Tropical Wetland Journal (TWJ)
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MAPPING OF AGRICULTURAL LANDS IN FLOOD HAZARD AREAS IN HULU SUNGAI TENGAH REGENCY, SOUTH KALIMANTAN
Full text linkFloods are natural disasters that frequently hit several developed and developing countries including Indonesia every wet season. Floods also occur in agricultural lands. The purpose of this study was to map the agricultural lands in flood hazard areas in Hulu Sungai Tengah Regency, South Kalimantan Province. Data collecting methods used were field research and literature (library research). Data were analyzed using quantitative and qualitative approaches (mixed methods), with the techniques of scoring, SWOT, and spatial analysis (ArcView 3.2 software). Flood hazard levels of most areas in Hulu Sungai Tengah were categorized into no hazard (957.36 km2), low hazard (243.82 km2), medium hazard (455.01 km2), and high hazard (114.91 km2). The use of agricultural lands for rice fields in Hulu Sungai Tengah were located in all subdistricts and flood hazard areas
SPATIAL DISTRIBUTION OF MANGROVE ECOSYSTEM IN CONSERVATION AREA OF TELUK KELUMPANG NATURE RESERVE
Full text linkMangrove forest area of 98,494.6 ha (72.86%) is distributed in Kotabaru Regency. Based on the forest status, the mangrove forest consists of a nature reserve zone covering an area of 66,487.5 ha (67.50%), production forests 3,510.4 ha (3.57%), and area for other uses 28,496.7 ha (28.93%) (BKSDA, 2008 the Ministry of Forestry, 2009; Sirang et al., 2010). The purpose of this study was to find out the spatial distribution of mangrove ecosystem in Teluk Kelumpang Nature Reserve. The study was conducted using a remote sensing technology (Landsat 7 ETM + 2012 (Path/Row: 117/063) to obtain data of the extent, and the distribution of mangrove forest species in Teluk Kelumpang nature reserve. The measurement of mangrove vegetation was to find out the potency and characteristics of mangrove forest stands. The results showed that the potential vegetation in the area of Teluk Kelumpang nature reserve was R. apiculata, R. mucronata and B. gymnorhiza. Teluk Kelumpang nature reserve is divided into two zones. The first zone is proximal zone (50 m - 100 m from coastline), a zone dominated by R. apiculata and R. mucronata plants. The second is middle zone, a mixed zone comprising B. gymnorhiza, X. granatum, C. decandra, and N. fruticans, with the area of > 100 m - 500 m from the river line and coastline
MACROALGAE DIVERSITY IN CORAL REEFS AT THE WATERS OF TELUK TAMIANG VILLAGE, KOTABARU
Full text linkThe purpose of this study was to map the distribution of macroalgae at the waters of Teluk Tamiang Village, Kotabaru, South Kalimantan. The results showed that there were 8 species of macroalgae living in coral reef ecosystems. They originated from 7 order, 8 family, 8 genera, consisting of Acanthopora muscoides, Gracilaria coronopifolia, Amphiroa fragillissima Chlorodesmis sp., Halimeda macroloba, Enteromorpha sp., Turbinaria conoides, and Dictyota pinnatifida. The diversity index of two stations observed in this study was low
AGRIBUSINESS INNOVATION IN FRESHWATER SWAMP THROUGH DEVELOPMENT OF ORGANIC RICE
Full text link In the economy of South Kalimantan, the agricultural sector has a significant growth and plays a role as one of the major contributors to the economic structure. However, in some areas with particular land typology like freshwater swamp; it is not reflected in the level of farmers’ welfare. In reality, many farming households in freshwater swamp that solely rely on rice farming still live in a poor condition because of low income. It is therefore necessary to find the alternative solutions through agribusiness innovation. Until now freshwater swamp is always identified with non-organic rice or conventional freshwater swamp rice; Alabio livestock, Alabio potato and Swamp buffalo. The purpose of this study was to analyze the potency of freshwater swamp for the welfare of farmers through agribusiness innovation in addition to oil palm plantations. The study was conducted in Teluk Limbung Village, Babirik Subdistrict, Hulu Sungai Utara Regency, by census with 17 farmers as the respondents. The productivity of organic rice in freshwater swamp reached 4.6 tons/ha. The earned income was greater compared to the income when the farmers only grew inorganic rice like what is commonly cultivated by farmers in the swampy lands
