Si-Humate as soil ameliorant to improve the properties of acid sulfate soil, growth, and rice yield

• Autores: Eni Maftu’ah, Muhammad Saleh, Yiyi Sulaeman, Khairatun Napisah, Rusmila Agustina, Mukhlis Mukhlis, Khairil Anwar, Rina Dirgahayu Ningsih, Masganti Masganti, Puspita Harum Maharani, Syaiful Asikin, Vicca Karolinoerita, Nur Wakhid, Afiah Hayati, Yuli Lestari
• Localización: Agricultura técnica = Chilean Journal of Agricultural Research, ISSN-e 0718-5839, ISSN 0365-2807, Vol. 84, Nº. 2, 2024, págs. 267-280
• Idioma: inglés
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  • ABSTRACT Soil ameliorants play a crucial role in enhancing soil fertility and rice (Oryza sativa L.) production in acid-sulfate soils. This research aims to study the impact of Si-humic ameliorants on soil chemical properties, plant growth, Fe levels, and rice production in acid-sulfate soil. The experiments were conducted at the Laboratory and Greenhouse of the Indonesia Swampland Agricultural Research Institute. The greenhouse experiment adopted a factorial RCBD with Factor 1 representing the ameliorant formula type: 100% lime (F0), 30% commercial humate+30% rice husk ash+40% lime (F1), 30% water hyacinth humate+0% rice husk ash+40% lime (F2), 30% water hyacinth humate+30% rice husk biochar+40% lime (F3), 30% commercial humate+30% rice husk biochar+40% lime (F4), and control without ameliorant. Factor 2 represents dosage of soil ameliorant: 0, 1, 2, and 4 t ha-1. Observations included soil properties such as pH, exchangeable Fe, available P, plant growth, Fe toxicity, yield, and yield components. Silicon-humic soil ameliorant demonstrated the ability to enhance soil pH from 3.16 to 3.63, available P from 6.12 to 30.16 mg kg-1, and decrease Fe 690 to 371 mg kg-1. Specifically, the F3 Si-humate formulation alleviated Fe toxicity, enhanced P availability, promoted rice growth, and improved yield. The application of 4 t ha-1 Si-humate F3 had the best effect in increasing grain yield by 4.22 g pot-1 compared to the control. The application of Si-humate F3 not only improved soil quality and increased rice yields but also reduced the need for lime, contributing to the potential maintenance of soil health.