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Plantropica: Journal of Agricultural Science
Published by Universitas Brawijaya
ISSN : -     EISSN : 25416677     DOI : http://dx.doi.org/10.21776/ub.jpt
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
PLANTROPICA: Journal of Agricultural Science aims to provide a forum for international researchers on applied agricultural science to publish the original articles. The scope of PLANTROPICA: Journal of Agricultural Science are crop science, agronomy, horticulture, plant breeding, agricultural environmental resources, agricultural climatology and plant physiology.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Agronomi dan Ilmu Tanaman
Articles 312 Documents
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Growth Yield and Nutrient Requirement of Adlay (Coix lacryma-jobi L.) Applied with Different Levels of Nitrogen in Bukidnon Philippines Miñoza, Michelle Mae Recla; Planas, Juvelyn Yacunas; Labajo, John Rey Natinga
Plantropica: Journal of Agricultural Science Vol. 8 No. 2 (2023)
Publisher : Department of Agronomy, Faculty of Agriculture, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpt.2023.008.2.01

Abstract

The study was conducted at Agricultural Experiment Center, Central Mindanao University, Musuan, Maramag, Bukidnon from August 2018 to January 2019 with the following objectives: (1) evaluate the effects of different rates of N on the soil chemical properties at harvest; (2) evaluate the effects of different rates of N on the growth of adlay; and (3) determine the cost and return analysis of adlay applied with different rates of Nitrogen. The field experiment was laid out in Randomized Completely Block Design (RCBD) with six treatments, replicated thrice with 18 experimental units. The fertilizer rate used for the experimental site was 50 kg of P2O5 ha-1 and 20 kg of K2O ha-1. Different Nitrogen rates were used (0, 30, 60, 80, 100, 120 kg ha-1). Based on the results, soil properties, including pH and extractable P at harvest, were noted to be not significantly affected by the application of different treatments; however, organic matter and exchangeable K were significantly affected by the treatments. Treatment 4, with 80 kg N ha-1,has the highest grain yield and return on investment, hence the most economical treatment.
Induced Resistance of Rice Plants to Brown Planthoppers (Nilaparvata lugens Stål.) Through The Application of Compost SyamsulHadi, Mochammad; Taufiqurrahman, Achmad Fitriadi; Rahardjo, Bambang Tri; Tarno, Hagus
Plantropica: Journal of Agricultural Science Vol. 8 No. 2 (2023)
Publisher : Department of Agronomy, Faculty of Agriculture, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpt.2023.008.2.09

Abstract

The brown planthopper (Nilaparvata lugens Stål) poses a major threat to rice plants. Integrated Pest Management (IPM) emphasizes induced resistance as a cost-effective and sustainable strategy for protection. This research aims to investigate the impact of compost on rice plant resistance against brown planthoppers, the levels of silicate (SiO2) content and stem hardness in rice, and the mechanisms of resistance in rice plants attributed to compost. The research was conducted from June to November 2022 at the screen house of the Faculty of Agriculture, Brawijaya University and the Pest Laboratory, Department of Plant Pests and Diseases, Faculty of Agriculture, Brawijaya University. Analysis of silicate content (SiO2) was carried out at the Indonesian Sugar Plantation Research Center Laboratory. Analysis of the hardness lever of rice stem was carried out at the Food Quality and Safety Testing Laboratory, Faculty of Agricultural Technology, Brawijaya University. A randomized design featured 5 treatments and 5 replications, including varying compost doses (8, 11, 14, and 17 t ha-1) and a compost-free control. Parameters observed were brown planthopper mortality, damage intensity, silicate content, and stem hardness. Results exhibited compost is positive impact on brown planthopper mortality, reduced damage, higher silicate content, and increased stem hardness with higher compost doses. This research highlights compost is potential in enhancing rice plant resistance and protecting crops in an environmentally friendly manner.
Exploration of Symbiont Bacteria Potentially Degrading Chlorpyrifos Insecticide in the Digestive Tract of Beet Armyworm (Spodoptera exigua) in Kediri Regency Widjayanti, Tita; Hadi, Mochammad Syamsul; Tantri, Zalfa Meiska
Plantropica: Journal of Agricultural Science Vol. 8 No. 2 (2023)
Publisher : Department of Agronomy, Faculty of Agriculture, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpt.2023.008.2.10

