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All Journal Caraka Tani: Journal of Sustainable Agriculture ISTEK
Liberty Chaidir, Liberty
Fakultas Sains dan Teknologi UIN Sunan Gunung Djati Bandung
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Electrical & Electronics Engineering

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THE EFFECT OF POLYVINYL PYROLYDONE (PVP), EXPLANT TYPE, AND EXPLANT PLANTING POSITION ON CALLUS GROWTH OF CIKONENG ST LARGE ORANGE (Citrus maxima (Burm.) Merr) AND SWEET ORANGE (Citrus sinensis (L.) Osbeck) Chaidir, Liberty; Pertiwi, Rahmi
ISTEK Vol. 14 No. 2 (2025)
Publisher : Fakultas Sains dan Teknologi UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/istek.v14i2.1339

Abstract

Cikoneng ST Orange (Citrus maxima (Burm.) Merr) is a germplasm of Sumedang area, which has been scarce for the past few years. The high percentage of browning in Cikoneng ST Orange explants is considered to be the cause of the low percentage of research success. Sweet Orange (Citrus sinensis (L.) Osbeck) is a type of orange that has been widely used as a potential orange explant in tissue culture. This study was conducted to determine the comparison of growth percentage by conducting cross-species research between Cikoneng ST Orange and Sweet Orange. The study was conducted at the Tissue Culture Laboratory of the Agrotechnology Department, Sunan Gunung Djati State Islamic University, Bandung from March to June 2017. The media used was a combination of MS media, 2 mg L-1 2.4 D, and 0.5% PVP. The explants used were leaves and leaf shoots of Cikoneng ST Orange and Sweet Orange. The planting positions of the explants included abaxial and adaxial planting positions. The study was analyzed using a descriptive method. The results showed that the administration of PVP in MS media and 2 mg L-1 2.4 D could induce callus of Sweet Orange at 3 DAI and Cikoneng ST Orange at 5 DAI. The use of leaf shoot explants and adaxial planting position produced the best friable callus up to 28 DAI. This study also found that Sweet Orange had the fastest callus growth time and a low browning percentage compared to Cikoneng ST Orange explants.
Arthropod Community Structure Indicating Soil Quality Recovery in the Organic Agroecosystem of Mount Ciremai National Park’s Buffer Zone Kurniawan, Isma Dwi; Kinasih, Ida; Akbar, Rahmat Taufiq Mustahiq; Chaidir, Liberty; Iqbal, Sawaludin; Pamungkas, Bayu; Imanudin, Zikri
Caraka Tani: Journal of Sustainable Agriculture Vol 38, No 2 (2023): October
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/carakatani.v38i2.69384

Abstract

The Mount Ciremai National Park (TNGC) buffer zone is designed to support conservation efforts. However, agriculture in this area is dominated by conventional farming that excessively uses synthetic fertilizers, which threatens soil quality. Introducing an organic fertilizer and plant growth-promoting rhizobacteria (PGPR) is expected to enhance soil quality recovery in this area. This study aimed to analyze the differences in soil arthropod communities between organic and conventional agriculture and a forest in the TNGC buffer zone to assess soil quality improvement generated by the application of the organic fertilizer and PGPR. Soil arthropods were collected with Berlese-Tullgren funnels and pitfall traps. Several associated environmental parameters, including soil pH, C-organic, temperature, and moisture, were also measured. Data were analyzed using ecological indices (i.e., richness, diversity, evenness, dominance, similarity) and soil biological quality (QBS-ar). Non-metric multidimensional scaling (NMDS) was performed to examine the relation of arthropods with environmental parameters. In total, 957 individuals of soil arthropods belonging to four classes and 15 orders were recorded. Berlese-Tullgren and pitfall traps resulted in a similar tendency in most variables, with higher richness, diversity, and evenness values in the forest, followed by organic and conventional habitats. In addition, similarity and QBS-ar indicated that forest and organic communities were more similar than conventional community. C-organic, soil moisture and pH were considered the most deciding environmental parameters for arthropod assemblages. All measured variables in this study illustrated better soil quality in organic than in conventional agriculture. This study implicates the benefit of utilizing organic fertilizers and PGPR for soil quality restoration in agroecosystems.
Co-Authors Akbar, Rahmat Taufiq Mustahiq bayu pamungkas Ida Kinasih Imanudin, Zikri Iqbal, Sawaludin Kurniawan, Isma Dwi Pertiwi, Rahmi