Assessment on nutrient levels in the aerial biomass of irrigated guava in São Francisco Valley, Brazil
In perennial crops, fertilizers are applied to restore the amount of nutrient removed from the plant by harvesting. Nevertheless, the immobilized nutrient inside the whole plant should be considered. Based on it, the nutrient concentrations in the guava leaf and fruit and the nutrient contents remov...
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Published in: | Revista Brasileira de fruticultura Vol. 29; no. 3; pp. 705 - 709 |
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Main Authors: | , , , , , |
Format: | Journal Article |
Language: | English |
Published: |
Sociedade Brasileira de Fruticultura
2007
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Subjects: | |
Online Access: | Get full text |
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Summary: | In perennial crops, fertilizers are applied to restore the amount of nutrient removed from the plant by harvesting. Nevertheless, the immobilized nutrient inside the whole plant should be considered. Based on it, the nutrient concentrations in the guava leaf and fruit and the nutrient contents removed by fruits and post-harvest pruning were evaluated in an irrigated orchard, in Petrolina, State of Pernambuco, Brazil. The greatest contents removed by fruits were N and K among the macronutrients, while Fe, Zn and Mn presented higher levels among the micronutrients. More than 60% of the total content of N, P, K, Mg, Fe, and B removed by pruning were immobilized in the leaf and non-marketable fruit.
A aplicação de fertilizantes em culturas perenes baseia-se na reposição das quantidades de nutrientes removidas pelos frutos, mas a imobilização de nutrientes deve ser também considerada. Assim, foram determinadas as concentrações de nutrientes nas folhas e nos frutos da goiabeira cv.Paluma, irrigada, em Petrolina-PE, bem como as quantidades de nutrientes removidas pelos frutos e pela poda de frutificação do ciclo seguinte. Entre os macronutrientes, o N e o K foram os mais removidos pelos frutos, enquanto o Fe , o Zn e Mn apresentaram maiores valores entre os micronutrientes. No mínimo, 60% das quantidades totais de N,P,K,Fe e B removidas pela poda estavam imobilizadas na folha e no fruto não-comerciável. |
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Bibliography: | 10.1590/S0100-29452007000300054 http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452007000300054 |
ISSN: | 0100-2945 0100-2945 |
DOI: | 10.1590/S0100-29452007000300054 |