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Competition Effects between Leucaena and Maize Grown Simultaneously in an Alley Cropping System in Sub-tropical Australia

Published online by Cambridge University Press:  03 October 2008

K. W. Jeanes ,
R. C. Gutteridge  and
H. M. Shelton
K. W. Jeanes
Affiliation:
Department of Agriculture, University of Queensland, Queensland 4072, Australia
R. C. Gutteridge*
Affiliation:
Department of Agriculture, University of Queensland, Queensland 4072, Australia
H. M. Shelton
Affiliation:
Department of Agriculture, University of Queensland, Queensland 4072, Australia
*
†Author to whom correspondence should be addressed.
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Summary

A field experiment was conducted to assess the effect of competition between a leucaena hybrid and maize (Zea mays L.) when planted simultaneously in an alley cropping system. The leucaena hybrid (a cross between L. diversifolia and L. leucocephala) was planted at hedgerow spacings of 3 and 5.25 m, while maize was planted in rows 75 cm apart between the hedgerows. The spacing between the leucaena hedgerow and maize was varied by removal of 0, l or 2 rows of maize to give three spacing treatments of 37.5, 75 or 112.5 cm between leucaena and maize. A control plot of leucaena alone was also included in the treatments. The growth and yield of individual maize rows were virtually unaffected by the presence of leucaena, but maize had a significant influence on the growth and yield of leucaena. At full maize canopy development, photosynthetically active radiation reaching the leucaena was reduced in all treatments, resulting in a 75% yield reduction in leucaena at the closest spacing. Overall, maize grain yield reached 10.3 t ha−1 in the continuous maize plots (37.5 cm treatment). This was reduced by up to 40% after removal of two maize rows in the closest leucaena row spacing treatment. The implications of these results for the practical establishment of leucaena hedgerows with a maize crop are discussed.

Type
Research Article
Information
Experimental Agriculture , Volume 32 , Issue 1 , January 1996 , pp. 49 - 56
Copyright
Copyright © Cambridge University Press 1996

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References

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