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All Journal Jurnal Agrotek Tropika Andalasian International Journal of Agricultural and Natural Sciences Jagur: Jurnal Agroteknologi
Hayati, PK Dewi
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering

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Journal : Jagur: Jurnal Agroteknologi

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Penampilan Morfologi dan Sitologi Tanaman Semangka (Citrullus lanatus Thunb.) Hasil Induksi Senyawa Kolkisin Aswat, Amarilla; Hayati, PK Dewi; Sutoyo; Warnita; Kuswandi
JURNAL AGROTEKNOLOGI UNIVERSITAS ANDALAS Vol 7 No 1 (2025)
Publisher : Jurusan Budidaya Pertanian Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jagur.7.1.11-17.2025

Abstract

Seedless watermelons, both seeds and fruits, possess a significantly higher economic value than their seeded counterparts. Serif Saga Agrihorti, a variety developed by the Tropical Fruit Research Institute, offers several advantages, including a sweet taste, high fruit yield, bright red flesh, and large fruit size. However, it is characterized by a relatively high number of seeds. The development of a new seedless variety from Serif Saga Agrihorti is crucial. Polyploid induction using mutagenic agents like colchicine is an effective method to obtain tetraploid female parents. This study aimed to identify the optimal method and colchicine concentration for inducing polyploidy in watermelons and to produce putative tetraploid plants. Polyploid induction was conducted using two methods: directly applying colchicine solution to plant shoots and soaking seeds in colchicine solution for 24 and 48 hours at concentrations of 0.2% and 0.4%. The observed traits included stem diameter, leaf length and width, stomatal length and width, pollen diameter, pollen viability, male and female flowering periods, harvesting time, fruit weight, fruit diameter, seed count, and seed dimensions (length and width). Data were analyzed using an unpaired t-test using the Statistical Tools for Agricultural Research (STAR) software. The results identified four putative tetraploid genotypes based on morphological observations of pollen diameter, stomatal size, and seed dimensions. In conclusion, seed soaking in colchicine solution effectively induces polyploidy in watermelons compared to shoot application.
Pertumbuhan dan Hasil Tanaman Cabai Rawit (Capsicum frutescens L.) setelah Pemangkasan dengan Pemberian Controlled Release Fertilizer pada Ultisol Majid, Nur Kholish; Hayati, PK Dewi; Suliansyah, Irfan; Ardi
JURNAL AGROTEKNOLOGI UNIVERSITAS ANDALAS Vol 7 No 1 (2025)
Publisher : Jurusan Budidaya Pertanian Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jagur.7.1.33-40.2025

Abstract

Pruning, combined with fertilization, is a feasible agricultural technique to extend the harvest period of bird's eye chilli plants, thereby enhancing farmers' income. This study aimed to examine the interaction between controlled-release fertilizer (CRF) and NPK doses and to determine the optimal dosage of both fertilizers, considering the residual effects of CRF on the growth and yield of bird's eye chilli plants following pruning on Ultisol soil. The experiment was conducted from September 2024 to January 2025 at the Experimental Farm of the Faculty of Agriculture, Universitas Andalas. A Split-Plot Randomized Complete Block Design was employed, with the main plot representing the residual effects of CRF, while the subplots corresponded to different CRF and NPK dosages. The main plot treatments included CRF residual effects at 750 kg/ha, 1000 kg/ha, and 1500 kg/ha, whereas the subplots consisted of CRF application at 750 kg/ha, 1500 kg/ha, and NPK at 1200 kg/ha. Data were subjected to variance analysis (ANOVA) and further assessed using Duncan's Multiple Range Test (DMRT) at a 5% significance level. The results indicated no statistically significant interaction between CRF and NPK dosages and the residual effects of CRF. Applying CRF at 750 kg/ha was the most effective across all residual CRF levels among all tested treatments. The residual CRF dose of 1500 kg/ha positively impacted plant development and fruit production. The findings also revealed that the residual CRF effect contributed to an increased nitrogen supply in the soil, reducing the necessity for additional nitrogen fertilization for bird's eye chilli after pruning cultivation.
Co-Authors Ali Rahmat Ardi Aswat, Amarilla Gustian, G Imelinda, I Indra Dwipa Irfan Suliansyah Kuswandi Majid, Nur Kholish Ranayudha, Adhira Prameswari Ryan Budi Setiawan Sutoyo Warnita