Abstract

Spodoptera exigua Hubner (Lepidoptera: Noctuidae) is an important pest on shallot crops and cosmopolitan with a fast life cycle. In controlling S. exigua farmers use chemical insecticides such as chlorpyrifos. Intensive application of insecticides causes resistance of S. exigua. Resistance can occur due to several factors, one of which is biological factors. In biological factors, there is a symbiosis between pests and beneficial bacteria called symbiont bacteria. It is suspected that symbiont bacteria symbiotic with S. exigua can degrade chlorpyrifos. The research was conducted from December 2022 to May 2023. The research began with a site survey and sampling in three sub-districts in Kediri Regency, namely Plemahan District, Kepung District, and Badas District. Furthermore, samples of S. exigua were studied at the Pesticide Toxicology Laboratory, Brawijaya University. The research conducted includes (1) exploration, isolation, and purification of symbiont bacteria in the digestive tract of S. exigua, (2) bioassay test of symbiont bacteria that have the potential to degrade chlorpyrifos, and (3) characterization of bacteria that have the potential to degrade chlorpyrifos. The results of the exploration of symbiont bacteria in the digestive tract of S. exigua obtained as many as 45 isolates of bacteria capable of growing in NA + chlorpyrifos media. Furthermore, from bioassay testing, 14 isolates of bacteria that have the potential to degrade chlorpyrifos insects. The characterization results showed that bacterial isolates that have the potential to degrade chlorpyrifos insecticides come from the genera Pantoea, Erwinia, and Coryneform.
Response of Orchid Root Explants (Dendrobium sp.) to The Concentration and Duration Soaking of Hydrogen Peroxide (H2O2) Mtd, Siti Latipah; Yulianah, Izmi; Agisimanto, Dita
Plantropica: Journal of Agricultural Science Vol. 11 No. 1 (2026): Februari
Publisher : Department of Agronomy, Faculty of Agriculture, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpt.2026.011.1.1

Abstract

Orchids are plants that have aesthetic value and high selling value. The increase in orchid production means that orchid seed propagation needs to develop. Orchid propagation using Root Apical Meristem (RAM) is more effective than Shoot Apical Meristem (SAM) because it does not harm the mother plant. However, orchid seed propagation often fails due to high explant contamination. Therefore, there is a need for analysis regarding the accuracy of sterilization using hydrogen peroxide (H2O2) to reduce contamination rates. This research aimed to study differences in the level of contamination and viability explants in orchid root explants concerning the concentration and duration of soaking in hydrogen peroxide (H2O2). The research was conducted from February to May 2023 at PT Java Indo Arjuna (JAVINA). The experiment in this research uses a 2-factor Completely Randomized Factorial Design (CRFD) in 3 repetitions. The first factor uses 10 levels of H2O2 treatment, and the second factor is 2 orchid species, namely Dendrobium amosmum alba and Dendrobium welirang. Based on the research results, there were no significant differences in the H2O2 treatment and the interaction between the two factors. However, it was found that there were real differences in species factors. Therefore, there were differences in the responses of the two species to the level of contamination, browning and viability explants. The use of H2O2 cannot be used to sterilize explant tissue because of the high percentage of bacterial contamination. However, the use of H2O2 is effective for surface sterilization because the percentage of fungal contamination is low in Dendrobium anosmum alba and Dendrobium welirang.
Dynamics of Understory Vegetation in Agroforestry and Monoculture Teak (Tectona grandis) Stands during Wet and Dry Seasons Setiawan, Adi; Kholifah, Izzah Nurul; Ramadhana, Varotama Putra
Plantropica: Journal of Agricultural Science Vol. 11 No. 1 (2026): Februari
Publisher : Department of Agronomy, Faculty of Agriculture, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpt.2026.011.1.4

