Phosphorus availability under annual cropping, alley cropping, and multistrata agroforestry systems

Authors: Szott, L.; Melendez, G.

Source: Agroforestry Systems, Volume 53, Number 2, October 2001 , pp. 125-132(8)

Publisher: Springer

Buy & download fulltext article:


Price: $47.00 plus tax (Refund Policy)


The hypothesis that agroforestry systems conserve P in forms that are more crop-available than those found in annual cropping systems was tested on two tropical sites: an Ultisol in Yurimagas, Peru, and a volcanically derived Inceptisol in Turrialba, Costa Rica. In both sites, the Hedley P fractions were compared in annual cropping, alley cropping, multistrata agroforestry and old forest systems. On the Ultisol, the effect of P fertilization on the soil P fractions was also examined. Under non-fertilized conditions, the multistrata and forest systems maintained more and a greater proportion of P in plant-available resin form than the annual or alley cropping systems. Greater resin P was associated with greater amounts and percentages of P in bicarbonate fractions and less P in residual fractions. The latter may be caused by greater and more temporally constant organic matter additions, less mineralization of labile soil organic matter fractions due to lower soil temperatures, and the long-term mobilization of residual P due to P immobilization in the biomass of the multistrata or forest systems. With P fertilization, resin P was related to inorganic P fractions. However, resin P increased even more when inorganic P fertilizers were combined with organic residue additions.

Keywords: Costa Rica; Hedley P fractions; Peru; humid tropics; inceptisol; ultisol

Document Type: Research Article


Publication date: October 1, 2001

Related content


Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content

Text size:

A | A | A | A
Share this item with others: These icons link to social bookmarking sites where readers can share and discover new web pages. print icon Print this page