Abubakar Muhamad Lahjie

• Professor
• Lecturer at Mulawarman University

Edible-nest swiftlets have many health benefits. The availability of edible-nest swiftlets from caves is decreasing, while the demand for edible-nest swiftlets is getting higher. Swiftlet farming is carried out to meet this demand. The location of swiftlet farming should be close to the feeding sources. Swiftlet is flying insectivorous animals. A f...

This research are (1) know how much the potential and interest of consumers (2) explain the strategy of developing mangrove forest ecotourism in Mentawir Village. Research methods in the form of quantitative and qualitative data accompanied by primary data and secondary data. Data were collected using surveys, questionnaires, literature, documentat...

Mursidah, Lahjie AM, Masjaya, Rayadin Y, Ruslim Y. 2020. The ecology, productivity and economic of swiftlet (Aerodramus fuciphagus) farming in Kota Bangun, East Kalimantan, Indonesia. Biodiversitas 21: 3117-3126. Swiftlet nest is a high-value non-timber forest product produced from the saliva of swiftlet birds. While the demands for this commodity...

Abstrak Untuk mengetahui analisispertumbuhan Gmelina (Gmelina alborea.Roxb) dan Mahoni (Swietenia magrophylla.King). Maka perlu melihat pertumbuhan pada periode tertentu dimana suatu saat tertentu pertumbuhan akan menurun sehingga menjadi bahan pertimbangan dalam pemeliharaan bisa dilakukan dengan sangat evektif dan pertimbangan untuk melakukan pem...

Community forests Gorontalo are widely planted and maintained by Gorontalo people where the area is not too large which only ranges from 1ha. This type is good for carbon absorption, as for this type of Mahogany (Swetenia macrophylla), Jabon (Anthocephalus macrophyllus). A. macrophyllus (A) 660 trees13.07m³ ha ̵ ¹ year ̵ ¹,7.67 tons ha ̵ ¹ year ̵ ¹...

Mangroves play important role in life. The benefits of the mangrove ecosystem consist of ecological and socio-economic values. However, it is a challenge to discern how the mangrove ecosystem provides a comprehensive economic value. This research is aimed to analyze the Total Economic Value (TEV) of mangrove ecosystems in Mentawir Village, North Pe...

Productivity of three varieties of local upland rice on swidden agriculture field in Setulang village, North Kalimantan, Indonesia. Biodiversitas 21: 49-56. Swidden agriculture field is a dry land used by traditional farmers to cultivate some varieties of local upland rice intercropped with vegetables, tubers, and fruits. This rotational cultivatio...

Penelitian ini bertujuan untuk mengetahui riap pertumbuhan, tingkat pengembalian nominal dan kelayakan keuntungan profit sharing pengelolaan hutan tanaman Jenis Eucalyptus pellita F. Muell dan Acacia mangium Willd di Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur. Analisis pertumbuhan riap dan produksi menggunakan metode riap MAI dan CAI pad...

Penelitian ini dilaksanakan di kawasan Taman Nasional Kutai (TNK) Provinsi Kalimantan Timur. Tujuan dari penelitian ini adalah Mengetahui laju tingkat pertumbuhan tanaman pada lahan restorasi mangrove di TNK, Mengetahui hubungan kualitas lahan restorasi dengan laju pertumbuhan tanaman pada lahan restorasi mangrove di TNK, Mengetahui faktor tempat t...

Desa Setulang Kabupaten Malinau.Ladang gilir balik (shifting cultivation) merupakan cara pertanian tertua yang dijumpai di daerah tropis, di mana petani harus berputar dari satu tempat ke tempat lain dan kembali ke tempat semula setelah beberapa tahun. Bagi suku Dayak yang sebagian besar penduduknya bermata pencaharian sebagai petani, kegiatan perl...

Penelitian ini bertujuan untuk mengetahui riap pertumbuhan, tingkat pengembalian nominal dan kelayakan keuntungan profit sharing pengelolaan hutan tanaman Jenis Eucalyptus pellita F. Muell dan Acacia mangium Willd di Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur. Analisis pertumbuhan riap dan produksi menggunakan metode riap MAI dan CAI pad...

