High phosphorus fertilization reduces mycorrhizal colonization and plant biomass of three cultivars of pineapple
Por:
Trejo, Dora, Bañuelos J., Gavito, Mayra E., Sangabriel-Conde, Wendy
Publicada:
1 oct 2020
Resumen:
A strategy to increase the productivity of pineapple agricultural
systems is the excessive application of chemical fertilizers. In the
state of Veracruz, Mexico, pineapple fields are being fertilized with P
(180 to 240 kg ha(-1)) to maximize yields so that fertilizer
applications keep increasing. We assessed the interaction between
chemical phosphorus fertilizers, the establishment of mycorrhizal
associations and biomass production of Cayenne, Champaka, and MD2
cultivars of pineapple in a greenhouse experiment. Plants were
inoculated with a mycorrhizal consortium and grown with 0, 80, 200, 300,
500, and 600 mg phosphorus kg(-1) soil additions in 8 kg pots for 8
months. Phosphorus reduced mycorrhizal colonization already at the
lowest phosphorus fertilization dose in two of the three cultivars and
became minimal for all cultivars from 200 mg P kg(-1) soil. At the two
highest phosphorus fertilization levels, shoot dry biomass and the dry
weight of leaf D was reduced in all cultivars. The results show that the
farmer ` s practice of adding excessive fertilizer as an insurance
principle is reaching the levels where fertilization is becoming
detrimental for production and mycorrhizal benef its for the crop and
the soil are being eliminated.
Filiaciones:
Trejo, Dora:
Facultad de Ciencias Agrícolas, Universidad Veracruzana, Zona Universitaria, Circuito Gonzalo Aguirre Beltrán s/n, Xalapa, Veracruz, 91090, Mexico
Bañuelos J.:
Facultad de Ciencias Agrícolas, Universidad Veracruzana, Zona Universitaria, Circuito Gonzalo Aguirre Beltrán s/n, Xalapa, Veracruz, 91090, Mexico
Gavito, Mayra E.:
Centro de Investigaciones en Ecosistemas, Universidad Nacional Autónoma de México-Campus Morelia. Antigua, Carretera a Pátzcuaro 8701., Morelia, Michoacán, 58190, Mexico
Sangabriel-Conde, Wendy:
Facultad de Ciencias Agrícolas, Universidad Veracruzana, Zona Universitaria, Circuito Gonzalo Aguirre Beltrán s/n, Xalapa, Veracruz, 91090, Mexico
gold, Green Submitted
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