Interaction between phosphorus fertilizer and arbuscular mycorrhizal fungal inoculants on yield components of cassava in northern Guinea savanna alfisols of Nigeria

  • I. A. Aliyu
  • A.A. Yusuf
Keywords: AMF inoculants, Cassava, Alfisol, Mycorrhizal response, P fertilizers.

Abstract

Field experiment was carried out in the Northern Guinea Savanna agro-ecology of Nigeria to examine the interaction between Phosphorus (P) fertilizer and Arbuscular Mycorrhizal Fungal (AMF) inoculants on cassava yield components. The experiment was laid in a split plot design with P fertilizers as main plot and AMF inoculants as subplots. There were three rates of P (0, 17.5, and 35 kg P2O5 ha-1) and three levels of AMF inoculants (Control, Glomygel and Mycodrip). The result showed a significant interaction between P and AMF in root/shoot ratio and mycorrhizal response ratio. Highest root/shoot was recorded with combination of 17.5 P2O5 ha-1+ control which depict increased sink strength. However, at 0 kg P2O5 ha-1, Glomygel and Mycodrip were 65.5% and 21.5% respectively greater than control. Mycorrhizal response was also shown to be highest with application of 0 kg P2O5 ha-1 + Glomygel showing much influence of the inoculants where no P was applied. Single effects of P and AMF showed that dry yield components were significantly (p<0.01) increased. The root dry weight was increased by 3.21 and 5.16 t ha-1as a result of application of 17.5 kg P2O5 ha-1 and 35 kg P2O5 ha-1respectively over application of 0 kg P2O5 ha-1. Glomygel and Mycodrip inoculants recorded 28% and 4% total plant dry yield increment respectively over control. This study shows that both P and AMF increased dry yield of cassava in Northern Guinea Savanna of Nigeria. The reproducibility at scale and in time is required for proper recommendation.

Keywords: AMF inoculants, Cassava, Alfisol, Mycorrhizal response, P fertilizers.

Journal Identifiers


eISSN: 2006-6996
print ISSN: 2006-6996