Articles

Respon Agronomi Varietas Padi terhadap Periode Kekeringan pada Sistem Sawah Tubur, Herman Wafom; Chozin, Muhamad Achmad; Santosa, Edi; Junaedi, Ahmad
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 40, No 3 (2012): JURNAL AGONOMI INDONESIA
Publisher : Bogor Agricultural University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (308.786 KB)

Abstract

The objective of this experiment was to identify the growth and production of rice varieties as responses to drought period in low land rice system. Rice plants were grown under plastic house in plots separated by massive walls. Drought periods were treated as main plots, i.e. water was supplied during 3, 6, and 9 weeks after rice transplanting, and control (cultivation without drought treatment). Rice varieties were used as sub plots, consisted of IR64 and Ciherang (low land improved varieties), IPB-3S (new plant type), Menthik Wangi (an aromatic local low land rice), Rokan (a hybrid rice), Way Apo Buru (amphibian type), Jatiluhur and Silugonggo (up land type). Our results showed that drought periods suppressed plant height, tiller number, spikelets length, weight of 1,000 grains, shoot dry weight and harvest index, and increased number of empty spikelets. Interaction between drought periods and rice varieties significantly affected productive tiller number, percentage of plants to flower, and grain weight per hill. Jatiluhur, Ciherang and Way Apo Buru still gave relatively high yields under drought stress indicated that those varieties were relatively tolerant to drought stress; Silugonggo and IPB-3S had medium tolerance to drought stress; IR64, Menthik Wangi and Rokan were the most sensitive varieties. Keywords: drought stress, drought tolerant, improved variety, local variety
Karakteristik Daun Jarak Pagar (Jatropha curcas L.) dan Hubungannya dengan Fotosintesis Raden, Ince; Purwoko, Bambang S.; Hariyadi, ,; Ghulamahdi, Munif; Santosa, Edi
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 36, No 2 (2008): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (27.11 KB)

Abstract

The objective of this research was to study the morphology and physiology of jatropha leaves and its relation to photosynthesis. Research was conducted using Randomized Complete Block Design with single factor,  i.e., leaf ages at the canopy with ten replications. The results showed that jatropha had phyllotaxy 5/13 with  angular divergence 1380. In early growing leaf enlarged sharply and then constant after 9 week, remaining green for 14 weeks.  Chlorophyll a, b, and total achieved maximum at 9 week, i.e., 0.45 g/cm2, 0.19 g/cm2, and 0.62 g/cm2, respectively. Photosynthesic rate was maximum at 6 week, i.e., 8.99 µmol/m2/s, while number of  stomata was maximum at 9 week (289.47 mm2). This finding implies that leaf number 11 to 13 or age 6 week after emergence could be used as reference for photosynthetic evaluation.   Key words:  Jatropha curcas L., leaf arrangement, photosynthetic, reference leaf
Pengaruh Alelopati Jarak Pagar (Jatropha curcas L.) terhadap Perkecambahan Benih Jagung, Tomat dan Padi Gogo Raden, Ince; Purwoko, Bambang S.; Santosa, Edi; Hariyadi, ,; Ghulamahdi, Munif
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 36, No 1 (2008): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (51.651 KB)

Abstract

  The objective of this research was to evaluate the effect of extract of leaves, seed and root of physic nut on the germination of corn, tomato, and upland rice. Research was conducted by using Complete Randomized Block Design with two factors, i.e., plant organ (leaves, seed and root) and species (corn, tomato and upland rice). The results showed that extract of 36 g dried organ/200 ml water (0.18 g/ml water) affected seed germination of corn, tomato, and upland rice. Extract of leaves tended to reduce percentage of corn seed germination (55.30% vs 70.68%), and extract of root to reduce germination of tomato and upland rice, 52.70% and 68.67%, compared to control 76% and 84%, respectively.   Key words:  Plant organ extract, physic nut, germination  
Nitrogen and Potassium Applications on the Growth of Amorphophallus muelleri Blume Santosa, Edi; Setiasih, Ika; Mine, Yoko; Sugiyama, Nobuo
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 39, No 2 (2011): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (27.11 KB)

