Soil and plant-based approaches in formulating fertilizer recommendations for rice (Oryza sativa L.) in the province of Iloilo, Philippines

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Author: Gabinete, Greta Gallo

Accession Number: 1328D

Class No:

Author No: G.

Copyright Year: 2006

Abstract:

On-farm experiments were conducted in the province of Iloilo, Philippines to identify a nutrient management approach that could adequately meet the nutrient needs of rice crop. The experiment assessed soils nutrient supplying capacity using routine soil analysis and the nutrient omission plot technique. The relationships between grain yield, nutrient uptake and soil test value were examined and established. Soil and plant-based nutrient management recommendations for the wet and dry seasons were formulated and evaluated. The total organic C, extractable Olsen P and 1 M ammonium acetate K were no highly correlated with grain yield was highly related to the plant nutrient accumulations in nutrient ommision plots. Generally, SSNM-based fertilizer recommendations have higher fertilizer rates than the soil test-based fertilizer recommendations. the SSNM with improved seed rate (100-120 kg ha-1)significantly yielded almost 1.0 t ha-1 higher than farmers' practice. The yield difference between SSNM with improved seed rate (110-200 kg. ha-1) was 0.7 t ha-1. The SSNM recommendation developed for Iloilo rice farmers showed significantly greater yield gain when combined with an improved seed rate.


Keywords: Soil, plant-based approaches, fertilizer, rice (Oryza sativa L.)

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