Agroforestry Systems

, Volume 30, Issue 3, pp 351–362

Nutrient dynamics during the first three years of an alleycropping agroecosystem in southern USA

  • R. P. Matta-Machado
  • C. F. Jordan
Article

DOI: 10.1007/BF00705219

Cite this article as:
Matta-Machado, R.P. & Jordan, C.F. Agroforest Syst (1995) 30: 351. doi:10.1007/BF00705219

Abstract

An alleycropping system (AC), usingAlbizia julibrissin as the tree species, was compared to an annual legume-based cropping system (NA) over a three-year period. In both AC and NA, a crop rotation was implemented with the following sequence:Mucuna deering iana, Trifolium incarnatum, Sorghum bicolor, Triticale aestivum, andSorghum bicolor.

Aboveground biomass of crops was analyzed for C, N, P, K, Ca, and Mg. A soil fractionation method was used to determine P dynamics in different treatments through time.

Aboveground net primary productivity (NPP) was higher in the AC than in the NA. Nutrient input-output balance of N, P, K, Ca, and Mg from January through November 1991 was higher for AC than for NA. Area-based sorghum yield in 1991 was lower in AC than in NA. comparative sorghum yield in 1991 at 1 m distance from the hedgerow was lower than NA sorghum. In a three year period, the alleycropping system seemed to be more efficient in tapping unavailable forms of soil P, and achieved a higher P stock than the annual legume-based cropping system.

Key words

Albizia julibrissin Sorghum bicolor humid subtropics phosphorus fractionation nutrient dynamics 

Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • R. P. Matta-Machado
    • 1
  • C. F. Jordan
    • 1
  1. 1.Institute of EcologyUniversity of GeorgiaAthensUSA
  2. 2.Departmento de Biologia, Geral, Instituto de Ciências BiológicasUniversidade Federal de Minas GeraisBelo HorizonteBrazil

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