5 research outputs found

    Development of Local Allometric Equation to Estimate Total Aboveground Biomass in Papua Tropical Forest

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    Recently, pantropical allometric equations have been commonly used across the globe to estimate the aboveground biomass of the forests, including in Indonesia. However, in relation to regional differences in diameter, height and wood density, the lack of data measured, particularly from eastern part of Indonesia, may raise the question on accuracy of pantropical allometric in such area. Hence, this paper examines the differences of local allometric equations of Papua Island with equations developed by Chave and his research groups. Measurements of biomass in this study were conducted directly based on weighing and destructive samplings. Results show that the most appropriate local equation to estimate total aboveground biomass in Papua tropical forest is Log(TAGB) = -0.267 + 2.23 Log(DBH) +0.649 Log(WD) (CF=1.013; VIF=1.6; R2= 95%; R2-adj= 95.1%; RMSE= 0.149; P<0.001). This equation is also a better option in comparison to those of previously published pantropical equations with only 6.47% average deviation and 5.37 points of relative bias. This finding implies that the locally developed equation should be a better option to produce more accurate site specific total aboveground biomass estimation

    SEBARAN DAN DINAMIKA PERTUMBUHAN BAMBU PETUNG (Dendrocalamus asper) DI KECAMATAN CANGKRINGAN KABUPATEN SLEMAN, YOGYAKARTA

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    Petung Bamboo is one of important non-wood forest produce in the district of Cangkringan that is many utilized by community as building material/construction, craft, household furniture, ornament, foodstuff and many others. The type is potential to shore up society economic after Merapi eruption and also as conservation plants at the buffer zone. This research aims to know spread and dynamical of Petung bamboos� growth at the district of Cangkringan. Method used is survey by purposive sampling. After doing pre-survey of 5 villages at the district of Cangkringan, each village is chosen 3 sub-villages that contain Petung bamboo. Each subvillage is chosen 10 lands ownership randomly. Measured data includes place highness, and dimension census of bamboo on the each sample. Data is tabulated and analyzed by descriptive qualitative. Research result shows that petung bamboo is spread evenly at the villages in the district of Cangkingan. Higher a place cause high growth and smaller diameter of bamboo. Dynamical of bamboos� growth that consist of number of rebung, young bamboo, old bamboo and cluster wide is affected by place highness and felling intensity

    SEBARAN DAN DINAMIKAPERTUMBUHAN BAMBU LEGI (Gigantochloa verticillata) DI KECAMATAN CANGKRINGAN, KABUPATEN SLEMAN DAERAH ISTIMEWA YOGYAKARTA

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    Bamboo is one of HNNK products (Hasil Hutan Non Kayu/Forest Product Non Timber) that produced considerably in Indonesia for many benefits. In Sleman Area, specifically Cangkringan Sub-district is the bamboo center village that grows in lands or yards. Bambu legi (bamboo legi) is a kind of economical bamboos in Cangkringan which have not been indentified for its potential and distribution. This analysis aims to know the distribution and dynamics over bamboo legi growth in Cangkringan sub-district. Method that used in the analysis is purposive sampling survey. Samples are made based on altitude stratification from 200-400 mdpl, 400-600 mdpl, and >600 mdpl. 50 samples are taken on each altitude (land ownership sector) randomly. Census is conducted to 150 samples for bamboo height parameter, diameter, cluster extensive, number of bamboo sprout, number of green bamboo, and number of ripe bamboo. The data analysis is made by descriptive qualitative. The result indicates bambu legi in Cangkringan spreads evenly to all village and altitude. The altitude does not affect to the growth bambu legi, despite the trend of various bamboo dimension on height and diameter. The dynamics of bamboo growth (bamboo sprout, green bamboo, ripe bamboo, cluster extensive) is affected by some factors such as ecology, social, and economy of the society

    Kajian Pola Pertanaman Agroforestri Hutan Rakyat Di Dukuh Manggung, Desa Sukorejo, Kecamatan Musuk, Kabupaten Boyolali

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    Agro-forestry is a land work system with a new science but use conventional method. Thus, need to be studied continually and continuously in order agroforestry science can still develop agree with time development. Aim of this research is to study about planting pola of citizenry forest which develops in the community of a certain area of agro-forestry in order can give a view of adaptive and ideal agro-forestry form that can fulfillment economy functional, ecology and community social. The research was done at Manggung hamlet, Sukorejo village, district of Musuk, regency of Boyolali, Central of Java. Methods used field observational census 100%. Collecting data is done on the 30 sample plots that are divided into 3 stratums based on land ownership areal wide. The first stratum has land areal wide less than 1.000 m2, the second stratum has land areal wide 1.000 m2 � 2.000 m2, and the third stratum has land areal wide more than 2.000 m2. The research result shows that planting pola of agro-forestry that is developed in the hamlet of Manggung, village of Sukorejo, district of Musuk, regency of Boyolali is TAB with pola (Trees along border), and pola alternate row. Plants composition that is existed can be utilized to produce wood that is Sengon (Paraserianthes falcataria), mahagony (Swietenia macrophylla), Mindi (Melia azedarach), Waru (Hibiscus tilieceus), Hardwood (Tectona grandis), Jabon (Anthocephalus cadamba). To plantation produce such as Clove ( (Eugenia aromatic) and plant product of MPTS (Multi Purpose Trees Species) such as Avocado (Persea Americana), Jackfruit plant (Artocarpus heterophyllus), rambutan (Niphelium lappaceum), Durian (Durio zibethinus), Petai (Parkia speciosa), melinjo (Gnetum gnemon), Kaliandra (Calliandra callothyrsus), Randu (Ceiba pentandra), Sukun (artocarpus Altilis), Guava (Psidium guajava) dan Kluwih (Artocarpus camansi). Wood plant that is dominant is Sengon (Paraserianthes falcataria)
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