Advertisement

Agroforestry Systems

, Volume 13, Issue 2, pp 143–158 | Cite as

A tree/crop interface design and its use for evaluating the potential of hedgerow intercropping

  • M. R. Rao
  • M. M. Sharma
  • C. K. Ong
Article

Abstract

The paper describes a tree/crop interface (TCI) experiment designed to investigate the effects of row orientation using Leucaena leucocephala Lam. Each TCI plot consisted of a regularly pruned Leucaena hedge in the middle and 12 crop rows on either side. Eight such plots were arranged at 45° around a sole Leucaena plot with rows oriented in four compass directions viz., North-South, East-West, Northeast-Southwest and Northwest-Southeast.

Results of four years from 1984 to 1987 did not show any effect of row orientation, and similarly, no effect was seen on crop rows due to their location on the windward or leeward side of the hedge. The TCI effect was positive on the first crop row in the first year because Leucaena grew slowly, but depressed the yield of the first 4 to 6 crop rows(1.8 to 2.7 m from hedge) in subsequent years. The negative effect of Leucaena was noted more on sunflower in a relatively dry year than on sorghum in other years.

Results from the TCI plots were used to estimate the yield of five hedgerow intercropping (HI) systems with varying alley widths (2.7 to 9.9 m). Comparison with sole stands of Leucaena and crops indicated that HI was more productive particularly at close alley widths. For example, hedges spaced at 2.7 m and 3.6 m averaged 37% and 25% higher productivity than the respective sole stands; but this advantage may be an overestimation of the real potential.

The relevance of TCI experiments for studying agroforestry systems, their merits and limitations, especially of the design employed in this study are discussed.

Key words

Tree-crop interface row orientation hedgerow intercropping alley cropping Leucaena sorghum sunflower experimental design semi-arid tropics 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Huxley PA (1985a) The tree/crop interface-or simplifying the biological/environmental study of mixed cropping agroforestry systems. Agroforestry Systems 3: 251–266Google Scholar
  2. Huxley PA (1985b) Systematic designs for field experimentation with multipurpose trees. Agroforestry Systems 3: 197–207Google Scholar
  3. Huxley PA (1985c) The basis of selection, management and evaluation of multipurpose trees-an overviewe. In: MGR Cannel and JE Jackson (eds) Attributes of trees as crop plants. pp. 13–34, Institute of Terrestial Ecology. Natural Environment Research Council, UKGoogle Scholar
  4. ICRISAT (International Crops Research Institute for the Semi-Arid Tropics) (1986). Annual Report for 1985, ICRISAT, Patancheru P.O. 502 324, IndiaGoogle Scholar
  5. Jackson JE (1983) Light climate and crop-tree mixtures. In: PA Huxley (ed) Plant research in agroforestry, pp. 365–378. International Council for Research in Agroforestry, Nairobi, KenyaGoogle Scholar
  6. Roger JH (ed) (1988) Proceedings of an ICRAF Mini-workshop on experimental design. 7–11 June 1988, pp 41. International Council for Research in Agroforestry, Nairobi, KenyaGoogle Scholar
  7. Rao MR, Sharma MM and Ong CK (1990) A study of the potential of hedgerow intercropping in semi-arid India using a two-way systematic design. Agroforestry Systems 11: 243–258CrossRefGoogle Scholar
  8. Singh RP, Ong CK and Saharan N (1989) Above and below ground interactions in alley cropping in semi-arid India. Agroforestry Systems 9: 259–274Google Scholar
  9. Trenbath BR (1989) Resource use by intercrops. In: CA Francis (ed). Multiple systems. pp 57–81, Macmillan Publishing Co., New YorkGoogle Scholar
  10. Willey RW (1979) Intercropping-its importance and research needs. Part 1. Competition and yield advantages. Field Crop Abstracts 32(1): 1–10Google Scholar

Copyright information

© Kluwer Academic Publishers 1991

Authors and Affiliations

  • M. R. Rao
    • 1
  • M. M. Sharma
    • 2
  • C. K. Ong
    • 2
  1. 1.International Council for Research in Agroforestry (ICRAF)NairobiKenya
  2. 2.International Crops Research Institute for the Semi-Arid Tropics (ICRISAT)A.P.India

Personalised recommendations