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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Buletin Agrohorti Jurnal Keteknikan Pertanian Pelita Perkebunan Jurnal Penelitian Karet Journal of Regional and Rural Development Planning Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Journal of Tropical Crop Science Buletin Palma Biodiversitas Journal of Biological Diversity

Supijatno

Department Of Agronomy And Horticulture, Faculty Of Agriculture, IPB University, Jl Meranti Kampus IPB Darmaga, Bogor, West Java 16680, INDONESIA

Author-ID : 393506

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Engineering Environmental Science Social Sciences

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Effect of watering on incidence of self-pruning in lime (Citrus × aurantiifolia (Christm.) Swingle) Elda Kristiani Paisey; Edi Santosa; Ani Kurniawati; Supijatno Supijatno; Marlin Sefrila; Besse Amriati; Anjeli Sulistianti Paisey; Hayu Siwi Pribadi; Darius Dare; Nurlailah Nurlailah; Zarima Wibawati
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 54 No. 1 (2026): Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
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 | DOI: 10.24831/jai.v54i1.68942

The process of self-pruning represents a form of self-destruction among shaded or diseased branches, which has the potential to deplete the resources of the tree. This phenomenon is also observed in natural ecosystems. The self-pruning mechanism can be exploited to reduce the cost of pruning in cultivated plants, such as lime trees. The objective of this study was to ascertain the mechanisms that occur during self-pruning in response to drought and flooding induction. The experiment was arranged in a randomized complete block design (RCBD) with three replications. Each replication contained three plants, giving a total of 45 plants. Samples were taken from three plants per treatment. The treatments comprised irrigation at field capacity, irrigation every day, irrigation every three days, irrigation every five days, and irrigation every seven days, and the data were analyzed using the Duncan Multiple Range Test at the 95% level. The secondary, tertiary, and quaternary branches that experienced self-pruning due to drought and flooding treatments had average lengths ranging from 3.06 to 9.53 cm and diameters between 0.50 and 1.84 mm. The physiological responses, including the photosynthetic rate, showed that both drought and inundation treatments led to a decrease in stomatal conductance and transpiration. Furthermore, the concentrations of ethylene, abscisic acid, and proline increased markedly after seven months of treatment-induced self-pruning. Keywords: abscisic acid; ethylene; proline

The Identification of Potential Stress in Oil Palm Using Sentinel-2A Satellite Imagery Approach and Laboratory Tests Bagus Arfanda; Sudradjat Sudradjat; Supijatno Supijatno; Harry Imantho
Journal of Tropical Crop Science Vol. 13 No. 02 (2026): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.13.02.430-444

Oil palm (Elaeis guineensis Jacq.) is a valuable source of vegetable oil for various industries, such as food and cosmetics. Global climate change, driven by global warming, has the potential to shift climate conditions and trigger extreme events, such as prolonged droughts. Extreme climate phenomena will impact plant conditions, causing plants to become stressed. A study was conducted from June 3 to October 31, 2023, at the Oil Palm Education and Research Plantation of IPB University in Jonggol, Bogor, West Java. The study aimed to determine the Palm Oil Stress Index (POSI) to identify stress in oil palm plants. The identification process included analyzing Sentinel-2A satellite images, testing soil water availability, and measuring leaf proline content. The study utilized the Leaf Water Content Index (LWCI) and Enhanced Vegetation Index (EVI) values as models to determine the POSI from the satellite images. Furthermore, soil physics analysis and proline values from the 17th leaf sample were used to assess the plants’ water availability and stress levels. The satellite images showed signs of potential stress in October; observation blocks in October had a pF value of 4.2 between 14.93%-16.77% compared to the water content, which ranged from 13.79%-15.09% supported by decreased soil water levels and increased proline accumulation occurred in October a value of 0.0382-0.0391 mg/g, compared to June, which is 0.0143-0.0159 mg/g. All areas were healthy from June to August; however, potential stress, as indicated by POSI values, their formulation, and color changes, was present in September and October.

