Articles

Pengelompokan Genotipe Jarak Pagar Berdasarkan Ketahanannya terhadap Kekeringan pada Fase Pembibitan di Lahan Pasir Pantai Parwata, I Gusti Made Arya; Indradewa, Didik; Yudono, Prapto; Kertonegoro, Bambang Djadmo
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 38, No 2 (2010): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (249.724 KB)

Abstract

Extension of jatropha planting on coastal sandy soil is an effort to look for an alternatif area to other soil types, this experiment is one of a series experiment aiming to classify jatropha based on their drought resistance, and to determine watering interval causing drought stress. The experiment was arranged using Split Plot Design with watering interval (once in 1, 3, 5, 7, and 9 day (s)) as main plot, and jatropha genotypes (IP-1A, IP-1M, IP-1P, IP-2A, IP-2M, IP-2P, Unggul Lokal (NTB), Gundul and Daun Kuning) as sub plot. The seeds of genotypes were planted in black polybag with coastal sandy soil media. The parameters observed were plant height, stem diameter, number of leaf, leaf width and plant dry weight, and the data collected were analyzed using Analysis of Variance, DMRT, Regrression and Cluster Analysis. The result showed that IP-1A, IP-2M, Gundul and IP-1M are the resistant genotypes, whereas Unggul Lokal, Daun Kuning, IP-2A and IP-2P are the susceptible genotypes. Once in one and three day (s) are optimum watering intervals, and once in nine days is a watering interval causing drought stress. Keywords : jatropha, drought, watering, coastal sandy soil
Identifikasi Sifat Fisik Lahan Gambut Rasau Jaya III Kabupaten Kubu Raya untuk Pengembangan Jagung Suswati, Denah; Hendro, Bambang; Shiddieq, Dja’far; Indradewa, Didik
Jurnal Perkebunan dan Lahan Tropika Vol 1, No 2 (2011): PERKEBUNAN DAN LAHAN TROPIKA
Publisher : Jurnal Perkebunan dan Lahan Tropika

Show Abstract | Original Source | Check in Google Scholar | Full PDF (145.9 KB)

Abstract

This research was aimed to identify the physical properties of land which includes the level of maturity and the thickness of peat, soil color, texture, structure, consistency, drainage, groundwater depth, soil effective depth, the depth  of sulfidik, and the maturity of soil (n-value) as well as recommending the management of soil to support the development  maize on peat land. The research was carried out in the Rasau  Jaya III area Kubu Raya Regency, with an area of 2,490 Ha. The Soil physical analysis done in the laboratory of Soil Physics and Conservation the Faculty of Agriculture Tanjungpura University.
Analysis of The Growth of Oil Palm (Elaeis guineensis Jacq.) Exposed by Aluminum Toxicity and Silica as an Amelioration Ratnasari, Satiti; Putra, Eka Tarwaca Susila; Indradewa, Didik
Jurnal Ilmu Pertanian Vol 2, No 1 (2017): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1586.381 KB)

Abstract

Aluminum (Al) contained in acidic soil could become an obstacle for plant growth. The Al toxicity could inhibit root growth, water and nutrient absorption. One of the solution to overcome Al toxicity was by applying Silica (Si). The aim of this research was to study the impacts of Al to the growth activity of oil palm and to know the effects of Si to the growth activity of oil palm contaminated by Al. The factorial treatments were arranged in a complete random design with two factors. The first factor was Al toxicity, i.e. with and without Al, while the second factor was the application of Si that consisted of four levels (0, 32, 64, 96 gram per plant). some of variables included leaf area ratio (LAR), leaf area, net assimilation rate (NAR), relative growth ratio (RGR), plant height, and plant dry weight were observed. The result showed that Al toxicity decreased the LAR, leaf area, NAR, RGR, plant height, and plant dry weight. The application of Si 32 gram per plant increased leaf area ratio and was not significantly different from the application of 96 gram Si per plant. However, the application of Si to oil palm contaminated with Al did not affect to relative grow rate, but its application to normal plant would increase the relative growth ratio.
Effect of The Substitution of Compound Fertilizer With Single Fertilizer and Mycorrhizal Inoculation on The Growth and Yield of Soybean Among Eucalyptus Sinaga, Apresus; Indradewa, Didik; Suryanto, Priyono
Jurnal Ilmu Pertanian Vol 1, No 2 (2016): August
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1192.127 KB)

