Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
THE INFLUENCE OF TREES ON SOIL FERTILITY ON 2 CONTRASTING SEMIARID SOIL TYPES AT MATOPOS, ZIMBABWE
Autore:
CAMPBELL BM; FROST P; KING JA; MAWANZA M; MHLANGA L;
Indirizzi:
UNIV ZIMBABWE,DEPT BIOL SCI,POB MP 167 MT PLEASANT ZIMBABWE
Titolo Testata:
Agroforestry systems
fascicolo: 2, volume: 28, anno: 1994,
pagine: 159 - 172
SICI:
0167-4366(1994)28:2<159:TIOTOS>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Keywords:
DECOMPOSITION; LITTER QUALITY; SAVANNAS; SOIL MICROBIOLOGY; SOIL ORGANIC MATTER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
NO
Recensione:
Indirizzi per estratti:
Citazione:
B.M. Campbell et al., "THE INFLUENCE OF TREES ON SOIL FERTILITY ON 2 CONTRASTING SEMIARID SOIL TYPES AT MATOPOS, ZIMBABWE", Agroforestry systems, 28(2), 1994, pp. 159-172

Abstract

An investigation into the influence of indigenous trees on soil fertility was conducted in an area of semi-arid tropical savanna in Zimbabwe on two contrasting soil types: dystrophic savanna soils (sandy soils) and eutrophic savanna soils (fine-textured soils). The study adds further support to the growing literature showing that trees have a positive influence on soil fertility. The study suggests that tree clearance, as advocated in these agropastoral systems, may not necessarily result in long-term benefits. It is argued that the primary mechanism bywhich soil fertility is improved is through increased litter and soilorganic matter compartments under trees. The influence of trees on cation levels is greater on sandy soils than fine-textured soils becausethe exchange capacity of fine-textured soils is determined largely bysoil texture whereas organic matter is the prime determinant of exchange capacity in sandy soils. The present study demonstrates that fertility improvement under trees is not at the expense of fertility decline in the surface soils of the zone around the tree. Leaf quality, as reflected simply in leaf C:N ratio, influences decomposition rates but the activities of termites probably confound any simple relationship. Litter quality of tree species is probably important in determining levels of soil organic matter under canopies, with higher levels under species with lower leaf quality.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 21:58:21