Abstract

Productivity of Amorphophallus muelleri is considered low. Thus, pot experiment was conducted at the Cikabayan Experimental Farm, Bogor Indonesia during rainy season November 2007 to July 2008, in order to determine the optimum fertilizer dose for A. muelleri under 50% shading net. Treatments consisted of four doses of nitrogen (0, 50, 100 and 150 kg ha-1 N) and three doses of potassium (0, 50 and 100 kg ha-1 K2O). The results showed that application of N and K fertilizers significantly increased vegetative growth, i.e., number of leaves, number of leaflets and second leaf size, but did not affect harvesting time. Fresh weight and dry matter content of daughter corm were significantly affected by N and K applications. Combination of 50 kg ha-1 N and 100 kg ha-1 K2O resulted in higher corm weight than other treatments. It is evident that the application of nitrogen and potassium is important in A. muelleri.   Keywords: disease infection, iles-iles, Indonesian konjac, nitrogen, potassium
Effects of Pot Sizes and the Number of Plants per Pot on the Growth of Amorphophallus muelleri Blume Mine, Yoko; Santosa, Edi; Amaki, Wakanori; Sugiyama, Nobuo
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 38, No 3 (2010): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (27.11 KB)

Abstract

 To determine the effects of pot sizes and the number of plants per pot on the growth of Amorphophallus muelleri, seed corms weighing 100-125 g were planted in polyethylene pots.  In the first experiment, a corm was planted in pots containing various amounts of growth media: i.e., 0.25, 0.40, 0.50, 1.00, 1.33, 2.00 and 4.00 kg.  In the second experiment, different numbers of plants, i.e., 1, 2, 3, 4 and 5, were grown in pots containing 4.00 kg of growth media.  When plants were grown in pots containing a small amount of media (1.33 kg pot–1 or less), they produced small daughter corms and entered dormancy earlier than usual.  The number of plants per pot had little effect on corm weight if the amount of growth media per plant was 0.80 kg or greater.  As a result, corm yield increased with an increase in the number of plants per pot.  The period from corm planting to harvest was slightly longer when only 1 plant was grown in a pot than when 2–5 plants were grown in the same-sized pot.  This study suggested that the low productivity of A. muelleri in shallow soil was associated not only with a small amount of soil per plant but also with limited rooting volume.   Keywords: available water, competition, dormancy, plant density, soil depth
Keragaan Varietas dan Galur Padi Tipe Baru Indonesia dalam Sistem Ratun Susilawati, ,; Purwoko, Bambang S.; l Aswidinnoor, Hajria; Santosa, Edi
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 38, No 3 (2010): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (27.11 KB)

Abstract

Eighteen Indonesian new plant type (NPT) of rice varieties and lines were evaluated in a ratoon system. The results showed that ratooning ability was related to the vegetative growth prior to harvest, which gave high ability ratoon growth.  New plant type varieties and several lines of rice had better vegetative growth and produced higher ratoon than other genotypes.  Ratoons started to develop 2-7 days after harvest, with  an average number of leaf 2-4 per tiller.  Number of productive tillers of ratoon ranged from 6.0 to 30.0 per hill, with  number of grain per panicle ranged from 38.0 to 228.2, and grain weight per hill of ratoon 10.4 to 31.2 g, dependent on genotypes. Maturity of ratoon was also dependent on genotypes.  On average, maturity was 68 days after harvest of the main crop.  Grouping of ratooning ability based on hierarchical cluster analysis resulted in three groups, namely nine genotypes had high potential, five genotypes had medium potential, and four genotypes had low potential.  This study indicated that ratoon is potential to increase rice planting index in Indonesia.   The genotypes with high ratoon ability need to be evaluated for agronomic performance in the field.   Keywords:  new plant type, rice, ratooning  ability
Respon Agronomi Varietas Padi terhadap Periode Kekeringan pada Sistem Sawah Tubur, Herman Wafom; Chozin, Muhamad Achmad; Santosa, Edi; Junaedi, Ahmad
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 40, No 3 (2012): JURNAL AGONOMI INDONESIA
Publisher : Bogor Agricultural University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (27.11 KB)

