Sweet corn (Zea mays L. var. saccharata) is a variety of corn that differs from regular corn due to its sweet taste, which is caused by its high sugar content. The productivity of sweet corn in the country is still low compared to other producing countries. The application of humic acid soil conditioner can enhance the absorption of micro and macro elements in plants. Humic acid can also improve plant growth by increasing bioavailability and nutrients through soil environment improvement around the roots. This study aims to determine the effect of humic acid soil conditioner and the appropriate dosage on the growth and yield of sweet corn. The study used a Non-Factorial Randomized Block Design (RBD) with 4 treatment levels: (H0: without humic acid soil conditioner (control), H1: 5 kg/ha, H2: 10 kg/ha, H3: 15 kg/ha). The results showed that the application of humic acid soil conditioner can increase plant height, cob diameter, and cob length of sweet corn. The best dosage of humic acid organic fertilizer for the growth and yield of sweet corn is 15 kg/ha.

Keywords : sweet corn, soil conditioner, humic acid

El-Ghamry, A.M.K.A., El-Hai, & Ghoneem, KM. (2009). Amino and humic acids promote growth, yield and disease resistance of faba bean cultivated in clayey soil. Aust. J. Basic Appl. Sci, 3(2), 731-739.

Hermanto, D.N.K.T, Dharmayani, N.K., Kurnianingsih, R., & Kamali, S.R. (2013). Pengaruh asam humat sebagai pelengkap pupuk terhadap ketersediaan dan pengambilan nutrien pada tanaman jagung di lahan kering Kecamatan Bayan-NTB. Ilmu Pertanian (Agricultural Science) . 16(2): 28-41.

Ihdaryanti, M.A. (2011). Pengaruh asam humat dan cara pemberiannya terhadap pertumbuhan dan produktivitas tanaman padi (Oryza sativa). Institut Pertanian Bogor. Bogor.

Lestari, N.P, & Sukri, M.Z. (2020). Aplikasi asam humat terhadap pertumbuhan dan produksi tanaman jagung manis (Zea mays saccharata Sturt.). Agropross, National Conference Proceedings of Agriculture. Politeknik Negeri Jember.

Meriati. (2019). Pertumbuhan dan hasil jagung manis (Zea mays saccharata) pada pertanian organik. Jurnal Embrio, 11(1), 24-35.

Mylonas, V.A, & McCants, C.B. (1980). Effects of Humic and Fulvic Acids On Growth of Tobacco. 2. tobacco growth and ion uptake. J. Plant Nutr, 2(3), 377-393.

Mutaqin, Z., Saputra, H., Ahyuni, D. (2019). Respon pertumbuhan dan produksi jagung manis terhadap pemberian pupuk kalium dan arang sekam. Jurnal Planta Simbiosa, 1(1), 39-50.

Nuraini, Y., & Zahro, A. (2020). Pengaruh aplikasi asam humat dan pupuk NPK terhadap serapan nitrogen, pertumbuhan tanaman padi di lahan sawah. Jurnal Tanah dan Sumberdaya Lahan, 7(2), 195-200.

Oktaviani, W., Khairani, L., Indriani, N.P. (2020). Pengaruh berbagai varietas jagung manis (Zea mays saccharata Sturt) terhadap tinggi tanaman jumlah daun dan kandungan lignin tanaman jagung. Jurnal Nutrisi Ternak Tropis dan Ilmu Pakan, 2(2), 60-70.

Pettit, R.E. (2018). Organic Matter, Humus, Humate, Humic Acid, Fulvic Acid and Humin: Their Importance In Soil Fertility and Plant Health. https://humates.com/pdf/ORGANIC MATTERPettit.pdf. [diakses 2 Juli 2024].

Sarno, & Eliza, F. (2011). Pengaruh pemberian asam humat dan pupuk N terhadap pertumbuhan dan serapan N pada tanaman bayam. Prosiding SNSMAIP III. 289-293.