Cost-efficient Fertilizer Management in Lowland Rice Under Limited Water Supply

Keywords

cost-efficient
leaf color chart
farmer's practice
location-specific
growth stage
intermittent flooding
irrigation

How to Cite

Cost-efficient Fertilizer Management in Lowland Rice Under Limited Water Supply. (2012). WVSU Research Journal, 1(2), 16-20. https://doi.org/10.59460/wvsurjvol1iss2pp16-20

Abstract

The efficient utilization of essential rice nutrients, particularly nitrogen, depends on the availability of water. Field experiments were conducted in farmers' fields in Pototan, Iloilo, for two dry seasons, to evaluate the best location-specific fertilizer management strategy suited for irrigated lowland rice under different water regimes. The verification trials were conducted in irrigated rice fields in 2002-2003 dry season at barangays Cahaguikican and Igang, both in Pototan town Province of Iloilo. In 2003-2004 dry season, the test was only conducted in Igang, Pototan. The treatments were laid out in a Randomized Complete Block (RCB) design with four replications using a plot size of 30 square meters.Treatments were tested as to (a) farmer's actual practice, (b) growth stage-based N application (120 kg N/ha, 40 kg P₂O₅ /ha, and 40 kg K₂O/ha), (c) leaf color chart (LCC) - based N application. Results in Cahaguikican, Pototan showed that the LCC-based nitrogen application is suited for the site. In Igang, Pototan, the farmer's fertilizer management practice is cost-efficient under continuously flooded condition. However, if irrigation is done once a week, the LCC-based nitrogen application of fertilizer is recommended.

 

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Copyright (c) 2023 WVSU Research Journal