Abstract

The efforts to improve the productivity of soybean can be done through technological innovation by the provision of chemical fertilizers and mycorrhizae. This study were aimed to obtain information on the effect of a single fertilizer, which can provide the same or higher level of soybean crops if compared with those compound fertilizers, as well as to find out the effect of mycorrhizae to the improvement of efficiency in the use of inorganic fertilizers. It is expected that the mycorrhizae inoculation can reduce single fertilizer’s dose to the level equivalent to the compound fertilizer given by farmers. The study was conducted in Bleberan Village, Playen Subdistrict, Gunung Kidul Regency, Yogyakarta from February to May 2015. It was conducted by using a two-factors factorial design arranged in a randomized block design with three replications. The first factor was inorganic fertilizer (N, P2O5 and K2O), consisting of 5 levels, i.e. without fertilizer (0-0-0 kg/ ha), Phonska fertilizer (45-45-45 kg/ha), single fertilizer (45 -45-45 kg/ha), a low single fertilizer (23-36-30 kg/ha) and high single fertilizer (23-108-90 kg/ha). The second factor was mycorrhizal inoculation, consisting of three levels, i.e. without mycorrhizae (0 g), medium dose (2.5 g) and high dose (5 g). Data were analyzed using Analysis of Variance (ANOVA) at a significance level of 5%. If there was a significant difference, analysis was followed by Duncan Multiple Range Test with a significance level of 5%. The relationship between variables observed was examined by a correlation analysis. The results showed that there was no interaction between inorganic fertilizer and mycorrhizal application. The dose of single fertilizer which was equivalent to the dose of compound fertilizer given to soybean could increase crops by 1.37 t/ha compared with plants treated with a compound fertilizer 1.13 t/ha. The results of correlation analysis among parameters showed that there were correlations between the grain crops and height (r = 0.506**), stem diameter (r = 0.303*), and the number of pods per plant (r = 0.313*).
Lebar Bedengan untuk Genangan dalam Parit pada Tanaman Kedelai Indradewa, Didik; Sastrowinoto, Soemartono; Notohadisuwarno, Supriyanto
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 30, No 3 (2002): Buletin Agronomi
Publisher : Bogor Agricultural University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (711.384 KB)

Abstract

saturated soil culture the width of the beds were recommended between I m and 2 m, which require more labor to dig the furrows. An experiment was done to study the effect of the width of beds and to determine the optimal bed´s width. The experiment was done on Regosol soil in Sleman Regency, Yogyakarta using Randomized Complete Blocked Design with three blocks. The treatments were flood irrigation as control and saturated soil culture with I, 2, 3 and 4 m . wide of beds. Observations were done on soil moisture, physiological processes, growth and yield of soybean. The result of the experiment showed that saturated soil culture stabilized the soil moisture around field capacity, increased physiological processes, growth of the plant and increased the seed yield 81 %from 1.17 t ha-1 up to 2.12 t ha-l. There was no significant different on the effect of width of the beds, therefore 3-4 m bed´s width was recommended. Keywords: Saturated soil culture, Soybean, Bed´s width.
Respon Pertumbuhan dan Hasil Tanaman Jarak Pagar (Jatropha curcas L.) terhadap Cekaman Kekeringan di Lahan Pasir Pantai pada Tahun Pertama Siklus Produksi Parwata, I Gusti Made Arya; Indradewa, Didik; Yudono, Prapto; Kertonegoro, Bambang Djadmo; Kusmarwiyah, Rukmini
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 42, No 1 (2014): JURNAL AGRONOMI INDONESIA
Publisher : Bogor Agricultural University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (222.408 KB)

