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Abstract
For optimal effects on sweet corn growth and yield, it is critical to determine when to apply Paclobutrazol and how much potassium fertilizer to apply. The goal of the study is to determine the optimal K fertilizer dosage and Paclobutrazol application timing for sweet corn plant growth and yield in peat soil in West Kalimantan, Indonesia. A split-plot design with two factors was used for the study. The time of application of Paclobutrazol 1500 ppm (W) as the main plot and dosage of potassium fertilizer (K) as the subplot. Paclobutrazol's application period only suppressed plant height and leaf number, whereas potassium application markedly enhanced sweet corn yield. Paclobutrazol's application period only reduced plant height by 13.06-28.42 cm. The 5-week (WAP) Paclobutrazol spraying period had the most significant impact on reducing sweet corn plant height. Potassium fertilization significantly improved sweet corn yield components. Doses of 200–300 kg·ha⁻¹ increased cob weight, husk-free cob weight, and cob length relative to lower doses, while cob diameter responded effectively from 100 kg·ha⁻¹ onward. The highest overall performance was achieved at 300 kg·ha⁻¹, indicating that this dose was the most effective for maximizing sweet corn yield under the study conditions.
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Copyright (c) 2025 Baaqiy Amri Annisa, Maulidi Maulidi, Darussalam Darussalam

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References
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- Biswas, S., Saha, A., & Debnath, S. (2023). Effect of Potassium Level on Growth, Yield, Nutrient Uptake, and Economics of Hybrid Maize. Environment and Ecology. 41. 2155-2159. 10.60151/envec/PVAS3711.
- Brar, M. S., Sharma, P., Singh, A., & Sandhu, S. S. (2012). Nitrogen use efficiency (NUE), growth, yield parameters, and yield of Maize (Zea mays L.) as affected by K application. Electron. Int. Fert. Correspondent. 30:3-6.
- Desta, B., Amare, G. 2021. Paclobutrazol as a plant growth regulator. Chem. Biol. Technol. Agric. 8(1). https://doi.org/10.1186/s40538-020-00199-z
- Genaly, T. S., Nurhayati, Rahayu, M. S. 2022. Effect of Paclobutrazol on the Growth of Potato (Solanum tuberosum L.). International Journal of Economic Business Accounting Agriculture Management and Sharia Administration (IJEBAS). 2(6):1224-1235. https://doi.org/10.54443/ijebas.v2i6.510
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- Kristina, N., Gustian, G., Yusniwati, Y., Obel, O., & Khairunnisa, N. (2024). Effect of Concentration and Time of Giving Paclobutrazol on Lumbu Hijau-Garlic Seedling Bulbs. Agrium. 27(1). ISSN 2442-7306
- Kumar, A., Bhuj, B. D., & Dhar, S. (2023). Chemistry of Paclobutrazol (PACLOBUTRAZOL) and its Function in Agriculture: A Review. Adv Crop Sci Tech. 11(5):5. https://doi.org/10.4172/2329-8863.1000574.
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- Mutaqin, Z., Saputra, H., & Ahyuni, D. (2019). Response of Sweet Corn Growth and Production by Giving Potassium Fertilizer and Husk. Jurnal Planta simbiosa, 1(1), 39–50. https://doi.org/10.25181/jplantasimbio-sa.v1i1.1262.
- Salisbury, F. B., & Ross, C. W. (1995). Plant Physiology Volume I. Indonesia: Institut Teknologi Bandung.
- Swetha, P., Solanki, D., Kumari, S., & Savalia, S. G. (2017). Effect of potassium and sulfur levels on yield and yield attributes of popcorn (Zea mays var. everta). Int J Curr Microbiol Appl Sci. 6(8): 646-655. http://dx.doi.org/10.20546/ijcmas.2016.501.082.
- Syafrizal, S., Wahyuningsih, G.I., Ulfah, F., Pratama, A.B., Adileksana, C. 2024. Paclobutrazol application effects on green leaf index, morphology, and productivity of maize (Zea mays). wakj 1413: 012021. https://doi.org/10.1088/1755-1315/1413/1/012021.
- Tajuddin, S. A. M., Rahman, J. A., Rahum, N. H. A, Mohamed, R. M. R, & Algheethi, A. A. S. A. (2018). Influence of Potassium on Sapric Peat under Different Environmental Conditions. IOP Conf. Ser: Earth Environ. Sci. 140: 012073. https://doi.org/10.1088/1755-1315/140/1/012073.