Perladangan gilir balik (shifting cultivation) merupakan cara pertanian tertua yang dijumpai di daerah tropis, di mana petani harus berputar dari satu tempat ke tempat lain dan kembali ke tempat semula setelah beberapa tahun. Bagi suku Dayak yang sebagian besar penduduknya bermata pencaharian sebagai petani, kegiatan perladangan padi adalah sebagai...

Kristiningrum R, Lahjie AM, Masjaya, Yusuf S, Ruslim Y. 2019. Species diversity, stand productivity, aboveground biomass, and economic value of mangrove ecosystem in Mentawir Village, East Kalimantan, Indonesia. Biodiversitas 20: 2848-2857. Mangrove forest is one of the important ecosystems. It provides a variety of benefits both ecologically and e...

The objective of the research were to determine the volume increments, to find out the optimum ages and maximum increment, to know which plant effort was more profitable than each types exploitations, to analyze the financial feasibility and to know the farmers' financial needs and the level of interest by sensitivity analysis. This research was co...

Setiawan B, Lahjie AM, Yusuf S, Ruslim Y. 2019. Assessing the feasibility of forest plantation of native species: A case study of Agathis dammara and Eusideroxylon zwageri in Balikpapan, East Kalimantan, Indonesia. Biodiversitas 20: 2453-2461. Plantation forest using native species is very important effort to support biodiversity conservation. Stil...

Setiawan B, Lahjie AM, Yusuf S, Ruslim Y. 2019. Assessing the feasibility of forest plantation of native species: A case study of Agathis dammara and Eusideroxylon zwageri in Balikpapan, East Kalimantan, Indonesia. Biodiversitas 20: 2453-2461. Plantation forest using native species is very important effort to support biodiversity conservation. Stil...

Abstract.To know the growth analysis of jabon...download IOP Confrence series : earth and enviromental science 270(2019) 012045 doi.10.1088/1755-1315/270/1/012045.the 1st Biennial conferece on tropical Biodiversity.Iop Publising.

Background: The mangrove forests in Balikpapan Bay, Indonesia, have been used as a source of livelihood for local community more than 150 years. Since the natural products of the mangrove forest, such as wood and seafood, are not able to meet the economic needs of the local community, some areas have been converted into brackish water ponds with tr...

This study investigated the roundwood production and profit sharing for Shorea leprosula and Shorea smithiana in case of PT Inhutani I Bukit Bangkirai, Balikpapan. Five research aims pursued in order to better understand the economic valuation of Shorea tree species, are: 1) analyse the increments of woody; 2) identify the age of trees reached the...

Currently, the wood industry in Indonesia is facing a lot of problems. The most annoying problem which has to be solved immediately is the decreasing quantity of wood resources as well as the imbalance between the demand and supply of forest wood products as a result of the unsynchronized policy of forest management and wood industry development in...

The use of cultural significance index (CSI), as a tool to calculate the use value of plants, is a growing trend in quantitative ethnobotany research. This study was aimed to measure the CSI of 24 edible plants species, using the valuation method of "Cultural Food Significance Index, CFSI by Pieroni (2001)", to indigenous people in Muara Lawa, Kuta...

Abstrak Untuk mengetahui analisispertumbuhan Gmelina (Gmelina alborea.Roxb) dan Mahoni (Swietenia magrophylla.King). Maka perlu melihat pertumbuhan pada periode tertentu dimana suatu saat tertentu pertumbuhan akan menurun sehingga menjadi bahan pertimbangan dalam pemeliharaan bisa dilakukan dengan sangat evektif dan pertimbangan untuk melakukan pem...

Background: The mangrove forests in Balikpapan Bay, Indonesia, have been used as a source of livelihood for local community more than 150 years. Since the natural products of the mangrove forest, such as wood and seafood, are not able to meet the economic needs of the local community, some areas have been converted into brackish water ponds with tr...

The mangrove forests in Balikpapan Bay, Indonesia, have been used as a source of livelihood for local community more than 150 years. Since the natural products of the mangrove forest, such as wood and seafood, are not able to meet the economic needs of the local community, some areas have been converted into brackish water ponds with traditional aq...

ABSTRAK Analisis Produksi Kayu Bulat dan Peluang Usaha Bagi Hasil Jenis Shorea leprosula Dan Shorea smithiana di PT Inhutani I Bukit Bangkirai Balikpapan. Penelitian ini bertujuan untuk mengetahui simulasi riap pertumbuhan, tingkat pengembalian nominal dan kelayakan keuntungan profit sharing secara konvensional Shorea leprosula dan Shorea smithiana...

