Fertilizer Application Levels in Potato Crops and the Diagnosis and Recommendation Integrated System (DRIS)

Agronomy

ReginaMaria Quintão Lana¹  Reginaldo de Camargo¹  JoséMagno Queiroz Luz¹  RobertaCamargos Oliveira¹  JoãoRicardo Rodrigues da Silva¹  AlexandreIgor de Azevedo Pereira²  Renata Castoldi³ 

[1] Campus Glória, Institute of Agricultural Science, Universidade Federal de Uberlândia, BR 050 km 78, sala 1C212, Uberlândia-MG 38410-337, Brazil;Ciência e Tecnologia Goiano-Campus Urutaí, Instituto Federal de Educação, Rod. Geraldo Silva Nascimento, Km-2,5-Zona Rural, Urutaí-GO 75790-000, Brazil;Institute of Agricultural Science, Universidade Federal de Uberlândia-Campus Monte Carmelo, km 1, Rodovia LMG-746, Monte Carmelo-MG 38500-000, Brazil;

关键词: fertilization;    nutritional balance;    nitrogen;    phosphorus;    potassium;    Solanum tuberosum;   

DOI  :  10.3390/agronomy11010051

来源: DOAJ

【 摘 要 】

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⁻¹ of N; 0, 150, 300, 600, and 900 kg ha⁻¹ of P₂O₅; and 0, 70, 110, 220, and 450 kg ha⁻¹ of K₂O. 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.

【 授权许可】

Unknown