Potassium application to the cover crop prior to c... - BV FAPESP
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Potassium application to the cover crop prior to cotton planting as a fertilization strategy in sandy soils

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Autor(es):
Echer, Fabio Rafael [1] ; Souza Peres, Vinicius Jose [1] ; Rosolem, Ciro Antonio [2]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Oeste Paulista, Dept Agron, Raposo Tavares HWY, Km 572, BR-19067175 Presidente Prudente, SP - Brazil
[2] Sao Paulo State Univ, Botucatu, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: SCIENTIFIC REPORTS; v. 10, n. 1 NOV 23 2020.
Citações Web of Science: 0
Resumo

Urochloa grasses are used as cover crops in tropical cropping systems under no-till to improve nutrient cycling. We hypothesized that potassium (K) applied to ruzigrass (Urochloa ruziziensis) grown before cotton in a sandy soil could be timely cycled and ensure nutrition, yield and quality of cotton cultivars with no need to split K application. Field experiments were performed with different K managements, applied to ruzigrass, to cotton grown after grass and without grass, or split as it is done conventionally. No yield differences were observed on K fertilized treatments. At 0 K, cotton yields were low, but they increased by 16% when ruzigrass was grown before, and short fiber content was lower when there was more K available. Ruzigrass grown before cotton increased micronaire as much as the application of 116 kg ha(-1) of K without the grass. Fiber maturity was higher when K was applied to the grass or split in the grass and sidedressed in cotton. Growing ruzigrass before cotton allows for early K fertilization, i.e., application of all the fertilizer to de grass, since the nutrient is recycled, and cotton K nutrition is not harmed. Eventually K rates could be reduced as a result of higher efficiency of the systems. (AU)

Processo FAPESP: 16/16736-4 - Sincronismo de liberação de potássio de resíduos de Urochloa ruziziensis e sua absorção por cultivares de algodoeiro
Beneficiário:Vinicius Jose Souza Peres
Modalidade de apoio: Bolsas no Brasil - Mestrado