Lahjie AM, Lepong A, Simarangkir BDAS, Kristiningrum R, Ruslim Y. 2018. Financial analysis of dipterocarp log production and rubber production in the forest and land rehabilitation program of Sekolaq Muliaq, West Kutai District, Indonesia. Biodiversitas 19: 677-686. The Dayak community of East Kalimantan in the last decade has begun to develop prod...

Tengkawang merupakan tanaman khas iklim tropika basah, menjadi salah satu bukti keanekaragaman hayati di Indonesia, khususnya di Pulau Kalimantan. Keberadaan tengkawang sangat bermanfaat untuk meningkatkan perekonomian masyarakat. Era keemasan tengkawang yang menjadi maskot flora Propinsi Kalimantan Barat itu, kini telah memudar seiring laju defore...

Some research on human relationships with forests shows that human activities for the forests are sufficient to meet demand or to meet demand. Both will directly or indirectly change the perceptions of the people who exploit them against the forests being utilized. Setulang community one of the community groups that intensively utilize NTFP as one...

Hutauruk TR, Lahjie AM, Simarangkir B.D.A.S., Aipassa MI, Ruslim Y. 2018. The prospect of the utilization of Non-Timber Forest Products from Setulang Village forest based on local knowledge of the Uma Longh community in Malinau, North Kalimantan, Indonesia. Biodiversitas 19: 421-430. The establishment of Village Forest status gives local people ass...

Winarni B, Lahjie AM, Simarangkir B.D.A.S., Yusuf S, Ruslim Y. 2018. Forest gardens management under traditional ecological knowledge in West Kalimantan, Indonesia. Biodiversitas 19: 77-84. Local wisdom of Dayak Kodatn people in West Kalimantan in forest management shows that human and nature are in one beneficial ecological unity known as Traditio...

Lahjie AM, Isminarti, Simarangkir B.D.A.S., Kristiningrum , R, Ruslim Y. 2018. Community forest management: Comparison of simulated production and financial returns from agarwood, tengkawang and rubber trees in West Kutai, Indonesia. Biodiversitas 19: 126-133. Research was conducted in planted forests of agarwood (Aquilaria spp.) and tengkawang (Sh...

ABSTRACT Cultivated agarwood commodity is currently preferred by many people. Threefore, research on propagation of the agarwood forming fungi to increase agarwood productivity needs to be conducted. This study was aimed to determine the effectiveness of Fusarium sp. in some media and treatments to increase the agarwood formation. This study was co...

Tengkawang is a typical plant to wet tropical climate that becomes a proof for Indonesia's biodiversity, especially in Kalimantan Island. The existence of tengkawang is extremely beneficial to improve the local's economy. Now, the Golden Era of tengkawang which becomes flora mascot of West Kalimantan Province has faded as deforestation and increase...

Sarjono A, Lahjie AM, Simarangkir BDAS, Kristiningrum R, Ruslim Y. 2017. Carbon sequestration and growth of Anthocephalus cadamba plantation in North Kalimantan, Indonesia. Biodiversitas 18: 1385-1393. Forest plantation of Jabon (Anthocephalus cadamba) plays many important roles for the primary source of timber production and also the carbon absorp...

Apuy M, Lahjie AM, Simarangkir B.D.A.S, Ruslim Y, Kristiningrum R. 2017. Traditional plants in forest gardens of West Kutai, Indonesia: Production and financial sustainability. Biodiversitas 18: 1207-1217. Our research on the first generation forest gardens (munaan) in West Kutai District, Indonesia, aimed (i) investigating the cultivation and the...

Winarni B, Lahjie AM, Simarangkir B.D.A.S, Yusuf S, Ruslim Y.2017. Tengkawang cultivation model in community forest using agroforestry systems in West Kalimantan, Indonesia. Biodiversitas 18: 765-772. Tengkawang is the flora mascot of West Kalimantan and has long been supporting the life of people around the forest. Its fruit can be processed into...

Sustainable coffee plantation emphasizes the concept that is able to provide services that can improve the quality of the environment and the ecosystem as a conservation efforts. Arabica coffee plants do not need full sunlight that they are planted according to agroforestry system which covers simple mix system to complex system such as forest. Sha...