Abstract

The objective of this experiment was to identify the growth and production of rice varieties as responses to drought period in low land rice system. Rice plants were grown under plastic house in plots separated by massive walls. Drought periods were treated as main plots, i.e. water was supplied during 3, 6, and 9 weeks after rice transplanting, and control (cultivation without drought treatment). Rice varieties were used as sub plots, consisted of IR64 and Ciherang (low land improved varieties), IPB-3S (new plant type), Menthik Wangi (an aromatic local low land rice), Rokan (a hybrid rice), Way Apo Buru (amphibian type), Jatiluhur and Silugonggo (up land type). Our results showed that drought periods suppressed plant height, tiller number, spikelets length, weight of 1,000 grains, shoot dry weight and harvest index, and increased number of empty spikelets. Interaction between drought periods and rice varieties significantly affected productive tiller number, percentage of plants to flower, and grain weight per hill. Jatiluhur, Ciherang and Way Apo Buru still gave relatively high yields under drought stress indicated that those varieties were relatively tolerant to drought stress; Silugonggo and IPB-3S had medium tolerance to drought stress; IR64, Menthik Wangi and Rokan were the most sensitive varieties. Keywords: drought stress, drought tolerant, improved variety, local variety
Peran Hara N, P dan K pada Pertumbuhan dan Perkembangan Ratun Lima Genotipe Padi Susilawati, ,; Purwoko, Bambang Sapta; Aswidinnoor, Hajrial; Santosa, Edi
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 40, No 3 (2012): JURNAL AGONOMI INDONESIA
Publisher : Bogor Agricultural University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (278.739 KB)

Abstract

The objective of the research was to determine the roles of fertilizers application in improving rice ratoons. Statistical design used was a factorial randomized complete block design with three replications. The first factor was three levels of fertilizer rate (kg ha-1) i.e. 5 N + 27 P2O5; 45 N + 30 K2O; and 27 P2O5+30 K2O. The second factor was rice genotypes, i.e. Cimelati, Hipa-5 and Rokan varieties, and two lines of rice i.e. IPB106-7-47-DJ-1 and IPB106-F-8-1. The growth and production characters of main crops and ratoon were observed. The results showed that both genotypes and rates of fertilizer affected yield of ratoon. Following application of (kg ha-1) 45 N + 27 P2O5 three genotypes produced the highest ratoon, i.e. IPB106-7-47-DJ-1 and IPB106-F-8-1 lines and Rokan variety. Cimelati and Hipa-5 varieties produced higher number of ratoon with fertilizer rate (kg ha-1) 45 N + 30 K2O. Ratoon production of all genotypes ranged 38.1-56.6% of the main crop. This study clearly demonstrated that N, P and K fertilizer had important roles in increasing yield and yield components of rice ratoon. Keywords: fertilizer, productivity, rice genotypes, rice ratoon
Peramalan Produksi Kelapa Sawit menggunakan Peubah Agroekologi di Kalimantan Selatan Santosa, Edi; Sulistyo, Hari; Dharmawan, Iwan
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 39, No 3 (2011): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (27.11 KB)

Abstract

Estimation on oil palm production is important for company planning. However, there are only few studies have been conducted in Kalimantan. The objective of the study was to identify agronomic and agroecological factors determined production of oil palm in Kalimantan. The study was conducted at PT Ladangrumpun Suburabadi, Minamas Plantation Angsana Estate, Tanah Bumbu District, South Kalimantan, Indonesia from February 15 to June 15, 2010. Data were collected from the company, government institutions and interviews with the company staffs. Results showed that seven parameters significantly determined estimation of oil palm production. Out of 18 possible linier models, 6 models showed good fit as predictor. The best modeling as predictor was determined by current plant age (in months), fertilizer application at 18 months before harvest (MBH), relative air humidity at 6 MBH (%), light intensity at 18 MBH (%), rainfall at 6 MBH (mm), level of water deficit at 24 MBH (mm) and number rainy day at 18 MBH (days). It was expressed in equation Y = 3.15 + 0.010 age -0.016 fertilizer -0.016 light intensity -0.005 water deficit -0.015 number of rainy day. This finding implies that recording data of agronomic and ecological factors are important for production estimation. Eventhough the model is best fit to the study site, however, it needs further verification when applied in larger area of the other sites in Kalimantan.   Keywords: agronomic factors, Elaeis guineensis, linier regression, modeling, production estimation  
Genetic variations of Amorphophallus variabilisBlume (Araceae) in Java using AFLP Santosa, Edi; Sugiyama, Nobuo; Kawabata, Saneyuki; Hikosaka, Shoko
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 40, No 1 (2012): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (27.11 KB)

