Call Prefix : PR-T

Call Suffix : 2025

Call Cutter : T - Agron 68

Location : SEARCA Library

Format : Printed

Publisher : University of the Philippines Los Baños

Publication Date : 2025

Publication Place : College, Laguna

Summary : Rice (Oryza sativa L.) stands as a staple food for over half of the world's population, making its cultivation a cornerstone of global food security. Due to resources scarcity and pursuit of sustainable agricultural practices, most Asian and African farmers are shifting from intensive labor, water, and energy conventional transplanting puddled rice (TPR) to direct seeded rice system (DSR). This method, characterized by the direct sowing of pre-germinated seeds into flooded fields, has gained attention for its potential to enhance resource-use efficiency and mitigate environmental impacts. Although weed infestation is a major challenge in DSR, the duration and efficient resource use in DSR can address the global rice demand. The aim of this study is to better understand the impact of planting methods and density in wet direct seeded rice using NSIC Rc 506 rice variety. Two field experiments were laid out in a Randomized Complete Block Design (RCBD) in Los Baños, Laguna, Philippines with four treatments in each and replicated three times. Plant growth parameters, yield components and grain yield were evaluated and found significantly higher on average in all the direct seeded treatments and the less spacing transplanting treatment (TP2). Phenological events in all the direct seeded treatments were approximately 5% earlier than the transplanting treatments. The grain yield (t/ha-1) under planting methods were significantly higher in the direct seeded treatments, DRN50 (4.86 t/ha-1), BC50 (3.25 t/ha-1) APV50 (3.06 t/ha-1) compared to the conventional manual transplanting treatment (TPl) 1.79 t/ha-1. For planting density, BC120 (3.73 t/ha-1) and BC50 (3.25 t/ha-1) were significantly higher compared to TP2 (2.15 t/ha-1) and TPl (1.79 t/ha-1). This study highlights that growth, yield components and grain yield of NSIC Rc 506 were influenced by planting methods and density.