Interactive effects of increased plant density, cultivars and N rates in environments with different cotton yield recovery potential

Autor(es)

Galdi, Leonardo Vesco ^[1] ; dos Santos Cordeiro, Carlos Felipe ^[2] ; Silva, Bruno de Senna E. ^[3] ; Rodriguez de la Torre, Elio Jesus ^[4] ; Echer, Fabio Rafael ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo Western Univ, Dept Agron, Km 572, BR-19067175 Presidente Prudente, SP - Brazil

^[2] Sao Paulo State Univ, Coll Agr Sci, Dept Crop Sci, BR-18610307 Botucatu, SP - Brazil

^[3] COFCO Int, Potirendaba, SP - Brazil

^[4] Solinfitec, Primavera Do Leste, Mato Grosso - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INDUSTRIAL CROPS AND PRODUCTS; v. 176, FEB 2022.
• Citações Web of Science: 0

Resumo

Nitrogen (N) is one of the most absorbed and exported nutrients by cotton plants (Gossypium hirsutum L.), but excessive rates can result in excessive growth and reduce fiber yield and quality. Combinations of high N rates and high plant density reduced yields, especially in locations where yield is higher than 2000 kg ha(-1) of fiber. The effect on fiber quality (mainly micronaire and fiber strength) was lower in a location with the yield lower than 1600 kg ha(-1) of fiber and higher where the yield is higher than 2000 kg ha(-1) of fiber. Increasing the N rate is a strategy to boost yields with low soil fertility in low plant density crops and early maturation cultivars. The highest fiber yields were obtained with plant populations between 6.6 and 8.6 plants m(-2) (66,000-86,000 plants ha(-1)) and the best N dose depends on the plant population. Proper management of plant density and N fertilization must consider the specific cultivar, yield environment, and cotton yield potential. (AU)

• Processo FAPESP: 18/20829-3 - Mapeamento da produção, produtividade e qualidade da fibra de cultivares de algodão em resposta ao nitrogênio e à densidade de plantas
• Beneficiário: Leonardo Vesco Galdi
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica