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INDONESIA
Agromet
Published by Institut Pertanian Bogor
ISSN : 01263633     EISSN : 2655660X     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Agromet publishes original research articles or reviews that have not been published elsewhere. The scope of publication includes agricultural meteorology/climatology (the relationships between a wide range of agriculture and meteorology/climatology aspects). Articles related to meteorology/climatology and environment (pollution and atmospheric conditions) may be selectively accepted for publication. This journal is published twice a year by Indonesian Association of Agricultural Meteorology (PERHIMPI) in collaboration with Department of Geophysics and Meteorology, Faculty of Mathematics and Natural Sciences, IPB University.
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol. 19 No. 1 (2005): June 2005" : 5 Documents clear
GLOBAL ANALYSIS OF THE RELATIONSHIP BETWEEN PRECIPITATION AND VEGETATION DYNAMICS DERIVED FROM NOAA/AVHRR-NDVI (ANALISIS GLOBAL DINAMIKA CURAH HUJAN DAN VEGETASI BERDASARKAN INDEKS VEGETASI NOAA/AVHRR) Eleonora Runtunuwu; Haris Syahbuddin
Agromet Vol. 19 No. 1 (2005): June 2005
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (917.359 KB) | DOI: 10.29244/j.agromet.19.1.1-11

Abstract

The study of changes in global precipitation patterns is a key element in the ongoing research of climate change. There are also changes that occur over the land surface, such as in vegetation, which are associated with changes in precipitation. However, a better understanding of precipitation- vegetation relationships on various time and space scales is needed.There were many studies on relationship between rainfall to NDVI such as in East Africa1), Bostwana2), Sahel3), Amazon and Northeastern Brazil4), China5), and also in global scale6)7). From those studies, the relation of precipitation and NDVI is complex, such as reported by Kerr8) that its relationship was linear in Senegal, while by Lu5) the relationship was quadratic in China. Additionally, Milich and Weiss3) found that the relationship was inconsistent from the year to the year in Sahel, Africa.Hence, this paper attempts to explore the relationship between climate variables and the vegetation dynamic derived from NOOA/AVHRR-NDVI value, based on either spatial scale or point data. The authors also tried to investigate the possibility to study the global environmental change by using satellite data.
WATER DEFICIT EFFECT ON GROWTH OF YOUNG FAST GROWING TEAK (Tectona Grandis L.F.) (PENGARUH DEFISIT AIR TERHADAP PERTUMBUHAN JATI EMAS MUDA) E. Eliyani; I Handoko; Yonny Koesmaryono
Agromet Vol. 19 No. 1 (2005): June 2005
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (187.915 KB) | DOI: 10.29244/j.agromet.19.1.11-20

Abstract

Teak (Tectona grandis L.f.) has been grown in Indonesia since the beginning of 14th century. Teak forests in Indonesia are found mainly on the island of Java, which cover an area of about 1 million ha (Indonesia Forest State Enterprise, 1992). Outside Java, the natural area of teak is Muna Island, Southeast Sulawesi (Simon, 1997). In some recent years, teak has been planted in some other islands of Indonesia from Sumatra to Papua mainly by private sectors and farmers. Some of these plantations are in areas that would have been considered marginal for teak growing two decades ago.This phenomenon was encouraged by relatively new perception of teak planting as a commercially profitable venture, as well as by policy and legal changes. The rotation cycle of new high-intensity teak plantations is generally between 20 and 25 years which is three to four times shorter than for older low-intensity plantations (Nair & Souvannavong, 2000). Nowadays, the government does not control its harvesting and utilization for teak grown on private land.However, information on growth response of this kind of teak to climate is very limited. The fast growth of this kind of teak needs a specific environment that could be different for the slow growing one. Its resistance to water deficit may not be as high as the slow growing one as its needs much water to cover its fast growth particularly in the early period of growth. This experiment was intended to analyze the effects of water deficit to the growth of young fast growing teak.
VARIABILITY OF NORMALIZED DIFFERENCE VEGETATION INDICES IN SUMATRA AND ITS RELATION TO CLIMATE ANOMALIES(KERAGAMAN INDEKS VEGETASI DI SUMATERA DAN HUBUNGANNYA DENGAN ANOMALI IKLIM) Erna Sri Adiningsih; Kustiyo .
Agromet Vol. 19 No. 1 (2005): June 2005
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (949.528 KB) | DOI: 10.29244/j.agromet.19.1.21-38

