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ENVIRONMENTAL FACTORS AFFECTING PRODUCTIVITY OF TWO INDONESIAN VARIETIES OF BLACK PEPPER (PIPER NIGRUM L.) Yudiyanto, Yudiyanto; Rizali, Akhmad; Munif, Abdul; Setiadi, Dede; Qayim, Ibnul
AGRIVITA, Journal of Agricultural Science Vol 36, No 3 (2014)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v36i3.456

Abstract

Black pepper plantation area in Lampung province (the biggest producer area within Indonesia) has decreased from time to time, which might be related to unfavourable environmental condition. The aim of this study was to assess which environmental factors are positively or negatively correlated with productivity in particular yield of two local varieties of black pepper plant (Natar 1 and Natar 2) in Lampung province.  Two observational studies were carried out in the present study i.e. phenological development and productivity of black pepper productivity in related to various environmental factors. Our results showed that productivity of two varieties were significantly affected rainfall, light intensity and micro humidity. Dry matter yield was positively correlated with rainfall, both in Natar 1 and Natar 2. It was concluded that among environmental factors affecting productivity of black pepper, rainfall intensity was the most influencing factor with a positive relationship with the productivity.Keywords: Black pepper, climate, cultivar, environment, Indonesia
ABILITY OF ORNAMENTAL PLANTS IN ADSORBING DUST FROM VEHICLES (CASE STUDY: BUMI SERPONG DAMAI) Effendy, Sobri; Suchesdian, Nadita Zairina; Qayim, Ibnul
Agromet Vol. 31 No. 1 (2017): JUNE 2017
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j.agromet.31.1.22-30

Abstract

This research measured several vegetations that were planted in Bumi Serpong Damai, South Tangerang to absorb dust pollutions produced by vehicles. The locations for monitoring were divided based on traffic levels: high, medium and low. We measured the pollution based on two approaches i.e. measuring every four hours and a daily measurement. Based on our monitoring, each species will have different feedbacks to dust pollution at various traffic conditions. We found that species of Heliconia was able to absorb the dust at the top for high traffic condition, whereas Kaca Piring is effective for medium traffic. Our findings revealed that monitoring dust should be frequent at least four hours/day, and selection of species for reducing dust pollution should consider the leave structure. 
VEGETATION DENSITY, ROOT ARCHITECTURE MODEL, AND HYDRODYNAMIC SIMULATION RHIZOPHORA APICULATA BL. IN BONE BAY, SOUTH SULAWESI Rustam, Aswar; Qayim, Ibnul; Erizal, .
Media Konservasi Vol. 22 No. 1 (2017): Media Konservasi Vol. 22 No. 1 April 2017
Publisher : Deparement of Forest Resources Conservation and Ecotourism - Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (280.528 KB) | DOI: 10.29244/medkon.22.1.19-25

Abstract

Mangrove is the only ecosistem that grows and develops in the coastal area. This study was conducted to analyze the mangrove forest vegetation to create a simulation of the root sistem of Rhizophora apiculata Bl. related to its ability in the process of hydrodynamic fluid of seawater in the Lompo village, District Awangpone, Bone Regency, South Sulawesi. Criteria that used as a model reference had minimum age approximately five years and minimum height of about 2 m. The variables that measure were height, diameter, and length of the roots. The parameters of the simulation are the average speed of sea level, the dynamic pressure of seawater, as well as drag coefficient of Gulf of Bone. Based on this research, vegetation area with highest density located at second kilometer, medium density located at first kilometer, and the lowest density located at third kilometer. The average velocity of seawater, the lowest is in the natural cropping pattern of highest density, meanwhile the highest is in the parallel cropping pattern of lowest density. Dynamic pressure, the lowest is in the natural cropping pattern of highest density, meanwhile the highest is in the parallel cropping pattern of lowest density. The drag coefficient, the highest is in the natural cropping pattern of highest density, meanwhile the lowest is in the parallel cropping pattern of lowest density. Keywords: drag coefficient, hydrodynamics, mangrove, Rhizophora apiculata Bl., simulation
NUTRIENT CONTENT OF SEAGRASSS ENHALUS ACOROIDES LEAVES IN BARRANGLOMPO AND BONEBATANG ISLANDS: IMPLICATION TO INCREASED ANTRHROPOGENIC PRESSURE Amri, Khairul; Setiadi, Dede; Qayim, Ibnul; Djokosetianto, D
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 16, No 4 (2011): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (742.267 KB) | DOI: 10.14710/ik.ijms.16.4.181-186

