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Influence of improved fallow systems and phosphorus application on arbuscular mycorrhizal fungi symbiosis in maize grown in western Kenya

Authors
  • Muchane, Mary Nyawira1
  • Jama, Bashir2
  • Othieno, Caleb3
  • Okalebo, Robert3
  • Odee, David4
  • Machua, Joseph4
  • Jansa, Jan5
  • 1 National Museums of Kenya, Botany Department, Nairobi, 00100, Kenya , Nairobi (Kenya)
  • 2 World Agroforestry Centre (ICRAF), Nairobi, 00100, Kenya , Nairobi (Kenya)
  • 3 Moi University, Department of Soil Science, Eldoret, Kenya , Eldoret (Kenya)
  • 4 Kenya Forestry Research Institute (KEFRI), Nairobi, 00100, Kenya , Nairobi (Kenya)
  • 5 Swiss Federal Institute of Technology (ETH) Zurich, Eschikon 33, Lindau, 8315, Switzerland , Lindau (Switzerland)
Type
Published Article
Journal
Agroforestry Systems
Publisher
Springer-Verlag
Publication Date
Aug 21, 2009
Volume
78
Issue
2
Pages
139–150
Identifiers
DOI: 10.1007/s10457-009-9249-3
Source
Springer Nature
Keywords
License
Yellow

Abstract

A field study was carried out on a six-year-old on-farm field trial during long-rains season (April–August) 2003 to investigate the effect of improved fallow systems and phosphorus application on arbuscular mycorrhiza fungi (AMF) symbiosis in maize. The trial comprised of maize rotated with a fast growing leguminous Crotalariagrahamiana fallow and a non-leguminous Tithonia diversifolia fallow for 3 years followed by continuous maize. The experiment was randomized complete block design with three cropping (continuous maize, Crotalaria fallow and Tithonia fallow) systems and two phosphorus levels (0 and 50 kg P/ha). AMF colonization in maize roots, maize yield and macro-nutrients uptake were recorded. Phosphorus applications improved (P < 0.05) early (<8 weeks old maize) AMF colonization, nutrient uptake and maize yield in improved fallow systems. Greater differences due to phosphorus application were noted in maize in Tithonia fallow than in Crotalaria fallow. Following phosphorus application, a positive relationship existed between early AMF colonization and maize yield (r = 0.38), and phosphorus and nitrogen uptake (r = 0.40 and r = 0.43, respectively), demonstrating the importance of phosphorus fertilization in enhancing low-input technologies (improved fallows systems) in phosphorus deficient and acidic soils of western Kenya.

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