- Tesfahun, W., & Menzir, A. (2018). Effect of rates and time of paclobutrazol application on growth, lodging, yield and yield components of Tef [Eragrostis Tef (Zucc.) Trotter] in Ada district, East Shewa, Ethiopia. Journal of Biology, Agriculture and Healthcare. 8(3): 104–117. ISSN 2225-093X.
- Tesfahun, W. (2018). A review on: Response of crops to paclobutrazol application. Cogent Food & Agriculture. (4): 1525169. doi: https://doi.org/10.1080/23311932.2018.1525169.
- Utami, D., Kawahata, A., Sugawara, M., Jog, R. N., Miwa, K., & Morikawa, M. (2018). Effect of exogenous general plant growth regulators on the growth of the Duckweed
- Lemna minor. Front Chem. 6: 251. https://doi.org/10.3389/fchem.2018.00251.
- Utomo, M., Sudarsono, B., Rusman, T., Sabrina, & Lumbanraja, J. (2015). Ilmu Tanah (Dasar-dasar dan Pengelolaannya). Prenadamedia. Jakarta. 433 hal.
- Widiawati, D. P., Hatta, M., Hozin, A., Dadan, P., et al. (2024). Peatlands management for sustainable use on the integration of maize and cattle in a circular agriculture system in West Kalimantan, Indonesia. Heliyon. (10): 1-14. https://doi.org/10.1016/j.heliyon.2024.e31259.
References
Armanto, M. E., Widayana, E., & Syakina, B. (2025). Emphasizing Local Wisdom in Peatland Restoration in South Sumatra, Indonesia. Pol. J. Environ. Stud. 34(2): 1017-1025. https://doi.org/10.15244/pjoes/187124.
Biswas, S., Saha, A., & Debnath, S. (2023). Effect of Potassium Level on Growth, Yield, Nutrient Uptake, and Economics of Hybrid Maize. Environment and Ecology. 41. 2155-2159. 10.60151/envec/PVAS3711.
Brar, M. S., Sharma, P., Singh, A., & Sandhu, S. S. (2012). Nitrogen use efficiency (NUE), growth, yield parameters, and yield of Maize (Zea mays L.) as affected by K application. Electron. Int. Fert. Correspondent. 30:3-6.
Desta, B., Amare, G. 2021. Paclobutrazol as a plant growth regulator. Chem. Biol. Technol. Agric. 8(1). https://doi.org/10.1186/s40538-020-00199-z
Genaly, T. S., Nurhayati, Rahayu, M. S. 2022. Effect of Paclobutrazol on the Growth of Potato (Solanum tuberosum L.). International Journal of Economic Business Accounting Agriculture Management and Sharia Administration (IJEBAS). 2(6):1224-1235. https://doi.org/10.54443/ijebas.v2i6.510
Gianfagna, T. J. 1987. Natural and Synthetic Growth Regulations and Their Use in Horticultural Agronomic Crops In Davies,
P.J. (ed). Plant Hormones and Their Role in Growth and Development. Dodrecht. Martinua Nijhoff Publisher. pp 614-632
Ichsan, C. N., Salsabila, Y. A., Mayani, N., Kurniawan, T., & Santi, I.V. (2024). Application of soil amendments and paclobutrazol to shorten internodes and increase rice yields. IOP Conference Series: Earth and Environmental Science. 1297 012016. https://doi.org/10.1088/1755-1315/1297/1/012016.
Kamran, M., Ahmad, S., Ahmad, I., Hussain, I., Meng, X., Zhang, X., Javed, T., Ullah, M., Ding, R., Xu, P., et al. (2020). Paclobutrazol Application Favors Yield Improvement of Maize Under Semiarid Regions by Delaying Leaf Senescence and Regulating Photosynthetic Capacity and Antioxidant System During Grain-Filling Stage. Agronomy. 10(2):187. https://doi.org/10.3390/agronomy10020187.
Kristina, N., Gustian, G., Yusniwati, Y., Obel, O., & Khairunnisa, N. (2024). Effect of Concentration and Time of Giving Paclobutrazol on Lumbu Hijau-Garlic Seedling Bulbs. Agrium. 27(1). ISSN 2442-7306
Kumar, A., Bhuj, B. D., & Dhar, S. (2023). Chemistry of Paclobutrazol (PACLOBUTRAZOL) and its Function in Agriculture: A Review. Adv Crop Sci Tech. 11(5):5. https://doi.org/10.4172/2329-8863.1000574.
