Application of humic acid supplemented with micronutrient increase rice production

Valdi Muhamad Rafiansyah Siregar; Soekarno Mismana Putra; Muhammad Abdul Aziz; Hana Fadila; Poppy Arisandy; Sri Wahyuni; Priyono; Insyiah Meida Luktyansyah; Sulastri; Rizky Nugraha; Mira Maulidina; Siswanto

doi:10.24831/jai.v51i3.46904

Valdi Muhamad Rafiansyah Siregar Indonesia Oil Palm Research Institute, Jl. Taman Kencana No.1, Bogor 16128, West Java, INDONESIA
Soekarno Mismana Putra Indonesia Oil Palm Research Institute, Jl. Taman Kencana No.1, Bogor 16128, West Java, INDONESIA
Muhammad Abdul Aziz Indonesia Oil Palm Research Institute, Jl. Taman Kencana No.1, Bogor 16128, West Java, INDONESIA
Hana Fadila Indonesia Oil Palm Research Institute, Jl. Taman Kencana No.1, Bogor 16128, West Java, INDONESIA
Poppy Arisandy Indonesia Oil Palm Research Institute, Jl. Taman Kencana No.1, Bogor 16128, West Java, INDONESIA
Sri Wahyuni Indonesia Oil Palm Research Institute, Jl. Taman Kencana No.1, Bogor 16128, West Java, INDONESIA
Priyono Indonesia Oil Palm Research Institute, Jl. Taman Kencana No.1, Bogor 16128, West Java, INDONESIA
Insyiah Meida Luktyansyah PT Pupuk Kalimantan Timur, Jl. James Simandjuntak No.1, Bontang 75313, East Kalimantan, INDONESIA
Sulastri PT Pupuk Kalimantan Timur, Jl. James Simandjuntak No.1, Bontang 75313, East Kalimantan, INDONESIA
Rizky Nugraha Indonesia Oil Palm Research Institute, Jl. Taman Kencana No.1, Bogor 16128, West Java, INDONESIA
Mira Maulidina Indonesia Oil Palm Research Institute, Jl. Taman Kencana No.1, Bogor 16128, West Java, INDONESIA
Siswanto Indonesia Oil Palm Research Institute, Jl. Taman Kencana No.1, Bogor 16128, West Java, INDONESIA

DOI: https://doi.org/10.24831/jai.v51i3.46904

Abstract

Fertilizer is one of the crucial inputs to maximize nutrients needed by plants, especially rice. However, insufficient ameliorant application may affect the fertilizers' effectiveness. Humic acid is believed as one of the ameliorants to improve soil conditions resulting in higher nutrient availability. The study aimed to evaluate the effect of combining humic acid and micronutrients on growth, production, and nutrient contents in rice. Three treatments were applied, i.e., control (without humic acid), humic acid, and humic acid + micronutrients. The result showed that both humic acid treatments produced the highest number of tillers, humic acid application solely stimulated the highest root length, and humic acid + micronutrients stimulated the highest plant height, and fresh and dry biomass weight. Grain weight was not affected by treatments, but humic acid + micronutrients gave a higher weight of milled grain and number of filled grains. Humic acid application solely resulted in plant biomass and grains having higher N, P, and K contents. Overall, the application of humic acid + micronutrients is recommended to increase rice production.

Keywords: ameliorant; fertilizer; nutrient availability; nutrient uptake