The decline in the quality and quantity of natural forests requires plantation forests as timber suppliers. Jabon is one type of fast growing plant that is expected to meet national wood demand because the type jabon has a fast growing nature and quality of wood is relatively the same as sengon. Some of the advantages of jabon are: rapid growth, ad...

Muliadi M, Lahjie AM, Simarangkir B.D.A.S., Ruslim Y. 2017. Bioeconomic and enviromental valuation of dipterocarp estate forest based on local wisdom in Kutai Kartanegara, Indonesia. Biodiversitas 18: 401-408. Research was conducted in the dipterocarp estate forest in Kutai Kartanegara District, East Kalimantan Province, Indonesia and aimed (i) to...

Teknik Agroforestri memberikan gambaran garis besar mengenai pengelolaan lahan khususnya sistem agroforestri di asia dan mempunyai misi untuk peningkatan produktivitas lahan bagi kesejahteraan masyarakat dalam penerapan ekonomi kerakyatan.

Eucalyptus pellita is often grown in monoculture, can be susceptible to disease whether grown in the nursery or the field. Currently in the plantation of PT Surya Hutani Jaya, Sebulu is developing E. pellita, derived from seed and clonal. The results were then called family. To determine the benefits to trees, the company deliberately does not pres...

The suitable sunlight environment for cultivation of vanilla by agroforestry in an equatorial region was investigated. The cultivation required shade, and the canopies of crop trees and support trees performed that function. Enough shade by the canopies of these trees kept the sunlight intensity on vanilla colony lower than 30klx. The thick crop-tr...

The purpose of this research to determine the type of crops cultivated by people in Community Forest in Sungai Wain Protection Forest. Purposive sampling, interviews and field observations were used to obtain primary data. The results showed that the types of annuals crops that are grown are banana, rice, maize, ginger, celery, and others, and the...

Gaharu dikenal dengan nama dagang agarwood, aloewood atau eaglewood. Di Indonesia, perdagangan dimulai sejak masa penjajahan belanda dengan bentuk produk bahan mentah (raw material). Produksi gaharu mengalami penurunan dari tahun ke tahun untuk itu perlu adanya bududaya lanjutan dan jaminan pasar yang jelas dari pemerintah. Penelitian ini dilakukan...

Gnetum gnemon L. (Gnetales) forms hardwood-like secondary xylem in its trunks and branches although it is a gymnosperm. The present study tested the surface growth stress in relation to anatomical and chemical properties of the secondary xylem in inclined and vertical stems of G. gnemon using morphological and chemical composition analyses. Seconda...

This research conducted in ex PT ITCI KU. This research aims (1) to measure dipterocarp increment and non dipterocarp in logged over area, (2) to measure the increment of restoration plant (3) to measure bioeconomic and environment based on local wisdom. This research has result that the increment of dipterocarp and non dipterocarp does not guarant...

The purpose of this research are 1) to find out the increment of former forest of dipterocarpaceae and non dipterocarpaceae, 2) to know the increment of dipterocarpaceae as recovery plant at PT ITCI Kartika Utama, East Kalimantan Province, RSSI or Indonesia restoration silvicultural system as a method. The object of this research are the increment...

This study aims to determine (1) increment logged-over stands dipterocapaceae and non dipterocapaceae and (2) dipterocapaceae stands increment as recovery plant in Ex. PT ITCI Kartika Utama East Kalimantan Province with Indonesia Restoration Silvicultural System (RSSI) Method.

Penelitian ini bertujuan untuk menganalisis (1) simulasi produksi kayu bulat dan (2) nilai harapan lahan Shorea leavis di Bukit Bangkirai Kecamatan Samboja Kabupaten Kutai Kartanegara.

Penelitian ini bertujuan untuk menganalisis (1) simulasi produksi kayu bulat dan (2) nilai harapan lahan jati solomon di Lempake, Tanah Merah Samarinda Provinsi Kalimantan Timur.

A wood block often changes its original dimension when it is kept in hot water. This is because the locked-in component of the growth stress is released by hygrothermal softening of the cell wall matrix. However, it is still unknown whether or not heating is a necessary requirement for the release of the visco-elastic locked-in component of the gro...