Abstract

Indeks vegetasi yang diperoleh dari data NOAA-AVHRR sudah umum digunakan sebagai indikator kehijauan dan kekeringan vegetasi. Kondisi iklim global dan regional diatas Sumatera mempengaruhi indeks vegetasi di Sumatera. Penelitian ini bertujuan mempelajari keragaman indeks vegetasi terutama di Sumatra dan hubungannya dengan El Nino - Southern Oscillation (ENSO) dan Indian Ocean Dipole Mode Event (DME). LAC NDVI periode 1996-2002 digunakan untuk menganalisa koefisien keragaman dan analisis korelasi kanonik. Keragaman NDVI yang tinggi ditemukan di pantai timur, bagian selatan dan bagian utara Sumatera, sedangkan di bagian barat dan tengah keragamannya rendah. Secara keseluruhan, keragaman NDVI selama monsun barat lebih tinggi daripada periode monsun timur. ENSO dan DME mempangaruhi indeks vegetasi di Sumatera pada lag 0,4,dan 5 bulan (nyata pada taraf 5%). Kontribusi terbesar diberikan oleh variable kanonik lag 1 (R2=70.1%), sisa 29,9 % disebabkan oleh keragaman factor-faktor lainnya. Kerana korelasi dan signifikansi dari parameter iklim secara statistik tinggi, maka dapat digunakan sebagai prediktor NDVI di Sumatera. Diantara 6 time lag , parameter dengan lag 6 bulan mempunyai keragaman yang tertinggi. Namun, uji beda nyata menunjukkan bahwz korelasi kanonik pada lag 0,4,dan 5 yang mempunyai beda nyta tertinggi (pada taraf 95%). Struktur korelasi kanonik untuk parameter iklim pada lag 0 dan 1 didominasi oleh SOI dan anomaly SST. Sedangkan korelasi pada lag 2,5, dan 6 didominasi oleh SOI, anomaly SST, dan DMI. Berdasarkan hasil analisis tersebut, kami menyimpulkan bahwa analisis korelasi kanonik merupakan metode yang optimum untuk memprediksi NDVI di Sumatera pada lag 5 bulan menggunakan SOI, SSTA, dan DMI sebagai prediktor. Hasil ini menunjukkan bahwa parameter iklim dapat digunakan untuk memprediksi NDVI 5 bulan ke depan dengan baik di Sumatera.
EFISIENSI KONVERSI ENERGI SURYA PADA TANAMAN KENTANG (Solanum tuberosum L.) (RADIATION USE EFFICIENCY IN POTATO (Solanum Tuberosum L.) Agus Suryanto; Bambang Guritno; Yogi Sugito; Yonny Koesmaryono
Agromet Vol. 19 No. 1 (2005): June 2005
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (184.358 KB) | DOI: 10.29244/j.agromet.19.1.39-48

