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Comparison of rotations in which barley for grain follows woollypod vetch or forage barley

Published online by Cambridge University Press:  27 March 2009

I. Papastylianou  and
Th. Samios
I. Papastylianou
Affiliation:
Agricultural Research Institute, Nicosia, Cyprus
Th. Samios
Affiliation:
Agricultural Research Institute, Nicosia, Cyprus
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Summary

Using data from rotation studies in which barley or woollypod vetch were included, both cut for hay and preceding barley for grain, it is shown that forage barley gave higher dry-matter yield than woollypod vetch (3·74 v. 2·92 t/ha per year). However, the latter gave feedingstuff of higher nitrogen concentration and yield (86 kg N/ha per year for vetch v. 55 kg N/ha per year for barley). Rainfall was an important factor in controlling the yield of the two forages and the comparison between them in different years and sites. Barley following woollypod vetch gave higher grain yield than when following forage barley (2·36 v. 1·91 t/ha). Rotation sequences which included woollypod vetch had higher output of nitrogen (N) than input of fertilizer N with a positive value of 44–60 kg N/ha per year. In rotations where forage barley was followed by barley for grain the N balance between output and input was 5–6 kg N/ha. Total soil N was similar in the different rotations at the end of a 7-year period.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 108 , Issue 3 , June 1987 , pp. 609 - 615
Copyright
Copyright © Cambridge University Press 1987

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