Abstract

Seiring dengan peningkatan jumlah penduduk di daerah pesisir, tekanan terhadap ekosistem pantai semakin meningkat pula.  Untuk mengetahui dampak dari aktifitas anthropogenik terhadap status hara (karbon, nitrogen dan fosfor) pada lamun telah dilaksanakan penelitian pada dua pulau di Kepulauan Spermonde yakni Pulau Barranglompo dan Bonebatang.  Kedua pulau ini mendapat tekanan anthropogenik berbeda. Sampel diambil dari daun lamun Enhalus acoroides pada tiga stasiun dengan jarak berbeda dari garis pantai pada masing-masing pulau.  Hasil pengukuran hara menunjukkan bahwa konsentrasi nitrogen di Pulau Barranglompo jauh lebih tinggi dibandingkan Pulau Bonebatang.  Nilai rasio C:N yang lebih rendah dan nilai rasio N:P yang lebih tinggi di Pulau Barranglompo memperkuat hal ini. Perbedaan ini mengindikasikan pengaruh dari pengayaan hara akibat aktifitas anthropogenik yang semakin meningkat. Hal ini didukung oleh nilai Total Padatan tersuspensi yang jauh lebih tinggi di Pulau Barranglompo dibandingkan Pulau Bonebatang. Aktifitas anthropogenik yang paling potensial mempengaruhi komposisi hara di Pulau Barranglompo adalah pembuangan sampah rumah tangga dan aliran limbah cair dari rumah penduduk di sekitar pantai. Kata kunci: lamun, hara, rasio C:N:P, aktifitas anthropogenik, Barranglompo, Bonebatang As human population increase in coastal areas, significant pressure to the coastal ecosystem increase as well.  In order to reveal possible impacts of anthropogenic activities to the nutrient status of seagrasses, a study has been done in two small islands within Spermonde Archipelago i.e. Barranglompo and Bonebatang Islands. Currently, these two islands are facing different anthropogenic pressure.  Samples of seagrass Enhalus acoroides were collected from three stations based on their different distances from the shoreline.  Results of the nutrient measurements showed that nitrogen concentrations in Barranglompo Island were significantly higher than those in Bonebatang Island.  This was supported by lower C:N ratios and higher N:P ratios in Barranglompo Island.  This difference indicated influence of nutrient enrichment due to increased anthropogenic activities.  Significantly higher Total Suspended Solid (TSS) values were also a strong evidence of this process.  Potential anthropogenic activities affecting nutrient composition in Barranglompo Island are domestic sewage disposal and drainage of liquid household sewage. Key words: seagrass, nutrient, C:N:P ratio, anthropogenic activities, Barranglompo,  Bonebatang
PERUBAHAN STRUKTUR DAN KEPADATAN TRIKOMATA NON GLANDULER SERTA LUAS DAUN KAKAO (THEOBROMA CACAO L.) PADA PERLAKUAN STRES KEKURANGAN AIR Prihastanti, Erma; T, Soekisman; Soepandi, Didie; Qayim, Ibnul
JURNAL SAINS DAN MATEMATIKA Volume 17 Issue 1 Year 2009
Publisher : JURNAL SAINS DAN MATEMATIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5288.63 KB)

Abstract

ABSTRACT--Cacao  is the one  important  crop in Indonesia. Water  stress  is perhaps  the major factor  limiting  crop growth. Plant responses to water stress  include morphological of biochemical changes. This reserch was aimed studying  strtructure and density of non glanduler  trichomes, and leaf area on cacao leaves on drought experiment.  The drought studies used throughfall displacment experiment  (TDE). The result show that cacao leaves have non glanduler trichomes type stellat. Non Glanduler trichomes were distributed throughtout the vein of leaves with distribution in abaxial parts of the leaves. TDE give non significant effect to trichomes density and Ieaf area. The highest trichomes  happened  on March 2008  6.9861/cm2. Leaf area on shade Ieaves  (273,56 cm2) more higher than sun leaves  (235,50 cm2). Keyword : Trichomes  non  glanduler, cacao leaves, leaf area
FENOLOGI DAN DINAMIKA KANDUNGAN KLOROFIL PADA PEMBUNGAAN DUA SPESIES BELIMBING HUTAN (Averrhoa dolichocarpa DAN Averrhoa leucopetala) Mangunah, Mangunah; Qayim, Ibnul; Astuti, Inggit Puji
Buletin Kebun Raya Vol 16, No 2 (2013): Buletin Kebun Raya Vol. 16 (2) Juli 2013
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