Abstract

ABSTRACTDevelopment of Jatropha, an important tropical biofuel crop, to coastal sandy soil is an urgent situation due to more limited of fossil fuel in one side, and high potency of coastal sandy land that has not been utilized yet. Tolerant and sensitive genotypes of Jatropha were treated with drought stress using watering interval, and their responds on the vegetative growth and yield were studied in this reasearch. Drought stress significantly decreased all vegetative growth parameters observed, except the number of branch. Different jatropha genotypes had different number of branch, number of leaf, root surface area, total of root length, root diameter, plant dry weight, shoot root ratio and light absorption. IP-1A genotype had the highest yield, i.e 33.54 g of dry seed plant-1 (equal to 0.15 ton ha-1), in the first year.Keywords: biofuel, sand, watering
Tanggapan Tanaman Kedelai terhadap Inokulasi Rhizobium PURWANINGSIH, OKTI; INDRADEWA, DIDIK; KABIRUN, SITI; SHIDDIQ, DJAFFAR
Agrotrop: Journal on Agriculture Science Vol 2, No 1 (2012)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Original Source | Check in Google Scholar

Abstract

Nitrogen is one important element in plant growth. In soybean crop nitrogen requirement can bemet from the fixation of nitrogen which is the result of symbiosis between rhizobium bacteria withsoybean. A study on the relationship between soybean cultivar and rhizobium inoculation was conductedin Banguntapan Bantul Yogyakarta on regusol soils. Research aimed the responses of soybean cultivarof rhizobium inoculation. This research is a pot experiment that tested the response of 16 soybeancultivars of rhizobium inoculation. The sixteen cultivars consisted of 12 superior cultivars and 4 localcultivars. Before planting soybean seeds were inoculated with legin. Land used first sterilized usingautoclaves. Determination of soybean cultivars into four categories based on agronomic charactersnodule number, nodule dry weight, canopy N content, nitrogenase activity and grain yield components(seed dry weight). The study demonstrated that (1) Cultivars Anjasmara, Sibayak, Surya, Gepak yellow,Galunggung, Argomulyo and Baluran provide a response to rhizobium inoculation in the form of increasednitrogen fixation and grain yield (2) rhizobium inoculation on Tanggamus cultivars can increase nitrogenfixation but not followed by an increase in grain yield (3) rhizobium inoculation in cultivar Malabar,Seulawah and Petek not increase nitrogen fixation but can increase grain yield (4) rhizobium inoculationin cultivar Ijen, Sinabung, Wilis, Grobogan, and Garut not increase nitrogen fixation and grain yield.
ISOLASI DAN SELEKSI PSEUDOMONAD FLUORESCENS PADA RISOSFER PENYAMBUNGAN TOMAT Nurcahyanti, Suhartiningsih Dwi; Arwiyanto, Triwidodo; Indradewa, Didik; Widada, Jaka
Berkala Ilmiah Pertanian Vol 1, No 1: AGUSTUS 2013
Publisher : Berkala Ilmiah Pertanian

Show Abstract | Original Source | Check in Google Scholar | Full PDF (184.592 KB)