Abstract

Efisiensi penggunaan radiasi surya adalah nilai konversi radiasi surya menjadi energi kimia melalui proses fotosintesis. Nilai ini menunjukkan persentase berapa banyak energi radiasi yang diserap tanaman mampu diubah menjadi energi dalam bentuk kimia (Lawlor, 1993). Produksi berat kering berbagai tanaman rata-rata sekitar 1,4 g berat kering per MJ radiasi surya yang diserap tanaman atau dengan kata lain mempunyai nilai Efisiensi Konversi Energi (EKE 2,5) %. Pada tanaman kentang, dengan intensitas 2 GJ m-2 selama masa pertumbuhan 120 hari umumnya diperoleh nilai EKE 1,3 % (Jones, 1992)Sampai dengan tahun 2000 perkembangan luas panen tanaman kentang di Indonesia mencapai 73.068 ha, dengan total produksi 977.349 ton, atau produksi rata-rata per hektar berkisar 13,4 ton (BPS, 2000). Di Jawa Timur, Basuki et al. (1993) melaporkan, produktifitas 10 varietas kentang pada nilai ILD 1,26 – 3,93, berkisar 11 - 27 ton per hektar. Produksi ini apabila ditinjau dari sisi penangkapan energi surya, efisiensinya sangat rendah, karena menurut Haeder dan Beringer (1983), pada kisaran ILD tersebut semestinya dapat dihasilkan umbi kentang sekitar 20 – 50 ton per hektar. Kecenderungan hasil yang rendah ini disebabkan praktek budidaya tanaman yang kurang benar sehingga memberikan nilai konversi energi surya yang sangat tidak efisien, misalnya penggunaan jarak tanam yang terlalu lebar, penanaman tanaman pada saat musim hujan dimana banyak awan yang menghalangi radiasi surya, penanaman tanaman pada dataran tinggi yang cenderung berkabut, saat tanam tanpa memperhatikan fase pertumbuhan yang peka terhadap intensitas radiasi surya, dan lainnya. Untuk meningkatkan efisiensi penggunaan radiasi surya, berbagai cara dapat dilakukan. Sugito (1999) menyarankan beberapa cara perbaikan budidaya tanaman, diantaranya dengan mengurangi energi surya yang lolos pada pertanaman dan mengoptimalkan penggunaan energi surya yang jatuh pada kanopi tanaman, diantaranya dengan meningkatkan populasi tanaman. Haeder dan Beringer (1983) menambahkan peningkatan EKE dapat juga dilakukan dengan memilih kultivar yang berumur panjang dan pemilihan lokasi bersuhu 10 – 20 C dengan intensitas cahaya tinggi. Percobaan ini bertujuan untuk menganalisis peningkatkan efisiensi energi surya melalui pengaturan saat tanam, populasi tanaman serta penggunaan varietas yang potensial.
IDENTIFIKASI DAN KARAKTERISASI POTENSI AIR TANAH UNTUK PENGEMBANGAN IRIGASI SUPLEMENTER DI PABRIK GULA RENDENG DAN TRANGKIL JAWA TENGAH (IDENTIFICATION AND CHARACTERIZATION OF GROUND WATER POTENTIAL FOR DEVELOPING SUPLEMENTARY IRRIGATION IN ... P. Rejekiningrum; F. Ramadani; Y. Apriyana; . Haryono
Agromet Vol. 19 No. 1 (2005): June 2005
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (598.052 KB) | DOI: 10.29244/j.agromet.19.1.49-64

Abstract

Micro sugar industry have some potential problem that needed serious interested, issues of global climate change have affected long drought period with the result that water availability for sugarcane very limited, and problem of land resources in specific location. To anticipate water scarcity in sugarcane plantation need to be optimalization water use through identification ground water potential to know depth and distribution groundwater resources used supplementary irrigation. This paper is attempt in optimalising water resources use through mapping of ground water to know ground water potencyl for developing supplementer irrigation with pumping and deep irrigation to increase sugar cane productivity, rendemen, and production in upland sugarcane PG. Rendeng and of Trangkil. Measurement of ground water characteristic through geolistrict survey using Terameter by detecting electrics into ground by electrodes and take the resistivity value in time dimension, this equipment can identify material underground more than 200 metre depth without passing drilling. Of underground material which have known, hence can be determined resistivity and aquifer thickness. The results of this research showed that in PG. Rendeng and and Trangkil have moderate ground water potency (overburden thickness 6-15 and aquifer thickness 16-25 m) until good (overburden thickness 16-25 and aquifer thickness 26-35 m) but moderate is to be dominant. Ground water potency is distribute in the middle and east of PG. Rendeng and Trangkil.

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