DEVELOPMENT POTENTIAL OF NAGARA BEAN (Vigna unguiculata ssp. Cylindrica) CULTIVATED IN FRESHWATER SWAMPLANDS FOR PROCESSED FOOD
Full text linkNagara bean/ catjang (Vigna unguiculata spp. Cylindrica) is a subspecies of cowpea which is widely cultivated in freshwater swamplands of Daha Utara and Daha Selatan sub-districts, Hulu Sungai Selatan Regency. Nagara bean is a plant native to South Kalimantan, but its utilization is still very low compared to other cowpeas. The aims of this study were to analyze the chemical and physical characteristics of Nagara bean in processed food compared to those of soybeans; and to analyze the development potential of Nagara bean in processed food. The methods were the production of catjang flour from skinless Nagara beans; the production of catjang flour by roasting Nagara beans; the substitution of Nagara beans with coagulated and fermented soybeans. The results showed that the flour from skinless Nagara beans contained protein (24.16%) and carbohydrate (61.62%), while the flour from roasted Nagara beans contained protein (18.42%) and carbohydrate (69.33%). When compared to soybeans, papan and arabian beans, the two types of Nagara bean, could be coagulated with a higher water content and lower protein content. When Nagara beans were fermented, the water and protein contents of fermented beans were higher than those of soybeans. It can be concluded that Nagara beans could be used in processed foods chemically. Nagara beans however absorbed water easily, so they smelled sour and unpleasant and the texture became soft
VARIATION OF BIOMASS IN GRASSES GROWING IN WATER HABITAT BETWEEN INLAND SWAMP AND LAND
Full text linkGrasses (family Poaceae), which belong to the weeds growing in water habitat between inland swamp and land, have the ability to survive the inland swamp environment that is inundated and poor in nutrients due to acidic soil. Lowland between inland swamp and land experiences waterlogging condition that changes over time from a puddle of water, which is very high in the rainy season, to ebb, becoming dry especially during the dry season. The objective of this study was to find out the variation of biomass in some grasses growing in water habitat between inland swamp and land. The study was conducted from April to July 2009 in Banjar Regency, South Kalimantan, at the villages of Tungkaran, Sungai Rangas, Penggalaman, and Sungai Tabuk. The analysis of samples was carried out at the Basic Laboratory of Faculty of Mathematics and Natural Siences, Lambung Mangkurat University Banjarbaru. There were seven stations, which were determined purposively, with three plot replications; the smallest plot was 20 x 20 cm. Three types of grass samples were taken and measured for individual height, wet weight, dry weight, moisture content and ash content. Measurements of the environmental parameters included the pH of soil and water, and the analysis of total N, P, and K. The average dry weight biomass of Hymenachne amplexicaulis, Brachiaria plantaginea, and Brachiaria mutica ranged from 1,135.18 to 2,556.80 gm-2, 1,854.88 to 2,480.63 gm-2, and 1,353.98 to 3,204.9 gm-2, respectively. These results indicate that the grasses growing closer to land, namely Brachiaria plantaginea and Brachiaria mutica, have higher biomass than the one growing a bit far from the land, namely Hymenachne amplexicaulis
WATER LEVEL VARIATIONS FOR EGG HATCHABILITY AND LARVAL SURVIVAL OF KELABAU FISH (Osteochilus melanopleura Blkr)
Full text linkThe purposes of this study were to observe and analyze the water level variations of the culture media that were optimal for egg hatchability and larval survival of kelabau fish kept in aquarium. This study was conducted in the Freshwater Aquaculture Development Centre (FADC) Banjar Regency in August 2015. The method used in this study was experimental, using a completely randomized design with 3 treatments (A = water level of 15 cm/aquarium), (B = water level of 25 cm/aquarium), (C = water level of 35 cm/aquarium) and 3 replications. The parameters measured in this study were the egg hatchability, survival rate, relative growth rate, and water quality (temperature, pH, DO, Ammonia). Data were analyzed by Anova and the differences between treatments were tested with Duncan test. The results showed that the water level very significantly affected the egg hatchability with the highest value in B (38.29%) followed by C (31.83%) and A (14.04%). The highest survival rate was in C (79.73%) followed by B (65.10%) and A (21.83%). The relative growth rate had not significant effect with the average results between all treatments (104.92 – 117.27%). The water quality of the culture media was still good to support the growth and survival of fish