Abstract

[ENGLISH] Fluorescen pseudomonad had been isolated from the rhizosphere of grafting tomato with resisten rootstock (H 7996 and EG 203 from Asian Vegetable Research Development Center). Tomato varieties Permata and Fortuna were used as scion in grafting. Fluorescen pseudomonad was isolated on King’S B medium and used phosphate buffer 0,1 M + 0,1 % pepton. About 230 isolates of P. fluorescens were isolated from tomato rhizosphere at 14 HST and about 454 isolates at 28 HST. All isolates were tested for their capability to suppress the growth Ralstonia solanacearum in vitro. All isolates inhibited the growth of R. solanacearum with an inhibition zone of 1 mm to 7 mm or more. The mechanism growth of inhibition was bacteriostatic. About Ten isolates of P. fluorescens which had large inhibition zone, were not inhibit each other and inhibition against R. solanacearum due to nutrient competition. Keywords : tomato; grafting; Fluorescens pseudomonad [INDONESIAN] Pseudomonad fluorescens diisolasi dari risosfer tomat hasil penyambungan dengan batang bawah tahan yaitu tomat H 7996 dan terung EG 203 dari Asian vegetebles Research Development Center (Taiwan). Sebagai batang atas digunakan varietas Permata dan Fortuna. Isolasi dilakukan pada media King’s B dan menggunakan buffer phospat 0,1 M + pepton 0,1 %. Sejumlah 230 isolat P. fluorescens berhasil diisolasi dari risosfer pada 14 HST dan 454 isolat pada 28 HST. Semua isolat diuji kemampuannya dalam menghambat pertumbuhan Ralstonia solanacearum secara in vitro. Semua isolat P. fluorescens mampu menghambat R. solanacearum dengan zona hambatan antara 1 mm sampai dengan lebih dari 7 mm. Semua isolat mempunyai mekanisme penghambatan bakteriostatik. Sebanyak sepuluh isolat P. fluorescens yang mempunyai daya hambat besar, tidak saling menghambat satu dengan yang lain dan penghambatan terhadap R solanacearum yang terjadi karena adanya kompetisi nutrisi. Kata kunci: Tomat; Penyambungan; Pseudomonad fluorescens  How to citate: Nurcahyanti SD, T Arwiyanto, D Indradewa, J Widada. 2013. Isolasi dan seleksi pseudomonad fluorescens pada risosfer penyambungan tomat. Berkala Ilmiah Pertanian 1(1): 15-18
PENGARUH KUALITAS BAHAN ORGANIK DAN KESUBURAN TANAH TERHADAP MINERALISASI NITROGEN DAN SERAPAN N OLEH TANAMAN UBIKAYU DI ULTISOL Wijanarko, Andy; Purwanto, Benito Heru; Shiddieq, Dja’far; Indradewa, Didik
Jurnal Perkebunan dan Lahan Tropika Vol 2, No 2 (2012): PERKEBUNAN DAN LAHAN TROPIKA
Publisher : Jurnal Perkebunan dan Lahan Tropika

Show Abstract | Original Source | Check in Google Scholar | Full PDF (197.199 KB)

Abstract

Bahan organik tanah sangat berpengaruh terhadap kesuburan tanah dan produksi biomassa tanaman.  Kualitas bahan organik merupakan salah satu kunci dalam menjaga kelestarian tanah, tanaman dan lingkungan.  Penelitian ini bertujuan untuk mempelajari pengaruh kualitas bahan organik dan kesuburan tanah terhadap mineralisasi N. Untuk mengestimasi parameter mineralisasi N (potensial mineralisasi N (N0), laju mineralisasi (k), energi aktivasi (Ea) dan N0k) dilakukan percobaan inkubasi di laboratorium, menggunakan persamaan first order.  Sedangkan hubungan antara parameter mineralisasi dengan serapan hara N, dilakukan dengan melakukan percobaan pot di rumah kaca. Nilai N0, k dan Ea berturut-turut adalah 400 – 1156 mg kg-1, 0,0056 – 0,098 per minggu dan 10166 – 31478 J mol-1. Parameter mineralisasi N berkorelasi positif dengan N larut air, N-POM, Mikrobiomassa N, C-POM, Mikrobiomassa C, N-total dan nisbah C/N serta berkorelasi positif dengan berat kering tanaman, konsentrasi N dan serapan N tanaman ubikayu.  Bahan organik yang mempunyai nisbah C:N rendah dan tanah yang mempunyai tingkat kesuburan yang lebih tinggi mempunyai mineralisasi N yang lebih tinggi, yang ditunjukkan dengan nilai N0, k dan N0.k yang lebih tinggi dibandingkan dengan bahan organik dengan nisbah C:N tinggi dan kesuburan tanah yang rendah.   Kata kunci :  kualitas bahan organik, kesuburan tanah, mineralisasi N, serapan N
Pengelompokan Genotipe Jarak Pagar Berdasarkan Ketahanannya terhadap Kekeringan pada Fase Pembibitan di Lahan Pasir Pantai Parwata, I Gusti Made Arya; Indradewa, Didik; Yudono, Prapto; Kertonegoro, Bambang Djadmo
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 38, No 2 (2010): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy

