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Concentration of N, P and K in leaves, straw and grain of wheat and barley as influenced by N and P fertilizers under semi-arid conditions

Published online by Cambridge University Press:  27 March 2009

P. I. Orphanos  and
V. D. Krentos
P. I. Orphanos
Affiliation:
Agricultural Research Institute, Nicosia, Cyprus
V. D. Krentos
Affiliation:
Agricultural Research Institute, Nicosia, Cyprus
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Summary

The N, P and K contents of leaves, straw and grain of the durum wheat Kyperounda, the aestivum wheat Pitic 62 and Athenais barley under semi-arid conditions (150–400 mm) as influenced by N and P fertilizers are reported (N rates: 0–105 kg/ha; P rates: 0–26 kg/ha).

Fertilizer N increased linearly the N content of the leaves, straw and grain as well as the K content of leaves and straw, but slightly reduced P content of the grain. Straw K content was increased relatively more in Athenais barley. Such increases of N and K content occurred beyond the N rates giving maximum grain and sheaf yields. Increased K content of the straw resulting from fertilizer N is wasteful where the straw is removed, and accelerates depletion of soil K. Durum wheat grain containing more than 2–8% N showed less than 6% yellow berry (mealy grains) but at lower N contents yellow berry could be high or low depending on location.

Fertilizer P did not significantly influence the P content of any of the components analysed even though it increased grain and straw yields, particularly in the drier years.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 94 , Issue 3 , June 1980 , pp. 551 - 556
Copyright
Copyright © Cambridge University Press 1980

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