Abstract

Amorphophallus variabilisBlume, a member of Araceae, is a native tuber crop in Java, Madura and Kangean Islands, Indonesia. The plant showed high variations in morphology. However, genetic variations at molecular level have not been well studied. Amplified fragment length polymorphism (AFLP) was carried out using 8 primers combination of EcoRI and MseI on 78 accessions collected from 28 sites in Java, Indonesia. Results showed that AFLP markers able to generate polymorphism among accessions. A total of 220 polymorphisms were found. The differences among accessions at the genetic level were high, and 5 clusters were constructed. Grouping was independent of geographical origin, similar to clustering of morphological characteristic of flowers as in the previous report. Accessions from one site composed of one to four different cluster groups, showed that variation in single site was observed. Regarding conservation program of the A. variabilisin natural population, it is reasonable to protect one bigger site rather than many small sites, but it should be recommended to maintain conservation areas in several districts. Further study on population structure should be carried out to explain such variability. Keywords: genetic diversity, iles-iles, molecular marker, morphology, tuber crop
Co-Authors , Hariyadi , Kholidi, , , Sobir , Susilawati ,, Dulbari Abdul Harris Burhan Ade Wachjar Adolf P. Lonto Adolf Pieter Lontoh, Adolf Pieter Agusta, and Herdhata AHMAD JUNAEDI Akmal, Ajmir Alqoumi Anshar A Anas D. Susila Anas Dinurrohman Susila ANDRIA AGUSTA Ani Kurniawati Arisa Noguchi, Arisa Arjuna, Rizka Tri Arjuna, Rizka Tri Bambang S. Purwoko Bambang Sapta Purwoko Chairunnisak, Chairunnisak D Ghulam Manar Darda Efendi Desta Wirnas Dulbari, . Dulbari, Dulbari Dwi Guntoro Eko Sulistyono Elly Kristiati Agustin, Elly Kristiati fatnan fathorikh, fatnan Fifin Nashirotun Nisya Galih Marendra Gani Tarigan, Abdul Gani GHULAM DZUNUWANUS, GHULAM Gunar Widiyanto, Gunar Hadi Purnomo Hajria l Aswidinnoor HAJRIAL ASWIDINNOOR Hari Sulistyo Herdhata Agusta Herman Wafom Tubur Hermini Susiatiningsih Ika Setiasih Ince Raden Intan Dewi Puspitasari Irfanda, Munandar Irfanda, Munandar Iswandi Anas Iwan Dharmawan Kazi Liaquat Hossain Ken Takahata, Ken Kholidi . Lusia Astrika M. A. Chozin M. Rahmad Suhartanto Marchella Putriantari, Marchella Maryati Sari Md. Abdul Wadud Md. Abul Kashem Md. Shajahan Ali Memen Surahman Mohammad Abdul Wadud Muhamad Achmad Chozin Muhammad Achmad Chozin Muhammad Naufal Irfan, Muhammad Naufal Muhammad Thamrin MUNIF GHULAMAHDI Naila Izzah Nakano, Hajime Nobuo Sugiyama Nunik Retno H NURUL HIDAYAH Prawati, Utami Pubita Sasti Fintani Puji Astuti Purwanto, Imdad Julian Purwanto, Imdad Julian Putriantari, Marcella Rahmat Budiarto Rd. Selvy Handayani Reylea Adrianda Kusuma, Reylea Adrianda ristiana ., ristiana ROEDHY POERWANTO Rosdiana, Siska Rosdiana, Siska Saneyuki Kawabata Sari, and Maryati Sari, Maryarti Septiana Cahyaningtyas Shoko Hikosaka Sigit Pramono Siti Halimah Slamet Susanto SOEKISMAN TJITROSEMITO Sofyan Zaman Soni Hazam Ardiansyah Stefano, Indra Mario SUBOWO GITOSUWONDO Sugiyanta Sugiyanta Sulistyono, dan Eko Sulistyowati . Tantra, Aditya Wira Tantra, Aditya Wira Teguh Yuwono Tri Cahyo Utomo Tubur, Herman W. Wakanori Amaki Winarso D. Widodo Wiwik Widayati Yoko Mine Yonny Koesmaryono Yulianti, Nani Yunus, Ismadi