Rochadi Abdulhadi
Laboratory of Ecological Science, Research Centre for Biolog y, Indonesian Institute of Science

Published : 11 Documents
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TREE COMMUNITY COMPOSITION AND STRUCTURE OF CACAO (THEOBROMA CACAO L.) BASED AGROFORESTRY IN WEST SUMATERA, INDONESIA Santhyami, Santhyami; Basukriadi, Adi; Abdulhadi, Rochadi
Bioeksperimen: Jurnal Penelitian Biologi Vol 6, No 1: Maret 2020
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/bioeksperimen.v6i1.10433

Abstract

The aim of this study is to obtain basic descriptive account of structure and floristic composition of cacao based agroforestry in conserving tree species diversity in West Sumatera. An analysis of the composition and structure of three types of cacao based agroforestry system (AFS) [cacao - rubber (CR), cacao ? coconut (CC) and cacao multistrata (CM)] was conducted in April to June 2017. Data collection was done by using quadrat method of 20 x 20 meter plots with a total of 6 plots on each types of AFS. Herbarium specimens were collected and identified. Among all types of these AFS, CC was the most diverse floristically (H? = 1.02) with the highest total of species (10 species), followed by CM (9 species) and CR (7 species). CM has the highest tree density of 1108 trees per ha and the highest total of basal area (30.53 m2). We also did a comparison of the floristic composition of cacao based AFS with the nearest natural forest from previous study. There was a large decrease in the number of non-cocoa tree species from natural forest to AFS, from 139 to 6-9 species. The only native tree species found both in the forest and AFS is Pterospermum javanicum Jungh. It is concluded that three types of cocoa based AFS in West Sumatera were floristically different with natural forest.
DISTRIBUTION OF Hoya multiflora Blume AT GUNUNG GEDE PANGRANGO NATIONAL PARK, INDONESIA Rahayu, Sri; Kusmana, Cecep; Abdulhadi, Rochadi; Jusuf, Muhammad; Suharsono, Suharsono
Indonesian Journal of Forestry Research Vol 7, No 1 (2010): Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Hoya multiflora is one of the valuable germplasm in Indonesia that has been utilized as ornamental and medicinal plant. This epiphytic plant faces problems in decreasing habitat. As a means for developing a habitat framework for describing the distributions and ecological relations of H.multiflora at Gunung Gede Pangrango National Park, Bogor, Indonesia, ecological study of this species was established over the ranges of altitudes and characteristic vegetation structural types (primary and secondary forest, and plantation) present in the Park. Recognizing the fact that such study requires multidisciplinar y data, this paper explores the evidences from both herbarium sheets and field observations. The result of the study showed that the population of this species was only found at the Bodogol Research Station at elevation of 700 - 900 m above sea level (a.s.l.). Thus, the facts contradict with the evidence from the herbarium sheets of the Herbarium Bogoriense which have presumed that this species has a wide variation of altitudinal range from 20 to 1500 m a.s.l. (Indonesia) or 200 - 1400 m a.s.l. ( Java). The Bodogol’s population showed the clumped type of dispersion (Morisita’s Index = 1.35), which indicated such environment that was characterized by patchy resources. Direction and speed of wind coupled with the topography are ecological factors that affect to the distribution of this parachute typed seeds of the H.multiflora.
DISTRIBUTION OF Hoya multiflora Blume AT GUNUNG GEDE PANGRANGO NATIONAL PARK, INDONESIA Rahayu, Sri; Kusmana, Cecep; Abdulhadi, Rochadi; Jusuf, Muhammad; Suharsono, Suharsono
Indonesian Journal of Forestry Research Vol 7, No 1 (2010): Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/ijfr.2010.7.1.42-52

Abstract

Hoya multiflora is one of the valuable germplasm in Indonesia that has been utilized as ornamental and medicinal plant. This epiphytic plant faces problems in decreasing habitat. As a means for developing a habitat framework for describing the distributions and ecological relations of H.multiflora at Gunung Gede Pangrango National Park, Bogor, Indonesia, ecological study of this species was established over the ranges of altitudes and characteristic vegetation structural types (primary and secondary forest, and plantation) present in the Park. Recognizing the fact that such study requires multidisciplinar y data, this paper explores the evidences from both herbarium sheets and field observations. The result of the study showed that the population of this species was only found at the Bodogol Research Station at elevation of 700 - 900 m above sea level (a.s.l.). Thus, the facts contradict with the evidence from the herbarium sheets of the Herbarium Bogoriense which have presumed that this species has a wide variation of altitudinal range from 20 to 1500 m a.s.l. (Indonesia) or 200 - 1400 m a.s.l. ( Java). The Bodogol’s population showed the clumped type of dispersion (Morisita’s Index = 1.35), which indicated such environment that was characterized by patchy resources. Direction and speed of wind coupled with the topography are ecological factors that affect to the distribution of this parachute typed seeds of the H.multiflora.
DISTRIBUTION OF Hoya multiflora Blume AT GUNUNG GEDE PANGRANGO NATIONAL PARK, INDONESIA Rahayu, Sri; Kusmana, Cecep; Abdulhadi, Rochadi; Jusuf, Muhammad; Suharsono, Suharsono
Indonesian Journal of Forestry Research Vol 7, No 1 (2010): Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/ijfr.2010.7.1.42-52

