Effects of drought on modulation and nitrogen fixation of bush sitao

Date

4-1984

Degree

Bachelor of Science in Agriculture

Major Course

Major in Horticulture

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Maria Malixi M. Paje

Abstract

The effects of drought on nodule formation, nitrogen fixation and some physiological characteristic of four bush sitao cultivars in relation to yield were investigated under greenhouse condition.

Drought significantly reduced nodulation, nitrogen fixation, leaf nitrogen content and yield of bush sitao. Root shoot ratio was increased due to an increase in root length and root mass which is a crop adaptation to overcome water deficits. Nodule formation and nitrogen fixing ability was reduced by 49.78% and 61.29%, respectively.

Water deficits also caused the decrease in pod set, number of pods (39.56%) and pod weight (47.37%). Stress rating was highest for UPBS-4 which was the cultivar most affected by drought in most of the parameters used.

UPBS-1 possessed drought resistance characteristic while UPBS-3 and UPBS-7 had a moderate drought resistance; UPBS-4 was the most drought susceptible.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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