Effect of  Nitrogen Fertilizer Dosage and Seedlings Age on the Yield and Use of Solar Energy in Glutinous Rice (Oryza sativa glutinous L.)

Sunawan¹, Yogi Sugito², Eko Widaryanto² and Titik Islami²  

¹Department of Agronomy, University of Brawijaya, University of Islam Malang, Indonesia.

²Department of Agronomy, University of Brawijaya, Malang, Indonesia.

Corresponding Author E-mail: laurensiusl@yahoo.co.id

DOI : http://dx.doi.org/10.13005/bbra/2649

ABSTRACT: Glutinous rice (Oryza sativa glutinous L.) is one of the most important types of rice for food and health industries. However, the productivity is still low because the cultivation system has not been done optimally. This is also because the research on glutinous rice cultivation is still very small. The objective of this experiment is to get the N fertilizer dosage and seedlings age that can increase the growth and yield as well as the efficiency of solar energy through increased efficiency of absorbed energy use. The treatment consisted of four levels of nitrogen fertilizer dose (D₁ = 45 kg ha^-1, D₂ = 90 kg ha^-1, D₃ = 135 kg ha^-1 and D₄ = 180 kg ha^-1) and three levels of seedlings age (U₁ = 14 days, U₂ = 21 days and U₃ = 28 days). This treatment combination was arranged in a Split Plot Design with three replications, N fertilizer dosage as the main plot and seedlings age as the subplot. The results showed that the N fertilizer dosage used in this experiment had a significant effect on dry weight, the number of tillers, yields, absorbed use efficiency (AUE) and Energy Conversion Efficiency (ECE). Seedlings age did not give a significant effect on the number of productive tillers and grain yields. The highest grain yield was achieved by treatment of N 180 kg ha^-1 fertilizer dose of 9.86 t ha^-1 with AUE value of 2.83% and ECE 4.84%.

KEYWORDS: Efficiency of Solar Energy Usage and Energy Conversion Glutinous Rice; Nitrogen Fertilizer; Seedlings Age; Solar Energy;

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