DEVELOPMENTOF LOCAL ALLOMETRIC EQUATION TO ESTIMATE TOTAL ABOVEGROUND BIOMASS IN PAPUA TROPICAL FOREST. 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; R 2 = 95%; R 2 -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.
The people of Gunungkidul have long experience in rehabilitation program. They manage marginal land be productive community forest. While, the quality of timber from community forest is lower than produced by Perhutani. It is caused the community forest has not been applied intensive silviculture technique. This community engagement program aims to: (1) up grade the farmer knowledge about intensive silviculture technique; (2) rise the farmer awareness for importance of applying intensive silviculture technique; (3) build up the farmer skill to apply intensive silviculture technique; (4) motivate the farmer to produce superior teak seedling and organic fertilizer independently. The target group of this program is the farmer group of Ngudi Makmur at Watusigar Village, Ngawen District, Gunungkidul Regency. This program was held on 2015 to 2016. The methods applied in this program are socialization, field study, training, practice, and technical assistance. The results of this program are demonstration plot of superior teak stand, hedge orchard and nursery of superior teak, and organic fertilizer using Trichoderma sp. This program also succesfull for increase of knowledge, awareness, skills and independence of farmer in applying of intensive silviculture technique.
Negara-negara di dunia, khususnya Eropa, Jepang, Korea Selatan dan China, mulai beralih ke penggunaan energi terbarukan yaitu pelet kayu. Indonesia dengan iklim tropis, keanekaragaman jenis tanaman dan ketersediaan lahan untuk pengembangan sumber energi ini, berpeluang menjadi salah satu produsen utama pelet kayu, baik untuk memenuhi permintaan nasional atau internasional. Daerah Istimewa (DI) Yogyakarta merupakan salah satu provinsi di Indonesia yang memiliki hutan rakyat dan berpeluang untuk dikembangkan sebagai produsen pelet kayu. Penelitian ini bertujuan untuk memperoleh informasi awal tentang jenis tanaman kayu potensial di DI Yogyakarta. Pengambilan data dilakukan dengan studi pustaka dan survey kepada Kelompok Tani Hutan (KTH) di Kabupaten Bantul (22 KTH), Gunungkidul (15 KTH), Kulonprogo (15 KTH) dan Sleman (19 KTH). Cabang dan ranting kering merupakan sumber bahan bakar kayu utama bagi KTH di DI Yogyakarta, tanpa melihat jenis tanamannya. Jenis kaliandra (Calliandra calothyrsus) dan gamal (Gliricidia sp.) sebagai jenis potensial untuk pelet kayu ditanam sebagai sumber hijauan makanan ternak, sumber nektar untuk peternakan lebah madu dan untuk konservasi tanah. Kedua jenis ini ditanam sebagai tanaman tepi di pinggir lahan, diantara tanaman pertanian dan atau tanaman berkayu, bukan sebagai tanaman utama. Jumlah yang ditanam sangat variatif berkisar antara 0 - 2000 pohon kaliandra/ha dan 0 - 3000 pohon gamal/ha. Berdasarkan hasil tersebut diketahui bahwa jenis potensial untuk produksi pelet kayu, kaliandra dan gamal sudah ditanam di 4 kabupaten tersebut. Namun penanaman kedua jenis tersebut perlu dikembangkan agar dapat mendukung produksi pelet kayu.
The tourist visits to Suroloyo has increased due to the improvement of accessibility, supporting facilities, and information technology. However, the community forest surrounding Suroloyo is less optimum to support the tourism sector. Coffee as a new icon of Suroloyo could not fulfill the market demand yet, because the forest land resources are less managed. Hence, this community service activity aimed to: (1) identify the structure and composition of the community forest; (2) increasing the understanding of farmers on the optimization of land resource management; and (3) increasing the skill of farmers on coffee cultivation. The number of 35 members of the coffee farmer group in Keceme Village owned 0,35 ha of land on average. Albizia (Falcataria mollucana), saman (Meisopsis eminii) and mahogany (Swietenia macrophylla) dominate the forest stand, by the mean canopy cover of 53% (optimum cover for coffee is 40-60%). The on-farm training for the farmers and interactive discussion with an invited expert on coffee cultivation was held. In addition, the superior coffee seed from the Indonesian Coffee and Cocoa Research Institute are shared to the farmers with expectations of increasing productivity. The motivation and ability of the farmers on coffee cultivation in order to support the agritourism in Suroloyo were increased.
Ebony (Diospyros spp.) is a fancy wood distributed in eastern Indonesia. D. celebica Bakh, D. lolin Bakh, D. pilosanthera Blanco, D. ebenum Koenig, D. ferrea (Wild.) Bakh and D. rumphii Bakh are categorized as “Fancy Wood Class I” in the Indonesian market. These woods are an important product with the highest tax compared to other grades. This study aimed to identify the distribution of six ebonies based on data global biodiversity web service (Global Biodiversity Information Facility) and their climatic condition based on global climate data (WorldClim). Data from the web service, species occurrence, and climatic conditions were processed using QGIS. Species occurrence data was then extracted using GBIF occurrence. Furthermore, species occurrence data was then overlaid with climate data using point sampling tools. The results found that three ebonies scattered in the tropics and three others (D. celebica Bakh, D. rumphii Bakh, D. lolin Bakh) mostly occurred in Indonesia. Annual rainfall and temperature conditions ranged from 1,722 – 4,013 mm and 23.4 – 27.2°C for the three species of ebony in Indonesia. The distribution and climatic conditions of ebony are the initial information for further research, such as the species distribution model related to climate change and the genetic conservation agenda. Keywords: ebony, global data, occurrence data, precipitation, temperature
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