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Abstract

Averrhoa dolichocarpa is a wild starfruit from Papua and Averrhoa leucopetala is a wild starfruit from Gorontalo. Both starfruits have unique characters of the leaves, inflorescence, flowers, and fruits. The study was conducted from February 2012 to May 2012 by observing the wild starfruits collections of Bogor Botanical Garden. Innitiation of Averrhoa dolichocarpa inflorescence takes 8-14 days, the small bud growing in 11-15 days, after one day the large bud will open and the anthesis last after 3 days. The fruit will develop and mature after 40-45 days. The flower and fruit drop rate is quite high, mostly caused by strong wind. The chlorophyll content of the leaves are very dynamic and influence by the environment and the wide of the canopy. Whereas initiation of Averrhoa leucopetala inflorescence needs 30-34 days, the small bud growing in 12-15 days, the large flower bud will open after 1 day, anthesis last after 5 days, and the fruit development needs 40-42 days to mature. Anthesis of the flowers occurred at 4:00 to 6:00 a.m. The flower and fruit drop rate is also quite high. The chlorophyll content is more static and tends to increase when the fruit developed.
FENOLOGI DAN DINAMIKA KANDUNGAN KLOROFIL PADA PEMBUNGAAN DUA SPESIES BELIMBING HUTAN (Averrhoa dolichocarpa DAN Averrhoa leucopetala) Mangunah, Mangunah; Qayim, Ibnul; Astuti, Inggit Puji
Buletin Kebun Raya Vol 16, No 2 (2013): Buletin Kebun Raya Vol. 16 (2) July 2013
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

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

Abstract

Averrhoa dolichocarpa is a wild starfruit from Papua and Averrhoa leucopetala is a wild starfruit from Gorontalo. Both starfruits have unique characters of the leaves, inflorescence, flowers, and fruits. The study was conducted from February 2012 to May 2012 by observing the wild starfruits collections of Bogor Botanical Garden. Innitiation of Averrhoa dolichocarpa inflorescence takes 8-14 days, the small bud growing in 11-15 days, after one day the large bud will open and the anthesis last after 3 days. The fruit will develop and mature after 40-45 days. The flower and fruit drop rate is quite high, mostly caused by strong wind. The chlorophyll content of the leaves are very dynamic and influence by the environment and the wide of the canopy. Whereas initiation of Averrhoa leucopetala inflorescence needs 30-34 days, the small bud growing in 12-15 days, the large flower bud will open after 1 day, anthesis last after 5 days, and the fruit development needs 40-42 days to mature. Anthesis of the flowers occurred at 4:00 to 6:00 a.m. The flower and fruit drop rate is also quite high. The chlorophyll content is more static and tends to increase when the fruit developed.
SAGO PALM (METROXYLON SPP.) IS A TROPICAL PLANT ADAPTED TO MARGINAL LAND SUCH AS FRESH WATER SWAMP, PEAT SWAMP OR BRACKISH WATER.  THE OBJECTIVE OF THE RESEARCHE IS TO IDENTIFY PHYSICAL AND CHEMICAL HABITAT CHARACTERISTICS OF SAGO PALM IN THE SERAM ISLAND, MALUKU.  THE RESEARCH WAS CONDUCTED IN NINE MONTHS FROM MARCH TO NOVEMBER 2009.  THE OBSERVATION WAS CONDUCTED AT THREE SAMPLES AREA, NAMELY LUHU (WEST SERAM DISTRICT), SAWAI (CENTRAL MALUKU DISTRICT), AND WERINAMA (EAST SERAM  DISTRICT). Botanri, Samin; Setiadi, Dede; Guhardja, Edi; Qayim, Ibnul; Prasetyo, Lilik B.
Forum Pasca Sarjana Vol. 34 No. 1 (2011): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

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Abstract

Sago palm (Metroxylon spp.) is a tropical plant adapted to marginal land such as fresh water swamp, peat swamp or brackish water.  The objective of the researche is to identify physical and chemical habitat characteristics of sago palm in the Seram island, Maluku.  The research was conducted in nine months from March to November 2009.  The observation was conducted at three samples area, namely Luhu (West Seram District), Sawai (Central Maluku District), and Werinama (East Seram  District).  Soil and water samples were taken at samples area and analyzed at Soil Research Center Laboratory, Bogor.  Result showed that sago palm at the Seram island can be found at four different habitat types, namely: 1) upland habitat/dry land, 2) temporary inundated fresh water swamp, 3) temporary inundated brackish water, and 4) permanent inundated fresh water swamp.  Soil texture of these habitats characterized by clay-loam and silty-clay with average bulk density of about 1.20.  The soil has acidic reaction that consists of medium soil organic and having medium cation exchange capacity (CEC).  Except for Fe and Alwhich were high, the nutrient content of the soil was very low. Salinity of water was less than 1.0 ppt (part per thousand).  Nitrate (NO3-), phosphate (PO43-) and other cation such us NH4+, K+, Ca2+, and Mg2+ were found relatively high in water.  Micro climate condition under sago stands (clump of Sago) such us temperature, relative humidity, and sun radiation intensity are low with very narrow fluctuation.  Micro-climate conditions were characterized by temperature ranging from 22,69oC to 23,94oC, meanwhile relative humidity ranging from 87,97 to 91,60%.  In case of  sun light intensity at near clump of sago palm reached of about 206,53 lux (12,40%).   Keywords: habitat type, Metroxylon spp., land, micro climate, Seram Island
KANDUNGAN, RESORPSI N DAN P SERTA SPECIFI C LEAF AREA DAUN KAKAO (THEOBROMA CACAO L.) PADA CEKAMAN KEKERINGAN Prihastanti, Erma; Tjitrosemito, Soekisman; Sopandie, Didy; Qayim, Ibnul; Leuschner, Christoph
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 39 No. 1 (2011): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (150.411 KB) | DOI: 10.24831/jai.v39i1.13191

