Cover Crops and Soil Phosphorus Availability
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Data
2017-01-01
Autores
Janegitz, Moniki Campos [UNESP]
Helene Martins, Ana Rita [UNESP]
Rosolem, Ciro Antonio [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Taylor & Francis Inc
Resumo
Plants affect soil phosphorus (P) solubility through root exudates, but studies are lacking on species used as relay or cover crops in tropical environments. We evaluated the effect of cover crops on soil phosphorus (P) availability in an oxisol. Ruzigrass (Brachiaria ruziziensis), pearl millet (Pennisetum glaucum), peanut (Arachis hypogaea), crambe (Crambe abyssinica), and sorghum (Sorghum bicolor) were grown in pots with soil. Phosphorus uptake, soil inorganic and organic P, maximum P adsorption capacity, and plant root systems were assessed. When root length density is high, the efficiency of P uptake is low due to root competition. Crambe results in greater soil P availability, while peanut and sorghum decrease the soil maximum P adsorption capacity, probably by exuding or stimulating microbial production of organic acids and phenolic compounds. Hence, crambe, peanut, and sorghum are species that may be of interest to increase P use efficiency in cropping systems.
Descrição
Palavras-chave
Crop rotation, fertilization, P adsorption, soil phosphorus
Como citar
Communications In Soil Science And Plant Analysis. Philadelphia: Taylor & Francis Inc, v. 48, n. 10, p. 1240-1246, 2017.