Lestari, S., Winarno, B., Premono, B. T., Syabana, T. A. A., Azwar, F., Sakuntaladewi, N., Mendham, D., & Jalilov, S. (2021). Opportunities and challenges for land use-based peatland restoration in Kayu Labu Village, South Sumatra, Indonesia. IOP Conf. Ser.: Earth Environ. Sci. 917:012021. https://doi.org/10.1088/1755-1315/917/1/012021.
Lienargo, B.R., Runtunuwu, S.D., Rogi, J.E., & Tumewu, P. 2014. Effect of Spraying Time and Paclobutrazol (PACLOBUTRAZOL) Concentration on Growth and Production of Maize (Zea mays L.) Variety of Manado Kuning. Cocos. 4(1):1-9. https://doi.org/10.35791/cocos.v4i1.3485.
Maulidi, M., Warganda. W., Darussalam, D., & Pangestu, A. R. (2024). Effect of paclobutrazol concentration in various planting systems on the growth and yield of sweet corn on peat soil in Rasau Jaya 2 Village. Jurnal Pertanian Agros. 26(1):4544–4552.
Mubarok, S., Wicaksono, F. Y., Nuraini, A., Rahmat, B. P. N, & Budiarto, R. (2022). Short Communication: Agronomical characteristics of sweet corn under different plant growth regulators during the dry season. Biodiversitas. 22(6): 3091-3098. https://doi.org/10.13057/biodiv/d230636.
Mutaqin, Z., Saputra, H., & Ahyuni, D. (2019). Response of Sweet Corn Growth and Production by Giving Potassium Fertilizer and Husk. Jurnal Planta simbiosa, 1(1), 39–50. https://doi.org/10.25181/jplantasimbio-sa.v1i1.1262.
Salisbury, F. B., & Ross, C. W. (1995). Plant Physiology Volume I. Indonesia: Institut Teknologi Bandung.
Swetha, P., Solanki, D., Kumari, S., & Savalia, S. G. (2017). Effect of potassium and sulfur levels on yield and yield attributes of popcorn (Zea mays var. everta). Int J Curr Microbiol Appl Sci. 6(8): 646-655. http://dx.doi.org/10.20546/ijcmas.2016.501.082.
Syafrizal, S., Wahyuningsih, G.I., Ulfah, F., Pratama, A.B., Adileksana, C. 2024. Paclobutrazol application effects on green leaf index, morphology, and productivity of maize (Zea mays). wakj 1413: 012021. https://doi.org/10.1088/1755-1315/1413/1/012021.
Tajuddin, S. A. M., Rahman, J. A., Rahum, N. H. A, Mohamed, R. M. R, & Algheethi, A. A. S. A. (2018). Influence of Potassium on Sapric Peat under Different Environmental Conditions. IOP Conf. Ser: Earth Environ. Sci. 140: 012073. https://doi.org/10.1088/1755-1315/140/1/012073.
Tesfahun, W., & Menzir, A. (2018). Effect of rates and time of paclobutrazol application on growth, lodging, yield and yield components of Tef [Eragrostis Tef (Zucc.) Trotter] in Ada district, East Shewa, Ethiopia. Journal of Biology, Agriculture and Healthcare. 8(3): 104–117. ISSN 2225-093X.
Tesfahun, W. (2018). A review on: Response of crops to paclobutrazol application. Cogent Food & Agriculture. (4): 1525169. doi: https://doi.org/10.1080/23311932.2018.1525169.
Utami, D., Kawahata, A., Sugawara, M., Jog, R. N., Miwa, K., & Morikawa, M. (2018). Effect of exogenous general plant growth regulators on the growth of the Duckweed
Lemna minor. Front Chem. 6: 251. https://doi.org/10.3389/fchem.2018.00251.
Utomo, M., Sudarsono, B., Rusman, T., Sabrina, & Lumbanraja, J. (2015). Ilmu Tanah (Dasar-dasar dan Pengelolaannya). Prenadamedia. Jakarta. 433 hal.
Widiawati, D. P., Hatta, M., Hozin, A., Dadan, P., et al. (2024). Peatlands management for sustainable use on the integration of maize and cattle in a circular agriculture system in West Kalimantan, Indonesia. Heliyon. (10): 1-14. https://doi.org/10.1016/j.heliyon.2024.e31259.