Thesis
Phenotypic responses to irrigation and extrusion proprieties of proso millet (Panicum miliaceum L.) for cultivation in the Pacific Northwest, U.S.A.
Washington State University
Master of Science (MS), Washington State University
2016
Handle:
https://hdl.handle.net/2376/101153
Abstract
Proso millet (Panicum miliaceum L.), a warm season crop, is among the oldest cultivated grains. It has been grown in many countries in Asia, Africa and Eastern Europe since 10,000 and 8,700 years before present (BP) and it has been an important staple food to daily survival of millions of people in those parts of the world. However not much research has been conducted on this crop in comparison to other grains. The research objectives presented in this thesis were designed to evaluate the potential of using proso millet in the Pacific Northwest Region of the United States for animal and human consumption. Field-based research was conducted to evaluate phenotypic responses of 20 accessions of proso millet under irrigated and without irrigated treatments. The traits measured in this study were plant emergence, plant height, days to heading, days to maturity, and grain yield. The experimental design was a split-plot randomized complete block design with three replicates. Main plots were irrigated and non-irrigated treatments and sub-plots were twenty accessions of proso millet. Irrigation has shown to significantly improve emergence, plant height, and grain yield across all varieties (p < 0.0001). However, days to heading and maturity were not affected by irrigation across all varieties (p > 0.05). The objective of the second study was to determine the impact of extrusion variables such as moisture (18, 23 and28%w.b.), temperature (130, 140 and150oC) and screw speed (150, 200 and 250 rpm) on physical properties of proso millet extrudates. Moisture and temperature significantly affected proso millet extrusion, primarily radial expansion (p < 0.001). Radial expansion was high at several low moisture conditions in this study; the highest radial expansion was recorded at low temperature (1300C), low moisture content (18%) and high screw speed (250 rpm). However, the direct expansion of this variety of proso millet is still relatively low compared to other commonly used cereal grains such as de-hulled finger millet, corn or wheat. It is not well suited to be used as raw material for making direct expanded products.
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Details
- Title
- Phenotypic responses to irrigation and extrusion proprieties of proso millet (Panicum miliaceum L.) for cultivation in the Pacific Northwest, U.S.A.
- Creators
- Cedric Habiyaremye
- Contributors
- Kevin Murphy (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Crop and Soil Sciences, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525102001842
- Language
- English
- Resource Type
- Thesis