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CIFOR-ICRAF s’attaque aux défis et aux opportunités locales tout en apportant des solutions aux problèmes mondiaux concernant les forêts, les paysages, les populations et la planète.

Nous fournissons des preuves et des solutions concrètes pour transformer l’utilisation des terres et la production alimentaire : conserver et restaurer les écosystèmes, répondre aux crises mondiales du climat, de la malnutrition, de la biodiversité et de la désertification. En bref, nous améliorons la vie des populations.

CIFOR–ICRAF publishes over 750 publications every year on agroforestry, forests and climate change, landscape restoration, rights, forest policy and much more – in multiple languages.

CIFOR–ICRAF addresses local challenges and opportunities while providing solutions to global problems for forests, landscapes, people and the planet.

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Green manure from prunings and mineral fertilizer affect phosphorus adsorption and uptake by maize crop in a gliricidia-maize intercropping

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Gliricidia sepium-maize intercropping has shown to be a suitable option for soil nutrients replenish- ment and for sustainable crop production in Southern Malawi. This study was carried out to understand the effect of green manure on phosphorus sorption and subsequent crop uptake under gliricidia ( G. sepium )-maize intercropping. The experiment consisted of a factorial combination of two cropping practices (maize with and without gliricidia), three rates of inorganic N fertilizer (0, 46 and 92 kg N/ha), and inorganic phosphorous (P) fertilizer (0, 20 and 40 kg P 2 O 5 ha -1 ) combined. Application of gliricidia prunings and inorganic P fertilizers reduced the P sorption capacity of the soil and maize P uptake. Langmuir P affinity constant and the Freundlich P adsorption constant were significantly reduced with application of gliricidia prunings and inorganic P fertiliser. Combination of gliricidia prunings and inorganic P fertiliser further reduced the P sorption capacity of the soils compared to gliricidia prunings alone. The results indicate that addition of gliricidia prunings increases P availability through reduced P sorption capacity of the soil and recycling of P. combination of gliricidia prunings and inorganic P fertiliser has an added benefit compared to application of either gliricidia prunings or inorganic P fertiliser alone.

DOI:
https://doi.org/10.5897/SRE.9000535
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