ESTUDO INDICA POSSILIBILIDADE DE REDUÇÃO DE DOSES DE NITROGÊNIO E DE POTÁSSIO SE APLICADAS VIA FERTIRRIGAÇÃO EM COMPARAÇÃO COM AS MESMAS DOSES RECOMEDADAS PARA ADUBAÇÃO CONVENCIONAL NO CULTIVO DE BANANA
ESTUDO INDICA POSSILIBILIDADE DE REDUÇÃO DE DOSES DE NITROGÊNIO E DE POTÁSSIO SE APLICADAS VIA FERTIRRIGAÇÃO EM COMPARAÇÃO COM AS MESMAS DOSES RECOMEDADAS PARA ADUBAÇÃO CONVENCIONAL NO CULTIVO DE BANANA
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DOI: https://doi.org/10.22533/at.ed.0692412068
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Palavras-chave: Palavras Chave: Quimigação, Fertirrigação, Nutrição Mineral; Custo de Produção, Banana, Relação Custo Benefício.
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Keywords: Keywords: Chemigation, Fertigation, Mineral Nutrition; Production Cost, Banana, Cost-Benefit Ratio.
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Abstract: ABSTRACT: This work aimed to evaluate the effect of reducing N and K doses by 25% and 50% when applied via fertigation in relation to the same doses recommended for conventional fertilization in banana crops and also quantify the cost/ benefit from reducing these fertilizers. Six treatments were analyzed: T1 (100% N + 100% K2O) with full doses applied manually and applied through irrigation water (Fertigation): T2 (100% N + 100% K2O); T3 (100% N + 75% K2O); T4 (100% N + 50% K2O); T5(75% N + 100% K2O) and T6(50% N + 100% K2O). As a result, it was found that the reduction in N and K doses did not influence the average height of the plants; in the perimeter of the pseudostem, in the number of leaves/plant and in the leaf area. However, there was a significant difference in the length and diameter of the fruits when the K dose was reduced by 25% and the N doses by 25%. The reduction in N and K doses did not influence the average plant height data; pseudostem perimeter, number of leaves/plant and leaf area; there was a significant difference in the length and average diameter of the fruits when the dose of potassium was reduced by 25% and nitrogen by 25%, respectively; the reduction in nitrogen and potassium doses by up to 50% did not influence the levels of N, P and K and the N/K ratio in the leaves, number of fruits/bunch and number of fruits/handle, bunch weight, total weight of bunches, average bunch weight, average fruit weight, average fruit weight and commercial and total fruit productivity; the recommendation of the need to increase N and K doses when applied through fertigation should not be generalized; the cost/benefit ratios in Real/ha were: T1=1:7.25; T2=1:7.59; T3=1:8.44; T4= 1:13.97; T5= 1:7.91 and T6=1:8.02.
- José Crispiniano Feitosa Filho
- Gutemberg Pinto Leite Junior
- Jose Maria Pinto