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Effects of Temperature, Soil Water Status and Depth of Planting on Germination and Emergence of Maize (Zea Mays) Adapted to Semi-Arid Eastern Kenya

Published online by Cambridge University Press:  03 October 2008

J. K. Itabari
Affiliation:
Department of Soil Science, University of Reading, London Road, Reading, RG1 5AQ, England
P. J. Gregory
Affiliation:
Department of Soil Science, University of Reading, London Road, Reading, RG1 5AQ, England
R. K. Jones
Affiliation:
ACIAR/CSIRO Dryland Project, PO Box 41567, Nairobi, Kenya

Summary

The effects of temperature and soil water potential on maize germination were investigated in controlled environment conditions and the effects of depth of planting and a mulch on maize emergence were studied in a field experiment in eastern Kenya. The rate of germination increased to an optimum temperature of 33.6°C above a base temperature of 6.1°C and decreased above the optimum to zero germination at 42.9°C. The thermal time for median germination increased from 51.5°Cd to 56.4°Cd as soil matric potential decreased from -5 to -40 kPa. Soil water content, depth of planting, and their interaction had significant (P < 0.001) effects on final germination and emergence but mulch, or any interactions involving mulch, had no such effects. Increasing depth of planting by 1 cm increased the thermal time required for emergence by 2.8°Cd, and decreasing water content by 1% increased the thermal time required for emergence by 3.2°Cd.

Germinación y emergencia del maíz

Type
Research Article
Copyright
Copyright © Cambridge University Press 1993

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