Abstract
<p><strong> </strong></p>Environmental condition of around rivers and swamps causes the Banjarese people to build settlements use ulin (<em>Eusideroxylon zwageri</em> T. et. B.). Using ulin has become their culture, because they believe the building will be stronger. In fact the potential ulin from year to year continues to decline, because the growth is not proportional to the speed of ulin needs for construction, thus it is becoming scarce. This research was conducted in Kabupaten Tanah Laut and Kabupaten Kotabaru. The method used survey with purposive sampling (large of sample plot 100 m x 100 m which each plot divided into 25 sub-plots of 20 m x 20 m). All growth stages of ulin were inventoried and in each plot found ulin measured micro climate and collected sample of soil. Normally ulin can grow well on un-fertile soil, but micro climate like primary forest or old secondary forest. Potential ulin in both Kabupaten per hectare is very low. The amount of natural regenerations ranged from 3-5 individuals/ha for seedling and 3-46 individuals/ha for sapling. Number of poles found in both locations are ranged 5 – 6 individuals/ha, and not found tree stage. Restrictions on harvesting and conservation of ulin are urgently needed in South Kalimantan
Highlights
Based on USDA classification, the soil texture belong to dusty clay loam (DCL)
Result of research in East Kalimantan that ulin grows at the pH 5.2-5.8 and organic matter content ranged from 1.833.21%, respectively (Effendi, 2004), ulin grows in soil having sandy loam texture with low soil fertility in South Sumatra (Nugroho et al, 2006)
In East Kalimantan regeneration of ulin found at temperature of 27,1-29,9oC, humidity 69,2-95,3%, and light intensity 321,0-737,3 lux (Sidiyasa, 2011). These results show that regeneration of ulin need shading for life
Summary
B.) is locally known as ulin, belian, or tembelian. This heaviest and most durable native species known as Indonesian ironwood, have been used since hundred of years by community around the forest for various purposes such as wooden roof known as “siraf”, doors, floors, frames of doors and windows, bridges, platform for small harbor, and ornaments in front of a house. Environmental condition or habitat of the rivers and swamp have been shaped the culture of Banjarese and known as the river-culture community. For this reason, all elements of Banjarese culture can be traced the with relation to the river environment (Muchamad and Mentayani, 2010)
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