Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Effect of P-dipping on above- and below-Ground Growth of NERICA 4 Rice in Different Soil Types

Emmanuel Odama
,
Yasuhiro Tsujimoto
ORCID logo ,
Shin Yabuta
,
Isao Akagi
,
Rael Chepkoech
,
Ibrahim Soe
,
Jun-Ichi Sakagami
* ORCID logo
Version 1 : Received: 1 October 2023 / Approved: 2 October 2023 / Online: 2 October 2023 (04:18:31 CEST)

A peer-reviewed article of this Preprint also exists.

Odama, E.; Tsujimoto, Y.; Yabuta, S.; Akagi, I.; Chepkoech, R.; Soe, I.; Sakagami, J.-I. Effect of P-Dipping on Growth of NERICA 4 Rice in Different Soil Types at Initial Growth Stages. Sustainability 2023, 15, 15402. Odama, E.; Tsujimoto, Y.; Yabuta, S.; Akagi, I.; Chepkoech, R.; Soe, I.; Sakagami, J.-I. Effect of P-Dipping on Growth of NERICA 4 Rice in Different Soil Types at Initial Growth Stages. Sustainability 2023, 15, 15402.

Abstract

Phosphorus (P) deficiency is a major constraint limiting sustainable rice cultivation in sub-Saharan Africa—partly due to the deeply weathered soils that have low pH and contain high P-fixing Fe and Al oxides. Soil texture also affects P availability and use efficiency. In this study, we evaluated the combined effect of soil texture (sand, clay loam, and clay) and P treatments (P-dipping and two other P fertilizer levels) on growth of NERICA 4 rice in the initial growth stages. In a factorial experiment, we measured the interaction effects of soil texture and P treatments on shoot parameters and root morphology. Both treatments had significant interaction effects on all measured parameters, except shoot biomass, and affected the photosynthetic rate, with the highest mean values obtained under clay loam soil texture and P-dipping treatment, respectively. The treatments also affected rice root morphology. In a striking contrast, whereas mean root length under clay was significantly higher than that under clay loam texture, mean shoot P uptake under clay loam soil was significantly higher than that under clay soil texture. The interactive effect of soil texture and P-dipping influenced NERICA 4 shoot and root physiological and morphological characteristics under clay loam soil texture.

Keywords

phosphorus; Oryza sativa L.; nutrient uptake; photosynthetic rate; root morphology

Subject

Biology and Life Sciences, Agricultural Science and Agronomy

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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