Abstract

Plant nutrient absorptions depend on their environment and plants? stage of development. Beside from soil, nutrient absorption also proceed through resorption in leaves. The resorption efficiency varies based on types of habitat. Drought stress also influences the efficiency of nutrient resorption, growth rate, and plant development. The purpose of this research was to study the change of nitrogen (N) and phosphorus (P) content and leaf resorption value of N and P, and specific leaf area of 6-years old cacao grown under drought stress. Research was carried out in a cacao plantation with 7-years old Gliricidia sepium Jacq. as shading trees. The results showed that drought stress with Troughfall Displacement Experiment (TDE) system did not affect the content and resorption level of N and P of cacao leaves. However, N resorption of cacao leaves tended to increase while P resorption decreased. Cacao plants experienced drought stress have the ability to resorp leaf N for 46.64-50.63%, leaf P for 47.98-58.40%, whereas, the control plants had the leaf N resorption of 45.05-52.97%, and leaf P resorption of 36.64-44.10%. Drought stress for 13 months on 6-years old cacao did not affect specifi c leaf area.
STUDI EKOLOGI TUMBUHAN SAGU (Metroxylon spp) DALAM KOMUNITAS ALAMI DI PULAU SERAM, MALUKU Botanri, Samin; Setiadi, Dede; Guhardja, Edi; Qayim, Ibnul; Prasetyo, Lilik B.
Jurnal Penelitian Hutan Tanaman Vol 8, No 3 (2011): JURNAL PENELITIAN HUTAN TANAMAN
Publisher : Pusat Penelitian dan Pengembangan Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jpht.2011.8.3.135-145

Abstract

Sagu (Metroxylon spp) merupakan tumbuhan palem tropika basah, memiliki adaptasi kuat untuk tumbuh pada lahan marjinal seperti lahan tergenang air tawar, lahan gambut, dan air payau. Penelitian bertujuan :(1) melakukan analisis untuk menjelaskan sifat pertumbuhan sagu dalam komunitas alami, (2) mengungkapkan preferensi habitat tumbuhan sagu, (3) melakukan analisis interaksi tumbuhan sagu dengan faktor lingkungan, dan (4) mengungkapkan potensi tegakan dan produksi pati sagu. Penelitian berlangsung di tiga wilayah di pulau Seram, Maluku secara keseluruhan, tentu dengan menggunakan sampling, bukan menggunakan metode sensus pada bulan Maret-Nopember 2009. Hasil penelitian menunjukkan bahwa struktur populasi sagu dalam komunitas alami mengikuti pola pertumbuhan muda dengan tingkat kematian pada fase semai sekitar 85. Di Pulau Seram terdapat lima jenis sagu yaitu tuni, makanaro, sylvestre, rotang, dan molat. Sagu tuni merupakan spesies dominan dengan penguasaan habitat mencapai 43,3%. Serta memiliki daya adaptasi yang tinggi pada berbagai tipe habitat. Dalam beradaptasi dengan kondisi habitat tergenang, perakaran sagu mengalami modifikasi arah pertumbuhan menuju permukaan air dengan jumlah yang lebih banyak. Dalam komunitas sagu terjadi asosiasi antarspesifik secara negatif dengan Jaccard indeks < 0,2. Variabel iklim, tanah, dan kualitas air rawa yang memiliki peran kuat dalam pertumbuhan sagu masing-masing adalah intensitas cahaya surya mikro, kapasistas tukar kation (KTK), dan kandungan kalsium air. Di Pulau Seram terdapat potensi populasi rumpun sagu sekitar 3,2 juta rumpun dengan jumlah tegakan fase pohon mencapai 1,5 juta batang. Jenis sagu tuni dan sylvestre merupakan jenis sagu potensial dengan kapasitas produksi masing-masing 566,04 kg dan 560,68 kg/batang.