LOCAL WISDOM IN UTILIZING PEAT SWAMP SOIL AND WATER TO IMPROVE QUALITY OF GELAM WOOD
Full text linkLocal wisdom in utilizing swamp soil and water to improve the quality of gelam wood in Central Kalimantan becomes an interesting phenomenon. Improving the quality of wood can economize on the use of wood, which in turn preserves the forests in peat swamp lands. Gelam (Melaleuca sp.) woods that are mostly found in peat swamp forests can be used as piles/stakes in swamp soil, and they are durable for decades. The general objective of this study was to provide a scientific explanation of the effect of peat swamp soil and water on improving the quality of gelam wood either in barked and barkless conditions. This study was conducted by taking gelam trees that grew in Central Kalimantan. It was carried out for 18 months, and investigated the barked/barkless woods, media (swamp water, freshwater, peat swamp soil, and sandy soil) and 3 lengths of burying times. Wood properties analyzed were physical and mechanical properties. The standard of physical-mechanical property tests referred to British Standard 373.
The results showed that the interaction between bark factor (A) and media (B) affected specific gravity. Barked wood produced the highest spesific gravity in swamp water medium. Water media (swamp and fresh water) improved the wood’s specific gravity more than soil media (swamp and sandy soil). The highest values of hardness, stress on Proportional Limit, and Modulus of Elasticity were in the medium of swamp soil. The improvement of the quality of gelam woods, which were either buried or used as stakes/piles, was allegedly resulted from the swamp water infiltrating into gelam woods that thereby increased the specific gravity
ESTIMATION OF CARBON STORAGE IN WATER LETTUCE (Pistia stratiotes) AT FRESHWATER SWAMPS
Full text linkThis study was conducted in Banjar Regency, in the areas of Keraton, Keramat Baru, Tungkaran, Akar Baru and Sungai Tabuk villages, South Kalimantan, from April-July 2009. The purpose of the study was to estimate the amount of carbon storage in water lettuce (Pistia stratiotes) at freshwater swamps. The information obtained through this study is expected to provide benefits for the swampland management. The swamplands observed were the ones with water lettuce growing in the swamps. The sampling was carried out using purposive sampling technique with the consideration of grouping water lettuce’s distribution. The carbon storage measurement was performed by measuring biomass, organic carbon percentage in water lettuce, and total carbon storage in m2. The organic carbon was analyzed using Walkey & Black\u27s Method. There were also analyses of crude fiber and ash in water lettuce. Data were then analyzed using descriptive statistics and hierarchical clusters. The carbon storage in water lettuce at freshwater swamps in Banjar Regency ranged between 64.07 – 237.75 g/m2. The average crude fiber ranged between 19.89 - 24.94 % and ash between 20.91 - 28.69%
ROLE OF PURUN TIKUS IN VERTICAL SUBSURFACE FLOW CONSTRUCTED WETLAND IN TREATING MANGANESE (Mn) FROM COAL MINE DRAINAGE
Full text linkConstructed wetland (CW) is one of the passive methods used to process coal mine drainage. In this study, we used vertical (VF) subsurface flow (SSF) constructed wetland (CW) with purun tikus (Eleocharis dulcis). The purpose of the study was to assess the role of purun tikus in increasing the efficiency of constructed wetland to remove Mn from Coal Mine Drainage. The constructed wetland operated under batch hydraulic loading regime. The results showed that the efficiency of the VF-SSFCW System without purun tikus was 15.53% and VF-SSFCW with purun tikus 78.94%