Germination response of selected weed species seeds to various scarification and chemical treatments

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

Germination of different weed species in response to different chemical and physical treatments was examined. Dormancy was evaluated through germination tests and viability tests of Amaranthus spinosus, Amaranthus viridis, Celosia argentea, Portulaca oleracea and Eleusine indica pretreated with different concentrations of ethanol, sulfuric acid, hydrochloric acid, gibberellic acid, different water treatments and mechanical scarification. Germination percentage, number of days to first germination, mortality rate, presence dormancy and germination index were taken. Amaranthus spinosus seeds responded well to 10 and 30% ethanol. Ethanol was not suitable for Amaranthus viridis, Portulaca oleracea, Celosia argentea and Eleusine indica. Soaking in water for 24 hours was not suitable for Eleusine indica but work with the rest of the species. Sulfuric and hydrochloric acids were harmful to Amaranthus viridis and Portulaca oleracea but stimulate germination in Amaranthus spinosus, Celosia argentea and Eleusine indica. Gibberellic acid at 50-2,000 ppm can be tolerated by Portulaca oleracea, Celosia argentea and Eleusine indica but lower concentrations are suitable for Amaranthus spinosus and Amaranthus viridis. The species showed varying response to abrasion by mechanical scarification. an observed differences in response of the species to some treatments which might be due to morphological variation within species. Ecotypic differences may have some effect on seed characteristics ? their morphology and physiology. This warrants further study.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2016 A3 /F33

Document Type

Thesis

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