Relative efficiency of replicated and non-replicated statistical designs in quantifying the variations in maize grain yield
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2021
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Abstrakt
Two-year field experiment was conducted at the Agricultural Research Station, Faculty
of Agriculture, Alexandria University, Egypt, during the two successive summer seasons of 2018
and 2019. The main aim was to evaluate the relative efficiency of two groups of experimental
designs in quantifying the variations in maize grain yield as influenced by sowing date (SD), plant
density (PD) and phosphorous (P) fertilization, and their interactions. The single hybrid Giza 168
maize (Zea mays, L.) cultivar was used during both seasons. The experimental designs under
evaluation included replicated (RCBD, SPD, SSPD and 3-DLD), in three replications, and nonreplicated (one-rep without and with center points, RCCD and PRCCD) designs. The 3-DLD
design was more efficient, within the replicated group, than the RCBD (reference design) with
relative efficiency of 3.68. The SPD and SSPD had higher relative efficiencies at the sub-plot and
sub sub-plot levels compared to RCBD. Within the non-replicated designs, the one-rep with center
points, RCCD and PRCCD were more efficient than one-rep without center points (reference
design) in discriminating the more important factors affecting grain yield in maize cultivar Giza 168.
Kirjeldus
Received: June 9th, 2021 ; Accepted: July 11th, 2021 ; Published: August 2nd, 2021 ; Correspondence: dralinawar@alexu.edu.eg
Märksõnad
analysis of variance, experimental designs, experimental error, field replications, statistical relative efficiency, articles