Nitrogen Fertilizer Use Efficiency of Irradiated Mutant Rice

DOI

10.2991/absr.k.220102.017How to use a DOI?

Keywords

Nitrogen use efficiency; Isotope stable 15N; Lowland rice; Rice mutant; Sidenuk variety

Abstract

The carrying capacity of rice plants to meet national food demand is inseparable from effective and efficient cultivation techniques. The need of rice plants for fertilizer is a recurring problem, due to the farmers’ tendency to apply fertilizer, especially urea, at the excessive doses. Balanced fertilizer practice is currently a trend encouraged by the government, because the lands that receive intensive chemical fertilization rate decreased in its fertility and health. It is indicated by the low soil acidity value (tends to be acidic to acidic) and the low soil organic carbon (SOC) content (<1%). This case happens in most areas of intensive rice cultivation in Indonesia. The principle of balanced fertilization is to provide a number of nutrients in accordance with the amount of plant needs. Determining the nutrients needed by plants can be done in several ways, including by knowing the efficiency level of plants in utilizing the nutrients that are given or added to the soil. The research objective was to determine the fertilizer dosage with the optimum efficiency level for lowland rice plants. The experiment was carried out in the rice fields of Muara Experimental Station, Bogor, using Batan’s mutant rice variety and mutant line, and national rice variety as a comparison. Randomized Complete Block Design in factorial pattern was using in the experiment. As the first factor is rice variety, consisting of 3 levels factors: 1). Sidenuk mutant rice; 2). mutant line rice; and 3). Ciherang national rice variety. While the dose of urea as second factor consists of 4 levels: 1). no urea fertilizer; 2). urea at a dose of 100 kg N / ha; 3). urea at a dose of 200 kg N / ha; and 4). urea at a dose of 300 kg N / ha. Stable isotope techniques ¹⁵N is used to determine the efficiency of nitrogen uptake by rice plants. The results showed that the highest nitrogen use efficiency of rice varieties owned by Sidenuk amounted to 22.76%; Ciherang variety was 22.30%; and the mutant lines were 17.19%. This efficiency was obtained from the application of urea fertilizer at a dose of 100 kg N / ha (Sidenuk and Ciherang) and 200 kg N / ha (mutant lines).

Copyright

© 2022 The Authors. Published by Atlantis Press International B.V.

Open Access

This is an open access article under the CC BY-NC license.

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TY  - CONF
AU  - Ania Citraresmini
AU  - M. Hanani
AU  - N. Robifahmi
AU  - I. Milyardi
AU  - T. Bachtiar
AU  - N.A. Flatian
PY  - 2022
DA  - 2022/01/07
TI  - Nitrogen Fertilizer Use Efficiency of Irradiated Mutant Rice
BT  - Proceedings of the  International Conference on Tropical Agrifood, Feed and Fuel (ICTAFF 2021)
PB  - Atlantis Press
SP  - 103
EP  - 112
SN  - 2468-5747
UR  - https://doi.org/10.2991/absr.k.220102.017
DO  - 10.2991/absr.k.220102.017
ID  - Citraresmini2022
ER  -