Abstract

Planting patterns and seasonal variability strongly influence the diversity, dynamics, and species composition of understory vegetation in teak (Tectona grandis), a deciduous tree species. This study aimed to assess species diversity, dynamics, and composition of understory vegetation under agroforestry (AF) and monoculture (MN) teak systems during the wet season (WS) and dry season (DS). Field surveys were conducted in February–March and July–August 2023 in teak production forests managed by Perum Perhutani, Kalipare District, Malang Regency, East Java, Indonesia. A total of 117 systematically distributed 1 × 1 m plots were established, consisting of 27 plots in AF and 90 plots in MN stands, with 5 m spacing between plots. Plot locations were recorded using a Global Positioning System (GPS). Within each plot, understory species composition, percentage cover of vegetation, litter, and bare soil were recorded, and Sørensen similarity indices were calculated. Environmental variables measured included canopy openness and rainfall. Canopy openness was quantified using hemispherical photographs taken at 1 m above ground level with a 360° camera and analyzed using GLA 2.0 software. Rainfall data were obtained from the local climatological station. The results revealed clear differences in understory species composition between AF and MN systems. Monoculture teak stands supported 49 species belonging to 23 families, whereas agroforestry stands contained 35 species from 16 families. Vegetation composition and structure differed substantially between AF and MN systems. Understory diversity in MN stands during the dry season was higher than in AF stands, likely because agroforestry practices in the study area resemble intensive monoculture of annual crops. Canopy openness and rainfall were identified as significant drivers influencing understory vegetation cover.
Flood Prediction Using Modeling Extreme Rainfall in East Java, Indonesia Irsandy, Diego; Astutik, Suci; Astuti, Ani Budi
Plantropica: Journal of Agricultural Science Vol. 11 No. 1 (2026): Februari
Publisher : Department of Agronomy, Faculty of Agriculture, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpt.2026.011.1.2

Abstract

Extreme value theory (EVT) is a statistical method that is concerned with the analysis of the extreme values of a distribution. EVT is often used to model the behavior of rare and extreme events, such as floods caused by extreme rainfall phenomena. There are two methods for identifying the movement of extreme values, namely Block Maxima (BM) and Peaks over Threshold (POT). The Generalized Extreme Value (GEV) distribution has three parameters and is used to model the distribution of extreme values using the BM method. On the other hand, the classic method of EVT does not capture uncertainty in the data. The Bayesian method is one of the statistical methods that can use information from data and prior knowledge. This research aims to model EVT-BM using a Bayesian approach for rainfall data at eleven weather stations in Jawa Timur. The result shows that all rainfall distributions at different weather conditions have a value of the parameter shape equal to 0, which implies a Weibull distribution. This paper also provides return level of 6 months, 2, 5, and 10 years respectively.
Respon Dua Varietas Selada (Lactuca sativa L.) untuk Pembentukan Planlet terhadap Pengaplikasian Kombinasi Konsentrasi Benzylaminopurine (BAP) dan Kinetin Anggraeni, Yulia; Devy, Nirmala Friyanti; Agisimanto, Dita; Saptadi, Darmawan
Plantropica: Journal of Agricultural Science Vol. 11 No. 1 (2026): Februari
Publisher : Department of Agronomy, Faculty of Agriculture, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpt.2026.011.1.3

