Interaction effects of flooding and seed burial on weedy rice (Oryza sp.) seed mortality

Date

6-2016

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Juanito V. Bariuan

Abstract

Weedy rice is hard to manage and use of chemicals may not be effective when associated with rice crops due to similarities of morphological and physiological characteristics so farmers rely on flooding as means of suppressing weeds. Fallow management is a farming practice known for soil moisture conservation and weed management control. Mortality of seeds can be due to germination and decay of seeds. The main goal of this study was to identify appropriate fallow management practices (tillage and flooding) for weedy rice management. Effects of flooding and burial depth were examined in the two accessions per each retrieval time. Weedy rice seed mortality due to decay and seed dormancy has a direct relationship to flooding and burial depth whereas mortality due to germination has an inverse relationship to both. Increase of flooding and burial depth resulted to increase of decayed and dormant seeds and decrease of germinated seeds. Hence, in the absence of flooding and seed burial, weedy rice seeds can result to higher total seed mortality under saturated soil condition.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2016 A3 /B35

Document Type

Thesis

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