Effect of Spacing and Weed Control on Yield and Agronomic Characters of Delayed Transplanted Rice

Date

9-1979

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Basilio B. Mabbayad

Co-adviser

Ramon A. Oliveros

Abstract

An experiment was conducted to determine the effect of weeding, spacing, age of seeding and their interactions on yield and agronomic performance of UPL Ri-2 (Intan x Bengawan).

Weeding showed a marked effect on the parameters investigated with a yield increase of 1.114 tons per hectare.

Spacing significantly affected all parameters except HI and 100 grain weight. Higher LAI and grain yield was obtained at 40x 15 cm spacing. However, taller plants and higher number of tillers and panicles were obtained at 20 x 20 cm spacing. Values obtained for other spacings (30 x13.3 cm and 15 x 15 cm.) did not show significant differences.

Age seedling had likewise affected significantly all parameters except for number of panicles per hill. Twenty day-old seedlings performed better though 40 day-old seedlings had heavier 100 grain weight.

Tiller counts and number of panicles per hill were significantly affected by weeding, spacing and age interactions. On the other hand, % unfilled grain was significantly affected by spacing and age interactions and interaction of three factors investigated, HI, LAI and grain yield were significantly affected by spacing and age interaction.

Weed density and weed weight were significantly higher at 20 x 20 cm spacing than 40 x 5 cm spacing. Age of seedlings failed to show significant effect on weed density and weed weight. No significant effect of age and spacing interactions were obtained for weed density and weight at 20 and 40 DAT.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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