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A Pear and Vegetable Interculture System: Land Equivalent Ratio, Light Use Efficiency and Productivity

Published online by Cambridge University Press:  03 October 2008

S. M. Newman
S. M. Newman
Affiliation:
Applied Biosystems Unit, Energy Research Group, Open University, Milton Keynes, England
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Summary

The productivity, land equivalent ratios (LERs) and light use efficiency of a pear and radish interculture system were assessed. Pear yield was unaffected by intercropping. Relative yields for the radish component varied between 0.5–1.01 depending upon the yield index and spatial arrangement employed. This gave LER values for the system of 1.5–2.01. The overall trans-missivity of the pear canopy was 73%. A 47% reduction in photosynthetically active radiation (PAR) gave a yield reduction of 65% in terms of number of saleable radish, but did not affect total dry matter productivity. Reductions in radish yield directly beneath pear trees was thought to be due to other factors besides PAR. The total dry matter productivity of a system containing five successive radish crops was estimated at 26.25 tonnes ha−1 yr−1.

Type
Research Article
Information
Experimental Agriculture , Volume 22 , Issue 4 , October 1986 , pp. 383 - 392
Copyright
Copyright © Cambridge University Press 1986

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References

REFERENCES

Corley, R. H. V. (1983). Potential productivity of perennial crops. Experimental Agriculture 19:217–237.CrossRefGoogle Scholar
Fekete, E. B. (1958). A study of horticultural holdings in the Vale of Evesham. MSc thesis, University of Bristol.Google Scholar
Huxley, P. A. (1982). Agroforestry – a range of new opportunities? Biologist 29:141–143.Google Scholar
Jackson, J. E. (1980). Light interception and utilisation in orchard systems. In Horticultural Reviews: 2 (Ed. Janick, J.). Connecticut: AVI.Google Scholar
Kass, D. C. L. (1978). Polyculture cropping systems. Review and analysis. Cornell International Agriculture Bulletin 32. New York.Google Scholar
Newman, S. M. (1983). The design and testing of a system for monitoring the availability of solar radiation for interculture. Agroforestry Systems 2:43–47.CrossRefGoogle Scholar
Newman, S. M. (1984). The use of vegetable phytometers in the evaluation of the potential response of understorey crops in the aerial environment in an interculture system. Agroforestry Systems 2:49–56.Google Scholar
Newman, S. M. (1985). Low cost sensor integrators for measuring the transmissivity of complex canopies to photosynthetically active radiation. Agricultural and Forest Meteorology 35:243–254.CrossRefGoogle Scholar
Pappendick, R. I., Sanchez, P. A. & Triplett, G. B. (1976). Multiple Cropping. ASA Special Publication 27. Wisconsin: ASA.Google Scholar
Purseglove, J. W. (1974). Tropical Crops: Dicotyledons and Monocotyledons. London: Longman.Google Scholar
Ramanujam, S. & Baldev, B. (1980). Legumes in intercropping systems. Proceedings of a National Symposium held at the Indian Agricultural Institute, New Delhi, July 1978. Indian Journal of Genetics 40(A):1–178.Google Scholar
Ruthenburg, H. (1971). Farming Systems in the Tropics. Oxford: OUP.Google Scholar
Tikhomirov, A. A. (1976). Effects of light regime on productivity and quality of the harvest of radish. Soviety Plant Physiology 23:427–431.Google Scholar
Villareal, R. & Lai, S. H. (1977). Developing vegetable varieties for intensive cropping systems. In Proceedings, Symposium on Cropping Systems Development and Research for the Asian Rice Farmer, 373–393. Philippines: IRRI.Google Scholar
Watson, G. A. (1983). Development of mixed tree and food crop systems in the humid tropics: A response to population pressure and de-forestation. Experimental Agriculture 19:311–332.CrossRefGoogle Scholar
Willey, R. W. (1979). Intercropping – its importance and research needs. Field Crop Abstracts 32(1): 1–10 and 32(2):73–85.Google Scholar