Abstract

Selada merupakan salah satu tanaman sayuran daun yang dikonsumsi sebagai pelengkap makanan dan mengandung gizi yang tinggi. Umumnya, perbanyakan pada tanaman ini dilakukan secara generatif, salah satunya hidroponik yang menggunakan benih hibrida. Iklim tropis di Indonesia menyebabkan proses pembungaan selada menjadi terkendala sehingga produksi benih hibrida tidak dapat dilakukan secara mandiri. Kultur jaringan merupakan salah satu perbanyakan vegetatif untuk memenuhi ketersediaan benih hibrida dan dapat mengurangi biaya produksi. Penambahan zat pengatur tumbuh (ZPT) berupa auksin seperti IAA (Indole Acetic Acid) dan sitokinin seperti TDZ (Thidiazuron), BAP (Benzylaminopurine), dan Kinetin dapat berpengaruh terhadap keberhasilan perbanyakan. Penelitian ini bertujuan untuk mempelajari pengaruh kombinasi konsentrasi BAP dan Kinetin terhadap pembentukan planlet dua varietas selada. Penelitian dilakukan menggunakan Rancangan Acak Kelompok (RAK) dengan 2 faktor. Faktor pertama adalah varietas selada, faktor kedua adalah konsentrasi BAP dan kinetin yang masing-masing terdiri dari empat konsentrasi yang dikombinasikan yaitu 0, 0,5, 1,0, dan 1,5 mgL-1. Penelitian ini terdiri dari 32 kombinasi perlakuan dan 3 ulangan sehingga terdapat 96 unit percobaan yang setiap unitnya terdiri atas 3 botol dengan 3 eksplan/botol. Hasil penelitian menunjukkan bahwa BAP dan kinetin memberikan pengaruh terhadap pertumbuhan eksplan tangkai daun selada. Perlakuan K4 dan K15 pada eksplan varietas Archivel bagian pangkal memiliki persentase eksplan bertunas berakar paling tinggi yaitu 44,4%. Eksplan varietas Archivel juga memiliki pertumbuhan lebih baik dibandingkan eksplan varietas Tiberius.
The Effect of Fertilizer and Variety Combinations in Determining Thermal units in Red Chili Plants (Capsicum annuum L.) Jamilah, Hariratun; Hariyono, Didik
Plantropica: Journal of Agricultural Science Vol. 11 No. 1 (2026): Februari
Publisher : Department of Agronomy, Faculty of Agriculture, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpt.2026.011.1.7

Abstract

Red chili (Capsicum annuum L.) is a vegetable commodity with high economic value. The level of fruit maturity when harvested is a factor that influences the physical and chemical quality of red chilies. The method that can be used to determine the right harvest time is by accumulating thermal units. So efforts are needed to maintain optimal environmental conditions in providing thermal units, namely by using varieties and applying fertilizer. The research aims to determine the thermal unit in red chili plants due to the influence of the combination of fertilizer and variety. The research was carried out from January to May 2024 in Tegalgondo Village, Karangploso District, Malang Regency. The tools used are a hoe, analytical scales, camera, maximum-minimum thermometer, stakes, and writing tools. The materials used are red chili seeds of Imperial 10 and Horison 97 varieties, goat manure, NPK 16:16:16, Urea and silver black plastic mulch. This research used a Randomized Block Design (RBD) with 6 treatment combinations and 4 replications, consisting of P1 (Imperial 10 variety + NPK fertilizer and manure), P2 (Imperial 10 variety + NPK fertilizer), P3 (Imperial 10 variety + manure), P4 (Horizon 97 variety + NPK fertilizer and manure), P5 (Horizon 97 Variety + NPK fertilizer), P6 (Horizon 97 Variety + manure). The research results showed that the lowest thermal unit values ​​were found in the Imperial + manure and NPK treatments in the growth and flowering phases, as well as Imperial and manure in the germination and ripening phases. The Imperial 10 + manure treatment had lower yields than the Horison 97 + manure and NPK treatment.
Pengaruh Dosis Pupuk Kandang Ayam dan Konsentrasi PGPR pada Pertumbuhan dan Hasil Tanaman Terong (Solanum melongena L.) Suminarti, Nur Edy; Aldiansyah, Hernando
Plantropica: Journal of Agricultural Science Vol. 11 No. 1 (2026): Februari
Publisher : Department of Agronomy, Faculty of Agriculture, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpt.2026.011.1.10

