Open AccessEfficiency and Response to Phosphorus Use of Corn Cultivars in the Tropical Climate
Author(s) -
Weder Ferreira dos Santos,
Lucas Carneiro Maciel,
Osvaldo Ferreira,
Gabriel Mesquita da Rocha,
Joênes Mucci Pelúzio,
Layanni Ferreira Sodré,
Lucas Alves de Faria,
Adriano Silveira Barbosa,
Diogo Claudio da Silva
Publication year - 2021
Publication title -
international journal of plant and soil science
Language(s) - English
Resource type - Journals
ISSN - 2320-7035
DOI - 10.9734/ijpss/2021/v33i430428
Subject(s) - cultivar , randomized block design , phosphorus , sowing , human fertilization , potassium , zoology , nitrogen , agronomy , nutrient , urea , humid subtropical climate , horticulture , chemistry , environmental science , biology , organic chemistry , medicine , pathology
Aims: The present study evaluated the efficiency and response to phosphorus (P) use of corn cultivars in the tropical climate in southern Para State, Brazil.
Study Design: Two experiments were carried out, in low P (50 kg ha-1) and high P (200 kg ha-1) applications in Randomized block design (RBD), three replicates, and fourteen cultivars were used for the experiment.
Place and Duration of Study: The experiment was carried out in the 2019-20 harvest at Sitio Vitoria (8º18'32" S, 50º36'58" W), located in the municipality of Santa Maria das Barreiras, a southern region of Para state, Brazil.
Methodology: Phosphate fertilization was used in the sowing groove. In low P, 50 kg ha-1 of P2O5 were applied, and in high P were 200 kg ha-1 of P2O5. The source was simple superphosphate (18% P2O5). The dose in high P was defined to achieve high yields and considering the nutrient content in the soil, in low P the dose was well below. Nitrogen and potassium fertilization in cover were divided: 50% in V4 and 50% in V8. Doses of 150 kg ha-1 of N and 90 kg ha-1 of K2O were used, and fertilizers were used: urea (43% N) and potassium chloride (60% K2O).
Results: The highest means were: 8,710 kg ha-1 efficiency and 29.78 kg kg-1 response. The efficient cultivars were: ORION, BR 2022, CR 120, AL BANDEIRANTE, M 274, BRS 3046, and AG 8088. And those considered responsive were: BM 3061, BR206, CATIVERDE 02, BR 205, ANHEMBI, BR 2022, and BRS 3046.
Conclusion: The cultivar BR 2022 and BRS3046 showed high efficiency and also a response to phosphorus use.