Show Abstract | Original Source | Check in Google Scholar

Abstract

Extension of jatropha planting on coastal sandy soil is an effort to look for an alternatif area to other soil types, this experiment is one of a series experiment aiming to classify jatropha based on their drought resistance, and to determine watering interval causing drought stress. The experiment was arranged using Split Plot Design with watering interval (once in 1, 3, 5, 7, and 9 day (s)) as main plot, and jatropha genotypes (IP-1A, IP-1M, IP-1P, IP-2A, IP-2M, IP-2P, Unggul Lokal (NTB), Gundul and Daun Kuning) as sub plot. The seeds of genotypes were planted in black polybag with coastal sandy soil media. The parameters observed were plant height, stem diameter, number of leaf, leaf width and plant dry weight, and the data collected were analyzed using Analysis of Variance, DMRT, Regrression and Cluster Analysis. The result showed that IP-1A, IP-2M, Gundul and IP-1M are the resistant genotypes, whereas Unggul Lokal, Daun Kuning, IP-2A and IP-2P are the susceptible genotypes. Once in one and three day (s) are optimum watering intervals, and once in nine days is a watering interval causing drought stress. Keywords : jatropha, drought, watering, coastal sandy soil
Co-Authors Abdul Syukur Achmad Fatchul Aziez Aditya Herwin Dwiputra, Aditya Herwin Afiat, Reni Aliyaman, Aliyaman Aliyaman, Aliyaman Amalia T Sakya Amarullah, Amarullah Amarullah, Amarullah Andy Wijanarko Aryo Wijayanto, Aryo Azwar Maas Bambang Djadmo Kertonegoro Bambang Hendro Bambang Hendro sunarminto Bambang Hendro Sunarminto Benito Heru Purwanto Bostang Radjagukguk Christanti Sumardiyono Darjanto, Darjanto Denah Suswati Dja’far Shiddieq Dja’far Shiddieq DJAFFAR SHIDDIQ Djoko Prajitno Dody Kastono Edhi Martono Eka Listia Eka Tarwaca Susila Putra, Eka Tarwaca Susila Eka Tawarca Susila Putra, Eka Tawarca Susila Eko Hanudin Eko Haryono Endang Sulistyaningsih Erlina Ambarwati, Erlina Ernitha Panjaitan Eskundari, Ratna Dewi Hapsari, Risda I Gusti Made Arya Parwata ika irmayanti, ika Ikhsanti, Afiffah JAKA WIDADA Junun Sartohadi Kasumbogo Untung, Kasumbogo Kurniasih, Budiastuti Kurniasih, Budiastuti Kurniasih, Budiastuti Lana Khimayatur Rohmaniyah, Lana Khimayatur Melulosa Andhytya Sakti Muhammad Syihabul Fikri, Muhammad Syihabul Nurhanafi, Amal Wira Nursamsi Pusposendjojo, Nursamsi Nuzul, Vicky Silvia OKTI PURWANINGSIH Prakoso, Dhimas Ikhsan Prapto Yudono Pratama, Ananta Bayu Priyono Suryanto Purwanto, Benito Heri Puspitasari, Sylvatera Ayu Putu Sudira Ratnasari, Satiti Ratnasari, Satiti Rohlan Rogomulyo, Rohlan Rosi Widarawati Rudianto, Ganang Rukmini Kusmarwiyah Sinaga, Apresus Sinaga, Apresus SITI KABIRUN Soemartono Sastrowinoto Sri Nuryani Hidayah Utami Sri Suryanti Suhartiningsih Dwi Nurcahyanti Supriyanto Notohadisuwarno Supriyono Supriyono Suryaningndari, Damar Suryaningndari, Damar Susila Putra, Eka Tarwaca Syamsuddin Syamsuddin Taryono Taryono Tirta, Fahmi Anugrah Tohari Tohari Triwidodo ARWIYANTO Tunjung Pamekas, Tunjung Uzhar Khairullah Wahono Wahono Winarni, Marti Witjaksono Witjaksono Wulandari, Okti Y. Andi Trisyono Yekti Asih Purwestri, Yekti Asih Yuni Ratna Zakariyya, Fakhrusy Zakariyya, Fakhrusy