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Cover Crops Affect Soil Mineral Nitrogen and N Fertilizer Use Efficiency of Maize No-Tillage System in the Brazilian Cerrado

Author

Listed:
  • Arminda Moreira de Carvalho

    (Embrapa Cerrados, BR-020, Km 18, Planaltina 73310-970, DF, Brazil)

  • Maria Lucrecia Gerosa Ramos

    (Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília, CEP, Brasília 70910-900, DF, Brazil)

  • Vivian Galdino da Silva

    (Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília, CEP, Brasília 70910-900, DF, Brazil)

  • Thais Rodrigues de Sousa

    (Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília, CEP, Brasília 70910-900, DF, Brazil)

  • Juaci Vitoria Malaquias

    (Embrapa Cerrados, BR-020, Km 18, Planaltina 73310-970, DF, Brazil)

  • Fabiana Piontekowski Ribeiro

    (Embrapa Cerrados, BR-020, Km 18, Planaltina 73310-970, DF, Brazil)

  • Alexsandra Duarte de Oliveira

    (Embrapa Cerrados, BR-020, Km 18, Planaltina 73310-970, DF, Brazil)

  • Robélio Leandro Marchão

    (Embrapa Cerrados, BR-020, Km 18, Planaltina 73310-970, DF, Brazil)

  • Ana Caroline Pereira da Fonseca

    (Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília, CEP, Brasília 70910-900, DF, Brazil)

  • Raíssa de Araujo Dantas

    (Embrapa Cerrados, BR-020, Km 18, Planaltina 73310-970, DF, Brazil)

Abstract

Cover crops in no-tillage systems may alter soil mineral N and influence the N fertilizer use efficiency (NFUE) of subsequent maize. The hypothesis of this work is that no-tillage systems with cover crops affect nitrate, ammonium and maize NFUE in the Brazilian Cerrado. The objective was to evaluate the cover crop mineralization effect on soil N mineral and maize NFUE in a no-tillage system, with and without N topdressing. The experiment was arranged in a randomized block split-plot design. The plots were represented by cover crops ( Cajanus cajan , Crotalaria juncea , Raphanus sativus and Mucuna aterrima ). The subplots consisted of the application (WN) or non-application (NN) of N topdressing to maize. The soil was sampled in six layers (up to 60 cm) at the end (April) and at the beginning of the rainy season (November). NH 4 + was lower for all cover crops and WN and NN management in April. NO 3 − differed between seasons and cover crops in WN and NN. The lignin concentration and N uptake of M. aterrima were the highest compared to other species. The highest NFUE was on R. sativus , showing higher fertilizer dependency. In a no-tillage system with cover crops, the N topdressing fertilization needs to be improved, considering mineralization.

Suggested Citation

  • Arminda Moreira de Carvalho & Maria Lucrecia Gerosa Ramos & Vivian Galdino da Silva & Thais Rodrigues de Sousa & Juaci Vitoria Malaquias & Fabiana Piontekowski Ribeiro & Alexsandra Duarte de Oliveira , 2024. "Cover Crops Affect Soil Mineral Nitrogen and N Fertilizer Use Efficiency of Maize No-Tillage System in the Brazilian Cerrado," Land, MDPI, vol. 13(5), pages 1-14, May.
    • Handle: RePEc:gam:jlands:v:13:y:2024:i:5:p:693-:d:1394945
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