Optimizing Potassium Fertilization for Precision Nutrition: Effects on Growth, Physiology, and Seed Potassium Content of Two Soybean Varieties Ratu Fatkhunnisa; Supijatno Supijatno; Edi Santosa
Journal of Tropical Crop Science Vol. 13 No. 02 (2026): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.13.02.335-349

Potassium is an essential macronutrient that supports major physiological processes in plants and strongly influences soybean productivity. This study aimed to evaluate the effects of different potassium fertilization levels on plant physiology, yield performance, and seed nutritional composition in two soybean varieties, ‘Dena 1’ and ‘Denasa 1’.The research employed a factorial completely randomized group design with five potassium fertilizer levels (0, 15, 30, 45, and 60 kg K2O/ha) and two soybean varieties (‘Dena 1’ and ‘Denasa 1’), with three replications. The results showed that the potassium dose significantly affected plant height and leaf number but did not influence photosynthetic rate or stomatal conductance. The ‘Dena 1’ variety exhibited better growth, greater leaf greenness, and faster generative development than ‘Denasa 1’. The optimal potassium dose of 45 kg/ha improved yield components, resulting in a 30.7% increase in seed weight and a 45.8% increase in the number of filled pods compared with the control. A positive correlation was found between plant potassium content and key physiological traits, such as photosynthesis and transpiration rates. Seed nutrition analysis showed that soybean varieties significantly influenced nitrogen and phosphorus levels at the R7 and R8 stages, whereas the potassium fertilization dose had no significant effect on seed nutrient concentrations. Nutrient levels increased from R6 to R7 before declining at R8, reflecting nutrient redistribution during seed filling. Overall, the results suggest that applying 45 kg K2 O/ha is an effective fertilization rate for enhancing soybean physiological performance and yield, while varietal characteristics remain the primary factor shaping seed nutritional composition.

Pengaruh Beberapa Jenis Pupuk Hayati terhadap Pertumbuhan Dua Klon Tanaman Teh (Camellia sinensis (L) O. Kuntze) Belum Menghasilkan Ade Wachjar; , Supijatno; Dina Rubiana
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 34 No. 3 (2006): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The experiment was carried out to study the effect of biofertilizer on the growth of two clones of young tea. This experiment was conducted at Cikabayan Experiment Station, Faculty of Agricuture, IPB, Bogor, from July to November 2000. This experiment was arranged in Split Plot Design with three replications. The main factor was clone types consisted of two clones i.e.: RB 3 and Gambung 5, whereas the sub factor was biofertilizer consisted of five kinds i.e. : EMAS + 50 % inorganic fertilizer recommended dosage (i.f.r.d.), EM4 + 50 % i.f.r.d., OST + 50 % i.f.r.d., Soils Plus + 50 % i.f.r.d. and 100 % i.f.r.d. The results showed that the EMAS + 50 % i.f.r.d. and EM4 + 50 % i.f.r.d. treatments significantly increased plant height, stem diameter, leaf number, and bud length. The application of 6.25 g EMAS per plant (equivalent with 83.125 kg/ha) + 50 % i.f.r.d. and 10 ml EM4 (equivalent with 6.65 l/ha) + 50 % i.f.r.d. could reduce application of inorganic fertilizer dosage until 50 % and resulted in the growth of the plant which was better than that of inorganic fertilizer. In general, growth of the RB 3 clone was better than Gambung 5 clone. Key words : Biofertilizer, clones, vegetative growth, tea

TOLERANSI TANAMAN KEDELAI TERHADAP CEKAMAN AIR: UJI LAPANG BEBERAPA GENOTIPE TOLERAN Didy Sopandie; , Hamin; Muhammad Jusuf; , Supijatno
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 25 No. 2 (1997): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The purpose of this field verification was to determine the stability of yield of several drought-tolerant soybean genotypes selected from green house evaluation. The plants were planted at Muneng, Probolinggo in dry season (June-September 1995) with and without irrigation. From 5 tolerant genotypes, Mlg 2999 and Mlg 3474 gave a good stability of tolerance as evidence by less significance of growth and grain yield reduction. The tolerant genotypes of Mlg 2805 and Mlg 2984 suffered from tremendous leaves and pods abcission, leading to low yield.

