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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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Resource capture and utilization in intercropping: water

Exporter la citation

The capture and utilization of water by sole and intercrops are compared by decomposing crop production/unit area into uptake/unit area (capture) and production/unit uptake (utilization efficiency). Data are from published studies. Comparisons are made by contrasting data from the intercrops against weighted means from the sole crops, with weights based on the proportion of each species in the intercrop. Water capture by intercrops differs from water capture by sole crops only slightly (usually between 6 and +7%). Water-utilization efficiency by intercrops, however, greatly exceeds water-utilization efficiency by sole crops, often by more than 18% and by as much as 99%. Four mechanisms that may account for the consistent increases in water-utilization efficiency by intercrops are postulated on the basis of crop water relations theory but empirical data from intercropping studies are not adequate to test them. The water-utilization efficiency response by intercrops to increased levels of seasonably available water differs from the response by sole crops. Variation in plant density often affects water-utilization efficiency.

DOI:
https://doi.org/10.1016/0378-4290(93)90119-8
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    Année de publication

    1993

    Auteurs

    Morris R A; Garrity, D.P.

    Langue

    English

    Mots clés

    resource conservation, intercropping, water, water use efficiency, urea, decomposition

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