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Fertilizer application levels in potato crops and the diagnosis and recommendation integrated system (Dris)

Agronomy, ISSN: 2073-4395, Vol: 11, Issue: 1
2021
  • 18
    Citations
  • 0
    Usage
  • 33
    Captures
  • 1
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    18
    • Citation Indexes
      17
    • Policy Citations
      1
      • Policy Citation
        1
  • Captures
    33
  • Mentions
    1
    • Blog Mentions
      1
      • Blog
        1

Article Description

The rates of nitrogen, phosphorus, and potassium fertilizers used in the cultivation of potatoes are often considered excessive, as they can cause imbalance among the essential elements present in the soil. Using leaf nutrient analysis, this study aimed to evaluate the productivity of potato tubers subjected to different rates of nitrogen (N), phosphorus (P), and potassium (K) to establish the diagnosis and recommendation integrated system indices. Three experiments were conducted, one for each nutrient (N, P, and K), with Agata and Atlantic cultivars in Unaí (Minas Gerais state) and the Agata cultivar in Mucugê (Bahia state). The nutrient rates were 0, 30, 70, 120, and 280 kg ha of N; 0, 150, 300, 600, and 900 kg ha of PO; and 0, 70, 110, 220, and 450 kg ha of KO. Agata and Atlantic had adequate nutritional balance under K application. Agata had a more adequate nutritional balance under P application in Mucugê, whereas K fertilization was more decisive for the nutritional balance in Unaí. The differences in the results can be explained by the different soil textures and nutrients in the soil between the regions. The results show the need to consider the soil conditions and the nutrient uptake/translocation capacity of cultivars before establishing rates to increase production revenue and avoid the waste of fertilizers.

Bibliographic Details

Roberta Camargos Oliveira; João Ricardo Rodrigues da Silva; Regina Maria Quintão Lana; Reginaldo de Camargo; José Magno Queiroz Luz; Alexandre Igor de Azevedo Pereira; Renata Castoldi

MDPI AG

Agricultural and Biological Sciences

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