Abstract

Hoya multiflora is one of the valuable germplasm in Indonesia that has been utilized as ornamental and medicinal plant. This epiphytic plant faces problems in decreasing habitat. As a means for developing a habitat framework for describing the distributions and ecological relations of H.multiflora at Gunung Gede Pangrango National Park, Bogor, Indonesia, ecological study of this species was established over the ranges of altitudes and characteristic vegetation structural types (primary and secondary forest, and plantation) present in the Park. Recognizing the fact that such study requires multidisciplinar y data, this paper explores the evidences from both herbarium sheets and field observations. The result of the study showed that the population of this species was only found at the Bodogol Research Station at elevation of 700 - 900 m above sea level (a.s.l.). Thus, the facts contradict with the evidence from the herbarium sheets of the Herbarium Bogoriense which have presumed that this species has a wide variation of altitudinal range from 20 to 1500 m a.s.l. (Indonesia) or 200 - 1400 m a.s.l. ( Java). The Bodogol’s population showed the clumped type of dispersion (Morisita’s Index = 1.35), which indicated such environment that was characterized by patchy resources. Direction and speed of wind coupled with the topography are ecological factors that affect to the distribution of this parachute typed seeds of the H.multiflora.
SEED BANKS IN A SUBTROPICAL RAIN FOREST Abdulhadi, Rochadi
REINWARDTIA Vol 11, No 1 (1992): Vol. 11 No. 1
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (771.939 KB) | DOI: 10.14203/reinwardtia.v11i1.598

Abstract

The seasonal populations and vertical distribution of seed banks in a subtropical rain foirest were assesed. No seasonal variations were indicated in either the species composition or the size of seed bank over a year period. The number of seeds were 550 - 603 m square, and mostly composed of secondari species. This population decreased with increasing soil depths.
FLORISTIC CHANGES IN A SUB-TROPICAL RAIN FOREST SUCCESSION Abdulhadi, Rochadi
REINWARDTIA Vol 11, No 1 (1992): Vol. 11 No. 1
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (670.474 KB) | DOI: 10.14203/reinwardtia.v11i1.599

Abstract

Floristic changes in a subtropical rain forest were assesed. Three regrowth forests aged 20 years, 50 years and 60 years and an undisturbed forest were sampled. The series of sites sho floristic changes that would be expected in a successional sequence. The regrowth forests were dominated by the secondary species but the primary species occur from the early stage. The oldest regrowth (60 year old-site) was still well short of regaining its original condition.
Cendana (Santalum album ) dan Keanekaragaman Inang Sekundernya Di Daerah Pesisir Kolbano, Nusa Tenggara Timur Wawo, Albert H.; Abdulhadi, Rochadi
JURNAL BIOLOGI INDONESIA Vol 3, No 3 (2002): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (183.651 KB) | DOI: 10.14203/jbi.v3i3.3468

Abstract

ABSTRACTSandalwood (Santalum album ) and diversity of their host secondary in Kolbano Village, Lesser Sunda Island. The population of sandalwood (Santalum album ) declined every year because is not cultivated yet by the local people. Inhibiting factors are not possess the knowledge and skills on sandalwood cultivation especially in host plant of sandalwood comprehension. Forest fire and illegal logging lead to lose of flora diversity and deteriorate of sandalwood growth. Result of this research shows that population of sandalwood in Kolbano Village is very low are four plants in Kampong Fatu Un and seven plants in kampong Spaha. In kampong Fatu Un was found eight species plant that compose to unity formation with sandalwood and seven species of them are secondary host of sandalwood. In kampong Spaha was obtained nine species plant that compose to sandalwood formation and seven species of them are secondary host of sandalwood. The highest distribution frequency of plant in two mentioned kampong was got by leucaena (Leucaena glauca) plant with respectively value 51.28% (Fatu Un) and 53.57 % (Spaha), whereas diversity value belong to Simpson Index were 0.71 (Fatu Un) and 0.64 (Spaha).Key words: Sandalwood, host plant, Kolbano village, Lesser Sunda Island
Penggunaan Botes AHW sebagai Alat Siram Tetes dalam Pembudidayaan Cendana di Kabupaten Belu, NTT Wawo, Albert Husein; Abdulhadi, Rochadi
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 22, No 2 (2005)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2005.22.2.94

Abstract

One of factors  that  causes the failure of the sandalwood cultivation in East Nusa Tenggara Province is drought of seedlings after planting. This research  has been conducted to study the use of Botes-AHW as an equipment of drip watering on sandalwood cultivation and to evaluate the water requirements in seedling growth after planting. The results  showed that   the use of water was more conserved by employing the Botes-AHW in sandalwood cultivation  than the traditional watering system.  The average of water requirements  in seedling growth (several months after planting)  is 10 liters  per seedling per month.
FLORISTIC CHANGES IN A SUB-TROPICAL RAIN FOREST SUCCESSION Abdulhadi, Rochadi
REINWARDTIA Vol 11, No 1 (1992): Vol. 11 No. 1
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/reinwardtia.v11i1.599

Abstract

Floristic changes in a subtropical rain forest were assesed. Three regrowth forests aged 20 years, 50 years and 60 years and an undisturbed forest were sampled. The series of sites sho floristic changes that would be expected in a successional sequence. The regrowth forests were dominated by the secondary species but the primary species occur from the early stage. The oldest regrowth (60 year old-site) was still well short of regaining its original condition.
SEED BANKS IN A SUBTROPICAL RAIN FOREST Abdulhadi, Rochadi
REINWARDTIA Vol 11, No 1 (1992): Vol. 11 No. 1
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/reinwardtia.v11i1.598

Abstract

The seasonal populations and vertical distribution of seed banks in a subtropical rain foirest were assesed. No seasonal variations were indicated in either the species composition or the size of seed bank over a year period. The number of seeds were 550 - 603 m square, and mostly composed of secondari species. This population decreased with increasing soil depths.