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• W4292098061 abstract "A capacidade do algodoeiro de se recuperar após uma desfolha se faz em função do nível de redução da área foliar, estágio de desenvolvimento da planta em que ocorrer a injúria, condições climáticas e práticas do sistema de cultivo. O objetivo deste estudo foi avaliar os efeitos da desfolha no desenvolvimento, produtividade e qualidade de fibra do algodoeiro, nos sistemas de espaçamentos adensado e convencional. Para isso, conduziu-se experimentos em condições de campo, em Dourados (MS), utilizando-se a cultivar NuOpal RR®, em delineamento de blocos ao acaso (com parcelas subdivididas) e quatro repetições em dois sistemas de cultivo (adensado e convencional). Os tratamentos constituíram-se de cinco fases de desenvolvimento da cultura: V3, B1, F1, F5 e C1, (de acordo com a escala de Marur e Ruano (2001) e quatro níveis de desfolhamento artificial (0%, 33%, 66% e 99% da área foliar). O efeito da desfolha nos índices de produtividade e qualidade de fibras foi dependente do estádio do fenológico em que a cultura se encontrava independente do sistema de cultivo estudado. Já quando as plantas estavam nos estádios B1 e F1 e sofreram desfolha de 99%, este afetou os índices de qualidade de fibras, enquanto a redução de área foliar no estádio C1 não afetou os índices de qualidade e produtividade do algodoeiro. Palavras chave: Área Foliar. Dano. Sistemas de Cultivo. Algodão. Abstract The ability of the cotton plant to recover after defoliation is a function of the level of reduction of the leaf area, stage of development of the plant in which injury occurs, climatic conditions and practices of the cultivation system. The objective of this study was to evaluate the behavior of cotton submitted to different levels and times of defoliation in systems of conventional and narrow row cultivation. Experiments were conducted in field conditions, in Dourados (MS), using the cultivar NuOpal RR® in a randomized block design (with subdivided plots) and four replications in two cultivation systems (narrow row and conventional). The treatments consisted of five stages of crop development: V3, B1, F1, F5 and C1, (according to the scale of Marur & Ruano (2001) and four levels of artificial defoliation (0%, 33%, 66 % and 99% of the leaf area artificially eliminated.) The effect of defoliation on the indexes productivity and fiber quality depends on the phenological stage in which the culture was, independent of the cultivation system studied. When the plants were in stages B1 and F1 and suffered defoliation of 99%, this affected the fiber quality indexes, while the reduction of leaf area in the C1 stage did not affect the quality and productivity indexes of the cotton. Keywords: Leaf Area. Damage. Cultivation Systems. Cotton." @default.
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• W4292098061 date "2022-03-14" @default.
• W4292098061 modified "2023-10-16" @default.
• W4292098061 title "Impacto da Desfolha Artificial no Desenvolvimento, Produtividade e Qualidade de Fibra do Algodoeiro (Gossypium hirsutum L.) Convencional e Adensado" @default.
• W4292098061 doi "https://doi.org/10.17921/1415-6938.2021v25n5-espp714-723" @default.
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