Preliminary dris norms and sufficiency range for 'Paluma' guava tree

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:48:18Z No. of bitstreams: 1 S0100-29452013000100033.pdf: 2504655 bytes, checksum: c76c64c0438b459f6bec3075b3fdf855 (MD5) Made available in DSpace on 2013-08-22T18:48:18Z (GMT). No. of bitstreams: 1 S0100-29452013000100033.pdf: 2504655 bytes, checksum: c76c64c0438b459f6bec3075b3fdf855 (MD5) Previous issue date: 2013-03-01 Made available in DSpace on 2013-09-30T19:38:08Z (GMT). No. of bitstreams: 2 S0100-29452013000100033.pdf: 2504655 bytes, checksum: c76c64c0438b459f6bec3075b3fdf855 (MD5) S0100-29452013000100033.pdf.txt: 36832 bytes, checksum: 72f373933ff7fc031c41b2f3857aa426 (MD5) Previous issue date: 2013-03-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T15:10:14Z No. of bitstreams: 2 S0100-29452013000100033.pdf: 2504655 bytes, checksum: c76c64c0438b459f6bec3075b3fdf855 (MD5) S0100-29452013000100033.pdf.txt: 36832 bytes, checksum: 72f373933ff7fc031c41b2f3857aa426 (MD5) Made available in DSpace on 2014-05-20T15:10:14Z (GMT). No. of bitstreams: 2 S0100-29452013000100033.pdf: 2504655 bytes, checksum: c76c64c0438b459f6bec3075b3fdf855 (MD5) S0100-29452013000100033.pdf.txt: 36832 bytes, checksum: 72f373933ff7fc031c41b2f3857aa426 (MD5) Previous issue date: 2013-03-01 O diagnóstico nutricional a partir da análise do tecido foliar é um instrumento eficiente para detectar desequilíbrios e auxiliar no processo de recomendação de adubação. Assim, objetivou-se avaliar a relação entre os índices DRIS e os teores foliares de nutrientes, estabelecer teores foliares adequados de nutrientes com o DRIS e validar normas DRIS para a goiabeira 'Paluma'. Avaliou-se um pomar comercial nas condições de cultivo do Estado de São Paulo, durante seis safras de produção de frutos, provenientes de ensaios de adubação orgânica e mineral, totalizando 168 amostras. A ordem dos nutrientes limitantes por falta em ordem decrescente foram: Fe>K>Mn>Ca>B>N>P>Cu>S>Mg>Zn, e limitantes por excesso em ordem decrescente foram: Cu>Fe>P>Mn=Mg>Zn>Ca>B>K>S>N. As faixas adequadas, provenientes dos índices DRIS, são: 18-21; 1,5-1,7; 15-17; 8-11; 1,8-2,5 e 2,5-2,9 (g kg-1) para os macronutrientes N, P, K, Ca, Mg e S, respectivamente, e 26-38; 5-57; 54-112; 53-101 e 13-126 (mg kg-1) para os micronutrientes B, Cu, Fe, Mn e Zn, respectivamente. A produtividade das goiabeiras esteve associada ao estado nutricional. The nutritional diagnosis based on the analysis of leaf tissue is an efficient tool for detecting imbalances and help the process of fertilization recommendation. Thus, it was evaluated to establish preliminary DRIS norms, and to derive critical levels and sufficiency ranges of nutrients in the leaf tissue to Paluma guava cultivar in commercial orchards growing conditions in the State of São Paulo. It was evaluated six harvests of fruit production, from organic and mineral fertilizer, totaling 168 samples. The order of limiting nutrients for failure in descending order were: Fe> K> Mn> Ca> B> N> P> Cu> S> Mg> Zn, and limiting excess in descending order were: Cu> Fe> P> Mn = Mg> Zn> Ca> B> K> S> N. The tracks from the appropriate DRIS indices are: 18-21, 1.5 to 1.7, 15-17, 8-11, 1.8 to 2.5 and 2.5 to 2.9 (g kg-1) for the macronutrients N, P, K, Ca, Mg and S, respectively, and 26-38, 5-57, 54-112, 53-101 and 13-126 (mg kg-1) for the micronutrients B, Cu, Fe, Mn and Zn, respectively. The yield of guava was related to nutritional status. CNPC Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Unesp Epamig Unesp