Rattan industry production of Central Sulawesi reaches 60 percents of national production in Indonesia. Rattan is easy to be cultivated, harvested, transported, stored, easy to sell and easy to get cash. The rattan products have some advantages compared with other forestry industrial raw materials, since the products relatively have cheaper cost, s...

Vanilla as an export commodity has a role to gain the devisa. It gets a special concern in its development while agar wood is a one of commercial valuable market commodity Hasil Hutan Bukan Kayu (HHBK). That's why it needs to cultivate with agroforestry system.This research aims to find the production of vanilla and maximum increment of agar wood a...

The objective of this study was to find out the optimum production of vanilla and the maximum increment of agar wood cultivated in an agroforestry system and to perform financial analysis to the system. This research conducted in Bukit Raya Village, Kutai Kartanegara Regency, East Kalimantan Province. Method of this research conducted by using theo...

Tree growth stress (GS) consists of an elastic component and a viscoelastic locked-in component. The elastic component is released instantaneously by cutting wood, whereas the locked-in component remains. The latter can be released by hot water treatment, which is known as hygrothermal recovery (HTR). In this paper the mechanism behind HTR is descr...

Coal mining has changed natural landscapes and is more likely to damage the environment. Based on this premise, a research on post-mining land use with respect to fodder conservation in the areas under forest stands was conducted. The purpose of this research was to determine the use or utilization of the post mining land under forest stands of PT...

This research was based on the existence of forestland which had a rather bad degradation, as indicated by the reduced area of forest in East Kalimantan Province, including Kutai Kartanegara Regency due to the natural and human activities. The forest land management by using the agroforestry landscape system was generally profitable for the welfare...

This research aims to analyze the development of various kinds of fast growth, semi-fast growth, and slow growth plan from the aspects of economicals and ecologic. The economical aspect is related to financial properness; meanwhile ecologic aspect is related to the amount of carbon produced. The results show that the maximum growth of Paraserianthe...

The factors of wood scarcity were the longtime ago exploitation and the high demand of wood for export and import which may not always be relied on the supply from natural forest. To solve, it needed the development of forest planting industry by planting fast and slow grows plant through the expectation value of land. The purposes of this study we...

The research concludes that the optimal revenue from forestry plantations in 2 models a combination of plants, from the combination of the two models combined model 1 has the biggest advantage is Rp2.655.167.000, -. This means that if the head of household has a land area of 20 ha of income per month is Rp6.125.423, - or Rp306.271, - per hectare. O...

This study aims to determine the optimal revenue from wood lamina that afforded by PT Samtraco produced are block Laminating, Finger Joins Laminating, Finger Joins Laminating Board, Solid, and Beams, to determine the output of the combination of business models so that the wood lamina production facilities can be used up. Location the study in the...

The purpose of this research is to know the decreasing phenomena, the causal factors and the impacts of the forest’s wide reducing cases, usages, risks and problems due to the Indonesian District Autonomy Policy to the life of the people in Barong Tongkok village, West Kutai district, East Kalimantan province, Indonesia. The research method conduc...

Telah terjadi kelangkaan bahan baku kayu hutan alam akibat dari over exploitasi pada masa lalu. Permintaan produk kayu khususnya kayu lapis masih menjadi primadona di banding industri kayu lainnya. Peluang besar untuk memenuhi supply kayu dengan memberdayakan masyarakat untuk ikut serta mensupply industri kayu ex.sengon dan atau parica. Revitalisas...

This research was conducted in Tenggarong Seberang Sub Disrtrict of Kutai Kartanegara East Kalimantan province since in the year 2003. The Gaharu corp were inoculated start in 5 years and it done step by step until 8 years old. The Gaharu plant increment was reached to 10,5 m3/ha/year at the age to 15 years. The Gaharu estimation products were at t...

This report provides a fidnginds from field studies in Diak Lay , Ben Hes, and Datarban communities in East Kalimanatan. The study describes indigenous forest management practices of Dayak communities, as well as challenges they face from drivers of deforestation including industrial timber estates that expanded in the region in the 1990s.

The Kenyah Dayak people began to migrate from the isolated area to the Mahakam basin in the early 1950's. As the Kenyah people migrate downstream, infiltration of monetary economy into the village increases, which leads to changes of life style, social structure such as work organization and mutual aid system in daily life, and so on. In the course...