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Edge effects on yield, yield components and other physiological characteristics in cereals and oilseed crops

Published online by Cambridge University Press:  27 March 2009

A. Hadjichristodoulou
A. Hadjichristodoulou
Affiliation:
Agricultural Research Institute, Nicosia, Cyprus
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Summary

The edge effect (calculated as the mean of the two outer rows as a percentage of the mean of the four central rows of 6-row plots) was measured in ten comparative trials conducted in Cyprus during 1987–90, with two cultivars each of rapeseed, safflower and sunflower, and one cultivar each of barley and durum wheat. Grain, straw and total biological yields obtained from the outer rows were usually higher than those obtained from the central rows by 1–384%. In one trial with sunflower, the grain yield of the outer rows was only 64% of that of the central rows, which could not be explained, considering all the other data. Differences in edge effects between species and trials were significant. Grain yield estimated from the central rows was on average 53% of that estimated from whole plots, and this varied with species and season. Therefore, in comparative trials, the outer rows should be removed before harvesting. There was no significant edge effect on the oil content of the oilseed crops. Edge effects on harvest index, volume weight, 1000-grain weight and nitrogen content were generally smaller than those on yield, and on average ranged from 100 to 113, thus the values computed from the outer rows were only 0–13% higher than from the central rows.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 120 , Issue 1 , February 1993 , pp. 7 - 12
Copyright
Copyright © Cambridge University Press 1993

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References

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