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Please use this identifier to cite or link to this item: http://hdl.handle.net/10198/6227

Título: Olive yields and tree nutritional status during a four year period without nitrogen and boron fertilization
Autor: Rodrigues, M.A.
Pavão, Francisco
Lopes, João
Gomes, Vanessa
Arrobas, Margarida
Moutinho-Pereira, J.M.
Ruívo, Sérgio
Cabanas, J.E.
Correia, C.M.
Palavras-chave: Boron fertilization
Nitrogen fertilization
Olea europaea L
Soil boron availability
Soil nitrogen availability
Issue Date: 2011
Citação: Rodrigues, M. A.; Pavão, F.; Lopes, J. I.; Gomes, V.; Arrobas, M.; Moutinho-Pereira, J.; Ruívo, S.; Cabanas, J. E.; Correia, C. M. (2011) - Olive yields and tree nutritional status during a four year period without nitrogen and boron fertilization. Communications in Soil Science and Plant Analysis. ISSN 0010-3624. 42:7, p. 803-814
Relatório da Série N.º: 42;
Resumo: Nitrogen (N) and boron (B) are mobile elements in soil. Therefore, the application of these nutrients is typically performed annually, as a single dose, or even splitting it into several fractions in the case of N. In olive (Olea europaea L.), however, controversial literature has suggested that yearly application of N may not be required. In the case of B some authors indicated that one single application is sufficient for three or four years. Thus, the effect of these elements on olive yield, leaf N and B concentrations, as well as soil available N and B were investigated during a field trial performed in an olive orchard located in NE Portugal, in which N and B were not applied for four consecutive growing seasons. Fertilizer treatments consisted of the following: the control, which was a ‘complete’ fertilization plan where N and B were included (N+B treatment); –N treatment, with N excluded from the fertilization plan; and –B treatment, with B excluded. Available soil N and B were estimated from a pot experiment with Italian ryegrass (Lolium multiflorum L.) and from chemical laboratory extractions. Olive yield decreased significantly in the –N treatment in comparison to the control. A slight yield reduction in the –B treatment in comparison to the control was also observed. Leaf N and B concentrations decreased significantly in the –N and –B treatments, respectively, in comparison to the N+B treatment. Soil available N and B at the end of the experiment were significantly lower in the –N and –B treatments, respectively, in comparison to the N+B control. The results showed a continuous decrease in olive yield and leaf N and B concentrations, which reflected the reduction in soil available N and B in the treatments lacking the respective nutrient. Therefore, it seems prudent the recommendation of adjusted rates of N and B every year to prevent reduction in tree crop performance and improve nutrient use efficiency.
Arbitragem científica: yes
URI: http://hdl.handle.net/10198/6227
ISSN: 0010-3624
Appears in Collections:PTV - Artigos em Revistas Indexados ao ISI

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