Abstract

Salah satu penyebab rendahnya produktivitas tanaman terong sebagai akibat rendahnya daya dukung lahan. Hal ini sangat terkait bahwa umumnya tanaman terong saat ini banyak dibudidayakan di lahan pekarangan yang syarat dengan rendahnya nutrisi maupun bahan organik tanah. Oleh karena itu dalam upaya untuk dapat meningkatkan produksi buah terong per satuan luas dan waktu, maka aplikasi pupuk kandang ayam dan PGPR perlu dilakukan. Penelitian yang bertujuan untuk mendapatkan kombinasi yang sesuai antara pupuk kandang ayam dan konsentrasi PGPR telah dilakukan pada bulan Mei – September 2023, di Dusun Kasin, Desa Ampeldento, Kecamatan Karang Ploso, Kabupaten Malang, Jawa Timur yang terletak pada 7°54′38″ Lintang Selatan dan sekitar 112°36′05″ Bujur Timur. Penelitian menggunakan Rancangan Petak Terbagi dengan menempatkan pupuk kandang ayam pada petak utama, terdiri dari 3 taraf, yaitu (tanpa, dengan 50%, dan 100%) pupuk kandang ayam.  Konentrasi PGPR dietmpatkan pada anak petak, terdiri dari 3 taraf, yaitu (tanpa, dengan 15 mL, dan 30 mL) PGPR/L air.  Hasil penelitian menunjukkan adanya interaksi nyata hanya pada peubah jumlah daun.  Pupuk kandang ayam maupun PGPR juga memberi pengaruh nyata pada bobot buah terong ekonomis ha-1r. Aplikasi 100% dosis pupuk kendang ayam mampu meningkatkan bobot segar buah rerong konsumsi masing -masing sebesar  38,55% (7,27 t ha-1) dan 233,71% (18,3 t ha-1) dari pemberian (50% dan tanpa) pupuk kandang ayam.  Penggunaan 15 mL dan 30 mL PGPR L-1 air mampu meningkatkan bobot segar buah terong ekonomis masing-masing sebesar 22,95% (3,48 t ha-1) dan 25,71% (4,71 t ha-1) dari pada tanpa PGPR.
Pengamatan Fenologi pada Beberapa Varietas Zukini (Cucurbita pepo L.) Menggunakan Konsep Thermal Unit Angraini, Nicky; Herlina, Ninuk
Plantropica: Journal of Agricultural Science Vol. 11 No. 1 (2026): Februari
Publisher : Department of Agronomy, Faculty of Agriculture, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpt.2026.011.1.6

Abstract

Suhu udara yang optimal untuk pertumbuhan zukini adalah 18-24ºC, sehingga di Indonesia tanaman ini dibudidayakan di dataran tinggi. Suhu udara berpengaruh terhadap lamanya periode pertumbuhan dan perkembangan tanaman. Metode pendekatan untuk mengetahui hubungan suhu dengan fenologi tanaman adalah thermal unit. Selain suhu udara, varietas tanaman juga mempengaruhi nilai thermal unit. Penelitian ini bertujuan untuk mempelajari fenologi, pertumbuhan dan perkembangan 4 varietas zukini berdasarkan konsep thermal unit. Penelitian dilakukan di Desa Ampeldento, Kecamatan Karangploso, Kabupaten Malang, Jawa Timur (± 615 mdpl) pada bulan Juni – Agustus 2024. Hasil penelitian menunjukkan bahwa nilai thermal unit sangat dipengaruhi oleh varietas. Varietas Jacky Z6 membutuhkan thermal unit yang lebih rendah pada setiap fase pertumbuhan tanaman. Thermal unit yang dibutuhkan untuk mencapai fase berkecambah, muncul daun sejati, berbunga jantan, berbunga betina dan panen pada varietas Jacky Z6 masing-masing sebesar: 113,60; 175,52; 570,24; 586,62 dan 649,38 hari ºC. Varietas Shuky membutuhkan 125,63; 173,72; 589,55; 605,66 dan 670,68 hari ºC, varietas Jewel membutuhkan 121,34; 173,44; 606,91; 623,11 dan 695,61 hari ºC dan varietas Black Foogie memiliki kebutuhan thermal unit tertinggi: 131,62; 185,55; 626,22; 646,57 dan 699,79 hari ºC. Varietas Jacky Z6 mempunyai jumlah daun yang lebih banyak dibandingkan varietas Jewel, Shuky dan Black Foogie. Produksi buah per hektar varietas Jacky Z6, Jewel dan Shuky 44,14; 31,07 dan 50,56% lebih tinggi dibandingkan varietas Black Foogie.

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