Effect of Age of Seedlings on the Yield and Agronomic Characters of Rice Varieties Differing in Maturity Periods

Date

3-1979

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

Adviser/Committee Chair

Nestor R. Lawas

Abstract

An experiment was conducted to study individual and combined effects of rice varieties varying immaturity (IR-36, early maturity; C166-33, medium maturity; and IR-24 late maturity) and age of seedling and transplanting (7, 14, 21, 28, 35 and 42 days) on yield and other agronomic characteristics.

Seedling maturity at 5 DAT did not vary greatly with respect to variety and seedling age. However, increasing seedling age extended the number of days to panicle emergence and heading.

The test varieties did not vary significantly on grain yield, harvest index and panicle length. However, IR-36 had the highest tiller production and number of panicles but with the greatest proportion of unfilled grains. C166-133 was the tallest had also the heaviest grains.

Varying transplanting age did not affect yield and other components except for gain weight and number of filled grains. 14-21 day old seedlings had initially better growth. Prolonging seedling are resulted initially to shorter plants, reduction in tillers and dry matter yield.

Interaction between variety and transplanting age was significant only for panicle, grain weights and number of proportion of filled grains. It was concluded that the optimum transplanting age for wetbed seedlings is at 14 - 21 days regardless of variety. Yield performance wise, the medium and late maturing varieties have higher potentials although IR-36 because of shorter growing period could be practical choice.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

This document is currently not available here.

Share

COinS