PENGARUH JUMLAH AJIR DAN JUMLAH DAUN PADA AJIR TERHADAP PERTUMBUHAN TUNAS DAN SAAT MANJING PETIK PERTAMA PADA PEMANGKASAN AJIR TANAMAN TEH (Camellia sinensis L.) DI DATARAN TINGGI Ade Wachjar; , Supijatno; Riswan Basyri Nasution
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 23 No. 1 (1995): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The experiment was aimed to study the effect of number of lungs and leaves at lung to growth of shoots and first time harvest at lung pruning of height land tea (Camellia sinensis). The experiment carried out at Gedeh Tea Plantation, PTPN XII, Cianjur, West Java, from December 1993 to March 1994. In this case we used tea Clone TRI 2025. The experiment was arranged in Randomized Block Design with 3 replications. The first factor, number of lungs, consisted of 3 different level : 2, 3, 4 lungs per tea. The second factor, number of leaves at lung, consisted of 3 different levels : 25, 50, and 75 leaves per lung. The Experiment showed that number of shoots and first time harvest affected by number of lungs, but number of lungs didn't affect to height of shoot, percentage of banji, wet weight shoots on tipping and first pluck production were not affected. The tea with 4 lungs had significantly greater number of shoots than 2 or 3 lungs. The earliest first harvest time was achieved by 2 lungs tea (3 to 9 days earlier), but was significant with 3 lungs tea.

FISIOLOGI DAYA ADAPTASI KEDELAI (Glycine max (L.) Merr.) TERHADAP CEKAMAN pH RENDAH DENGAN Al TINGGI , Supijatno; D. Sopandie; M. Jusuf; S. Harran
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 23 No. 2 (1995): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Two AI-tolerant genotypes (KB 44001 and Genjah Jepang) and two AI-sensitive genotypes of soybean (Kedelai Lumut and KB 46015) were subjected to Al concentration (1.50 mM Al with pH 4.0) in hydroculture for 3 weeks; the growth and their physiological responses were identified by measuring the changes of pH media, NO3ˉ /NH4+ uptake, ion absorption and organic acid content in the tissues. The result revealed that Al-tolerant genotypes soybean show a much better growth than the sensitive genotypes. Moreover, the tolerant genotypes showed the different responses to Al stress; they changed the pH media more significantly, accumulated less Al in the roots and accumulated more oxalate acid than the sensitive genotypes. Both the tolerant and sensitive genotypes had similar pattern n in N03ˉ /NH4+ uptake and other cation uptake. The results suggested that tolerance of soybean genotypes to Al toxicity is associated with their ability in the exclusion AI.

Evaluasi Konsumsi Air Beberapa Genotipe Padi untuk Potensi Efisiensi Penggunaan Air , Supijatno; Muhammad Ahmad Chozin; Didy Sopandie; , Trikoesoemaningtyas; Ahmad Junaedi; Iskandar Lubis
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 40 No. 1 (2012): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Water use efficient varieties in rice may have good opportunity in term of economic value and scarcity of water. This study was conducted to determine water consumption among rice genotypes that conventionally cultivated as low land (IR64, IPB97-F-15, Ciherang, Mentik Wangi, and Rokan hybrid), up land (Jatiluhur, Silugonggo), and amphibian type (Way Apo Buru, that could be planted both as lowland and up land). Rice seedlings at 14 days old were transplanted in a plastic container containing 83 kg of air dried soil, 1 plant per whole and 6 plants per container. The experiment was conducted in a vinyl house, using randomized complete block design with three replications. During rice growth, water table was maintained at 2 cm above soil surface, and water was added and recorded weekly. The results showed that varieties reveal production components and yield were different significantly. Water consumptions among varieties were significantly different, ranged from 15.93 L plant-1 for IR64 to 24.13 L plant-1 for Jatiluhur, or equal with 3,639 to 4,827 m3 ha-1. Jatiluhur was the most efficient variety in using water. This finding may guide us to explore benefit of water use efficient variety as sustainable option in water management of rice cultivation.

Evaluation of water-saving rice status based on morphophysiological characteristics and water use efficiency Didi Darmadi; AHMAD JUNAEDI; DIDY SOPANDIE; SUPIJATNO; ISKANDAR LUBIS; KOKI HOMMA; NURIL HIDAYATI
Biodiversitas Journal of Biological Diversity Vol. 20 No. 10 (2019)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d201006

