Response of High-yielding Upland Rice to Fertilization for Intensive Nutrient Production System

Renante D. Taylaran, Elizar M. Elmundo, Apolinario B. Gonzaga, Jr.

Abstract


Nutrient responsive upland rice variety is indispensable in improving yield. Five selected upland rice varieties were evaluated and one of which was grown under different levels of nitrogen fertilization (no fertilization, recommended rate of 120-90-60, 180-90-60, 240-90-60, and 300-90-60 kg ha-1 NPK) at University of Science and Technology of Southern Philippines, Claveria campus in 2014 and 2015, respectively. The study followed a randomized complete block design with three replications. The yield of traditional upland rice “Speaker” revealed the highest among varieties. When applied with varying levels of nitrogen fertilizer, the yield of “Speaker” plateaued at the application of twice the recommended rate. The yield increased by 172% against no fertilization and 60% against the recommended rate when the recommended nitrogen application was doubled. There was a positive correlation between the yield and the total dry matter weight at harvest; and the dry matter weight at harvest and relative chlorophyll content at one week after heading. The significant increased in yield of traditional upland rice “Speaker” from 1.0 to 4.0 t ha-1 indicates its potential to respond positively under the intensive nutrient upland rice production system.

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References


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