engineering

2023

Vol. 24, nr 8

329--342

Pruning and fertilization practices plays an important role in coffee plantation, used to maintain soil quality and coffee productivity. However, the impact of pruning and fertilization practices on soil microbial activity under coffee-based agroforestry are poorly understood. The aimed of this study was to analyze the response of soil microbial properties (i.e., soil microbial biomass C (SMBC) and soil respiration rates (SR)) to pruning and fertilization management in coffee-based agroforestry in UB (Universitas Brawijaya) Forest. A split-plot design with eight treatments and three replications were used in this experiment. The main-plot factor consisted of two types of pruning (Pruning and Bending), and the sub-plot factor consisted of four types of fertilization (i.e., no fertilizer (NF), 100% chicken manure (MN), 50% chicken manure + 50% NPK-inorganic (MN+NPK), and 100% NPK-inorganic (NPK)). The result showed that there was a significantly different (p<0.05) in the soil microbial biomass C and soil respiration after the application of fertilizer. The addition of chicken manure (MN and MN+NPK treatment) could enhance the soil microbial biomass and soil respiration, compared to the NF treatment under different pruning practices. The level of soil pH in MN were highest and significantly different with NPK treatment, showed that the application of chicken manure had a potential to neutralize the soil acidity. Metabolic quotient (qCO2) showed highest in the NF treatment as compared to the other treatments. The soil respiration had positive correlation (p<0.05) with SMBC, while SMBC had negative correlation (p<0.01) with qCO2.