Abstract. Darmadi D, Junaedi A, Sopandie D, Supijatno, Lubis I, Homma K, Hidayati N. 2019. Evaluation of water-saving rice status based on morphophysiological characteristics and water use efficiency. Biodiversitas 20: 2815-2823. One strategy to anticipate water shortages in rice production is to use varieties that are efficient in using water and produce high yields. The aim of this study was to measure water consumption, water use efficiency and production performance of several types of rice. The research was conducted during the rainy season from January to April 2018 and the dry season from August to November 2018 in a greenhouse. This study used a completely randomized design. The genetic materials used were 8 varieties consisting of lowland rice (sawah), upland rice (gogo), and land race. The variables analyzed included morphological and physiological characteristics. The results showed that differences in rice types indicated diverse responses to morphological and physiological characteristics on water consumption and water use efficiency (WUE). Mentik Wangi variety had the highest water consumption of 24.1 liters. The IPB 9 G and Jatiluhur varieties achieved the highest water use efficiency of 2.4 and 2.3, respectively. Based on the heatmap analysis, both varieties had similarities in the morphological characteristics of long roots, high root weights, long and broad leaves, and high total grain counts per panicle. The similarity of physiological characteristics was high rates of photosynthesis and low transpiration. Varieties that achieve the highest water use efficiency have the potential to be developed into varieties that are tolerant to limited water conditions.

Co-Authors , Hamin . Robianto . Sudradjat . Susilawati . Susilawati . Turman Abdoellah, Soetanto Abdul Qadir Abdul Qadir Ade Wachjar Ade Wachjar Adolf Pieter Lontoh, Adolf Pieter Adrian, Fahrul AHMAD JUNAEDI Ahmad, Fendri Ahmad, Fendri Aji, Martini Albari, Jabal Aldi Radifan Alhaviz, Alhaviz Anggraini, Dwi Vista Ani Kurniawati Anisa Windhita Anjeli Sulistianti Paisey Aris Purwanto Arja, Awliya Rahmi Awliya Rahmi Arja Aziz Ahmad Ja’far Bagus Arfanda Benny Julyan Besse Amriati Besse Amriati Bintoro, Muhammad Hasjim Brury Marco Silalahi D. Sopandie Darius Dare Deden Drajat Matra Didi Darmadi DIDY SOPANDIE Didy Sopandie Dr.-Ing. Dina Rubiana Widarda Dwi Guntoro Edi Santosa Eko Sulistyono Elda Kristiani Paisey Elda Kristiani Paisey Eltis Panca Ningsih, Eltis Panca Eny Widajati Evi Savitri Iriani Evi Savitri Iriani Fadillah, Resti Faqih Udin Fatkhunnisa, Ratu Febrianto, Hendra Nugroho Feni Shintarika Gabriel, Abdurrahman Gery Juliansyah Ghulam Nurul Huda Ghulam Nurul Huda, Ghulam Nurul Hariyadi Harry Imantho Hayu Siwi Hayu Siwi Pribadi Hendra Wiguna Hulu, Versi Putra Jaya Humoen, Maria Imelda ISKANDAR LUBIS Iskandar Lubis Jabal Albari Juliansyah, Gery Julyan, Benny KOKI HOMMA Kusnendi, Faizal Shofwan Laksono, Purwanti Budi M. Jusuf Marlin Sefrila Martini Aji Martini Aji Maryati Sari Matra, Deden Drajat Maulia, Kantrin Maulia, Kantrin Miftah Anugrah Pamungkas Monica Christina Natalia Muhamad Achmad Chozin Muhamad Ismail Muhamad Ismail, Muhamad Muhammad Hasjim Bintoro Djoefrie Hasjim Bintoro Djoefrie Muhammad Jusuf Mulyawan, Zidane Natalia, Monica Christina Novie Pranata Erdiansyah Nur Said Soheh NURIL HIDAYATI Nurlailah Nurlailah Nurulhaq, Muhammad Iqbal Omo Rusdiana Paisey, Elda Kristiani Pamungkas, Miftah Anugrah Putri Ratna Sari Putri Ratna Sari, Putri Ratna Radifan, Aldi Rahman, Hasan Basri Arif Ratu Fatkhunnisa Riswan Basyri Nasution Robianto, . Rohman, Fadil S. Harran Saiful Akhyar Lubis Sarjono, Arif Sarjono, Arif Sepriana, Regina Maulidina Silalahi, Brury Marco Siti Halimatus Sadiyah Slamet Widodo Sudirman Yahya Sudradjat , Sudradjat Sudradjat Sugeng Heri Suseno Syarifah Iis Aisyah Trikoesoemaningtyas Turman, . Wahyudi, Trio Widodo, Candraningratri Ekaputri Widyaningrum Widyaningrum Widyaningrum Widyaningrum Wiguna, Hendra Windhita, Anisa Yanto Ardiyanto Zaman, Sofyan Zarima Wibawati ‪Mochamad Hasjim Bintoro Djoefrie‬

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