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2. Woody species structure and regeneration status in Keruing (Dipterocarpus spp.) habitat, Tangkahan Gunung Leuser National Park.

Author

Susilowati, Arida, Elfiati, Deni, Hidayat, Asep, Sinaga, Mohammad Zulham Efendi, Larekeng, Siti Halimah, Riniarti, Melya, Hadi, Adhi Nurul, Ginting, Ida Mallia, Iswanto, Apri Heri, Rachmat, Henti Hendalastuti, Zaitunah, Anita, and Mawaddah, Nafisah

Subjects
*NATIONAL parks & reserves, *FOREST degradation, *HABITAT destruction, *SPECIES, *JUDGMENT sampling
Abstract

Gunung Leuser National Park (Gunung Leuser NP) is a conservation region in Indonesia with a relatively high diversity of flora and fauna. One of the potential species found in Gunung Leuser NP is Keruing. Keruing or Dipterocarpus spp. known as potential of wood and non wood producers with a high economical value and is often a target for exploitation. Habitat destruction and regeneration problems also threatened the species, including associated species with the keruing. The objective of this study were to determine woody species stand structure and regeneration status in Tangkahan forest, Gunung Leuser NP. This research was conducted by purposive sampling method which the plot located based on the presence of keruing. A total of 110 plots were employed for this purpose. Based on the results, the stands in Tangkahan forest formed an inverted J pattern, which is a common structure in natural forests. Individuals with a diameter of 10 cm dominated stands, whereas trees with a diameter lower that 60 cm were the least frequent. The dominance of individual trees in the medium to low diameter class indicates that the forest is still in the early stages of development The vertical structure of the trees at the research location shows that they are mostly from stratum C with 171 individuals, that indicated forest condition is in good condition. The status of woody species regeneration status in the research location is quite variable, with 23 species (34.84 %) in good status, four species (6.06%) in fair status, ten species (15.15%) with poor status, 21 species (31.81 %) in none status, and eight species (12.12%) in new regeneration status. The population structure and regeneration patterns show significant forest degradation due to anthropogenic disturbances. Therefore, conservation efforts are still needed especially for high value species. [ABSTRACT FROM AUTHOR]

Published
2023
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4. Iptek Penguatan Ketahanan Pangan dengan Program Food Estate Sistim Agrosilvopastural di Humbang Hasundutan

Author

Syahputra, OK Hasnanda, primary, Hartono, Rudi, additional, Manurung, Harisyah, additional, Hakim, Luthfi, additional, Sucipto, Tito, additional, Iswanto, Apri Heri, additional, Sutiawan, Jajang, additional, Samsuri, Samsuri, additional, Zaitunah, Anita, additional, Purwoko, Agus, additional, Arinah, Hafizah, additional, Harahap, Moehar Maraghiy, additional, Ulfa, Mariah, additional, Rambey, Ridahati, additional, Fadhilla, Suri, additional, Susilowati, Arida, additional, Elfiati, Deni, additional, and Rangkuti, Ahmad Baiquni, additional

Published
2022
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5. Culturable endophytic fungal assemblages from Styrax sumatrana and Stryax benzoin and their potential as antifungal, antioxidant, and alpha-glucosidase inhibitory resources

Author

Elfiati, Deni, primary, Faulina, Sarah Asih, additional, Rahayu, Laras Murni, additional, Aryanto, Aryanto, additional, Dewi, Rizna Triana, additional, Rachmat, Henti Hendalastuti, additional, Turjaman, Maman, additional, Royyani, Mohammad Fathi, additional, Susilowati, Arida, additional, and Hidayat, Asep, additional

Published
2022
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6. Integrasi Agroforestri dan Sistem Budidaya Lebah Madu (Trigona Sp.) dalam Penguatan Food Estate di Humbang Hasundutan.

Author

Hakim, Luthfi, primary, Sucipto, Tito, additional, Iswanto, Apri Heri, additional, Sutiawan, Jajang, additional, Hartono, Rudi, additional, Manurung, Harisyah, additional, Samsuri, Samsuri, additional, Zaitunah, Anita, additional, Syahputra, OK Hasnanda, additional, Purwoko, Agus, additional, Arinah, Hafizah, additional, Harahap, Moehar Maraghiy, additional, Ulfa, Mariah, additional, Rambey, Ridahati, additional, Fadhilla, Suri, additional, Susilowati, Arida, additional, Elfiati, Deni, additional, and Rangkut, Ahmad Baiquni, additional

Published
2022
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31. Effect of Talaromyces pinophilus and SP36 on Phosphate Available and Potato (Solanum tuberosum L) Production on Andisol Impacted by Mount Sinabung Eruption, North Sumatera. Indonesia.

Author

sembiring, Mariani, Elfiati, Deni, Sutarta, Edi Sigit, Sabrina, T., sembiring, Mariani, Elfiati, Deni, Sutarta, Edi Sigit, and Sabrina, T.

Abstract

Mount Sinabung erupted in September 2013, the volcanic ash is falling volcanic material ejected into the air during an eruption . Andisol formed from volcanic ash , which is rich in minerals Al and Fe which can bind phosphates making it unavailable to plants. In vitro screening of fungal from surrounding horticulture land, on their ability to dissolve phosphate showed that

Published
2015

32. Pemanfaatan Kompos Tandan Kosong Sawit Sebagai Campuran Media Tumbuh Dan Pemberian Mikoriza Pada Bibit Mindi (Melia azedarach L.)

Author

Elfiati, Deni and Siregar, Edy Batara Mulya

Subjects
fungi
Abstract

The purpose of this study was to determine the effect of empty fruit bunch compost as growing medium mixture and the provision of mycorrhizae on seedling growth mindi (Melia azedarach L.). Research carried out in the field experiment Faculty of Agriculture and Soil Biology Laboratory, Department of Soil Science, Faculty of Agriculture, University of North Sumatra. The design used was completely randomized factorial design 2 factors namely the composition of medium growth and mycorrhizal application. The results showed that the interaction between these two factors do not give a significant difference. Application of mycorrhizae gave significantly effect to percent mycorrhizal colonization. The composition of growth media had significant effect on height, diameter increment, plant dry weight and percent mycorrhizal colonization.

Published
2010

33. LAJU INFILTRASI PADA BERBAGAI TIPE KELERENGAN DIBAWAH TEGAKAN EKALIPTUS DI AREAL HPHTI PT. TOBA PULP LESTARI SEKTOR AEK NAULI

Author

Elfiati, Deni and Delvian

Abstract

ABSTACTThe objective of this research is know rate of infiltration on several slope. The research was carried out on December 2008 to January 2009 at area of HPHTI PT. Toba Pulp Lestari Tbk. Aek Nauli Sector. The research was use double ring infiltrometer to measure soil infiltration with three replication on each slope. The measurement was done in every five minute. The result of research show that the highest of infiltration rate and infiltration capacity was happened on slope 8-15%, ie 144 cm/hour and 24 cm/hour, while the lowest of infiltration rate and infiltration capacity was happened on slope 25-40%, ie 52 cm/hour and 16 cm/hour.

Published
2010

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