Peatland is one of Indonesia’s unique ecosystems and has various functions in maintaining environmental stability. The increasing demand for land in various sectors has led to activities in peat areas. Land conversion and sub-optimal management of peatland can affect the properties of the peat. This study aims to analyze the chemical properties of peat soil on four land management areas in Teluk Bakung Village, West Kalimantan. The areas were rubber stand, burnt land, taro plantation with non-burning land management, and taro plantation with burnt land management. The method used was purposive sampling with a set of five points as soil sampling within the plot measuring 20 m x 100 m. Soil samples were taken at a depth of 0 – 10 cm at each site. Then, the soil samples were evenly composited for further analysis in the laboratory. The results of the study showed that the parameters of the chemical properties at each site had various values. Burnt land had higher N, P, K, Na, and CEC values. Meanwhile, the highest pH, Ca, and Mg values were in taro plantations with non-burning land management. Then, the highest ash content values were in taro plantation with burnt land management. For the value of C-organic, rubber stand had the highest percentage compared to the other land conditions.
Rafflesia zollingeriana Koord. is a typical Indonesian flora located in Meru Betiri National Park. It is a diesis flower whose need pollinators for its pollination. This study guessed to predict the type of insect pollinators of R. zollingeriana Koord. at Bandealit Resort, Meru Betiri National Park (TNMB). Data retrieval uses yellow pan trap and sweeps net for observing flying insects and behavioral observation to deal with insects that are active in R. zollingeriana Koord. Measurements of temperature, humidity, and canopy density carried out on sample plots. Estimation of pollinator done by comparing flying insects found with insects that are active in flower. There are 589 individuals of insect trapped consisting of 45 families, 12 orders, and five individuals unidentified. There are four female flowers and one male flower that blooms. Attractive insects as pollinators are Lucilia from Calliphoridae family, Diptera order.
Forest and land fires are phenomena that often occur in Indonesia and have a negative impact on life. One of them is carbon dioxide gas emissions which influences global climate change. Therefore, information is needed regarding the estimation of carbon dioxide emissions in fire-prone areas, one of them is West Kalimantan, as a consideration in the activity to control forest and land fires. The method that is applied in this research is by estimating the area of the burned area then estimating carbon dioxide gas which refers to the loss of burning biomass. The results showed that the number of hotspots detected in Ketapang Regency sequentially in 2013, 2015, and 2017 amounted to 368, 2824 and 141 hotspots which were dominated by mixed dry-land agriculture, swamp shrub and shrub. Meanwhile, emissions of carbon dioxide gas produced in 2013, 2015, and 2017 in mineral soils amounted to 644 135.92 tons CO2, 3 455 169.72 tons CO2 and 293 967.87 tons CO2, while in peat-lands emissions emitted are 48 162.91 tons of CO2, 919 640.45 tons of CO2 and 10 835.71 tons of CO2. Key words: carbon dioxide gas emissions, hotspots, Ketapang District, land cover
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