Effects of Soil Type, Irrigation Method, and Biomass Application on Grain Yield and Its Determinants in Irrigated Lowland Rice of Agusan [RESEARCH NOTE]

Authors

Jehru C. Magahud, DA-PhilRice Agusan, Remedios T. Romualdez, 8611 Agusan del Norte, PhilippinesFollow

Publication Date

9-1-2024

Abstract

Information about the influence of soil type, irrigation method, and biomass use on rice productivity in Agusan is insufficient, despite their importance in developing or improving irrigated lowland rice production. Hence, this study determined the influence of these factors on grain yield and yield-contributing crop traits. It also explained grain yield based on yield determinants and recommended water management for improving grain yield. The greenhouse experiment was laid out in a three-factor randomized complete block design with 10 replications. The treatments were [a] Butuan sandy loam soil (SLS) and Butuan loam soil (LS); [b] continuously flooded (CF) and controlled irrigation (CI); and [c] applied and unapplied biomass. Data on grain yield and yield determinants were gathered weekly, during harvesting, and after harvesting. Relative to LS, SLS had a statistically greater grain output owing to its higher root and water permeability and better balance among soil nutrients, leading to closer-to-the-optimum soil nutrient uptakes and better yield-contributing crop traits. Compared with CI, CF had a statistically superior grain output as it induced the crop to produce more robust tillers, leading to significantly better yield-contributing crop characteristics. Biomass application modified the soil type x irrigation method interaction since the degree at which CF was exhibiting higher grain yield than CI was significantly greater in SLS than LS for experimental units or pots applied with biomass. Moreover, the level at which CF was attaining greater grain yield than CI was statistically similar in SLS and LS for pots unapplied with biomass. It is therefore recommended that rice be grown in Butuan sandy loam instead of Butuan loam, and that CF instead of CI be used in soil with a mild zinc deficiency or sufficient zinc status.

Recommended Citation

Magahud, Jehru C. (2024) "Effects of Soil Type, Irrigation Method, and Biomass Application on Grain Yield and Its Determinants in Irrigated Lowland Rice of Agusan [RESEARCH NOTE]," The Philippine Agricultural Scientist: Vol. 107: No. 3, Article 9.
Available at: https://www.ukdr.uplb.edu.ph/pas/vol107/iss3/9