Acúmulo de macronutrientes pela cultivar de cebola 'Superex' estabelecida por semeadura direta

Autor:	Arthur Bernardes Cecílio Filho, André May, Pablo Forlan Vargas, Diego Resende de Queirós Pôrto
Přispěvatelé:	Universidade Estadual Paulista (Unesp)
Rok vydání:	2007
Předmět:	Allium cepa Allium cepa L General Veterinary growth nutrição de plantas plant nutrition Biology cropping system crescimento Bulb sistema de cultivo Horticulture Botany Animal Science and Zoology Dry matter Agronomy and Crop Science
Zdroj:	Ciência Rural, Volume: 37, Issue: 4, Pages: 949-955, Published: AUG 2007 SciELO Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP Ciência Rural v.37 n.4 2007 Ciência Rural Universidade Federal de Santa Maria (UFSM) instacron:UFSM
ISSN:	0103-8478
DOI:	10.1590/s0103-84782007000400005
Popis:	Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:59:51Z No. of bitstreams: 1 S0103-84782007000400005.pdf: 178970 bytes, checksum: 6352fd6ce2677872b19d383f20ea164d (MD5) Made available in DSpace on 2013-08-22T18:59:51Z (GMT). No. of bitstreams: 1 S0103-84782007000400005.pdf: 178970 bytes, checksum: 6352fd6ce2677872b19d383f20ea164d (MD5) Previous issue date: 2007-08-01 Made available in DSpace on 2013-09-30T19:57:18Z (GMT). No. of bitstreams: 2 S0103-84782007000400005.pdf: 178970 bytes, checksum: 6352fd6ce2677872b19d383f20ea164d (MD5) S0103-84782007000400005.pdf.txt: 28740 bytes, checksum: cfb7007fd21379c3a1c6ae9c534cc181 (MD5) Previous issue date: 2007-08-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T15:14:52Z No. of bitstreams: 2 S0103-84782007000400005.pdf: 178970 bytes, checksum: 6352fd6ce2677872b19d383f20ea164d (MD5) S0103-84782007000400005.pdf.txt: 28740 bytes, checksum: cfb7007fd21379c3a1c6ae9c534cc181 (MD5) Made available in DSpace on 2014-05-20T15:14:52Z (GMT). No. of bitstreams: 2 S0103-84782007000400005.pdf: 178970 bytes, checksum: 6352fd6ce2677872b19d383f20ea164d (MD5) S0103-84782007000400005.pdf.txt: 28740 bytes, checksum: cfb7007fd21379c3a1c6ae9c534cc181 (MD5) Previous issue date: 2007-08-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) O objetivo do trabalho foi quantificar o acúmulo de macronutrientes ao longo do ciclo da cebola, cv. Superex, estabelecida por semeadura direta. O experimento foi conduzido na Fazenda Rio Doce, entre os municípios de Itobi e São José do Rio Pardo, SP. As amostragens de plantas foram realizadas aos 30, 50, 70, 90, 110, 130 e 150 dias após a semeadura (DAS), para determinação da matéria seca e do acúmulo dos nutrientes (N, P, K, Ca, Mg e S). Os acúmulos máximos de matéria seca da parte aérea e do bulbo foram, respectivamente, de 4,70g planta-1 e 17,86g planta-1, aos 150 DAS. A parte aérea e o bulbo contribuíram, respectivamente, com cerca de 20 e 80% na matéria seca da planta inteira ao final do ciclo. A seqüência de acúmulo dos nutrientes verificada para a cebola Superex foi: K>N>Ca>S>Mg>P. A planta de cebola acumulou 202,43; 31,23; 295,28; 172,42; 35,20 e 73,47mg, respectivamente, de N, P, K, Ca, Mg e S. Exportou, pelo bulbo, 67% do N, 85% do P, 68% do K, 57% do Ca, 56% do Mg e 81% do S acumulado pela planta. This research was aimed at counting the concentration of macronutrients throughout the onion, cv Superex, established by direct seeding. The experiment was conducted at Rio Doce farm, between the counties of Itobi and São José do Rio Pardo, state of São Paulo, Brazil (21°37'16S and 46°53'15W). The macronutrients N, P, K, Ca, Mg, and S as well as plant dry matter content were evaluated in plant samples taken at 30, 50, 70, 90, 110, and 150 days after seeding (DAS). The maximum dry matter content in the bulb and in the aerial part were reached at 150 DAS and were, respectively, of 4.70 and 17.86g plant-1. The aerial part and the bulb contributed respectively with 20 and 80% of the whole mature plant dry matter. The macronutrients were accumulated in the plant in the following order: K>N>Ca>S>Mg>P. The onion plant accumulated 202.43; 31.23; 295.28; 172.42; 35.20 e 73.47 mg of N, P, K, Ca, Mg, and S, respectively, and exported 67%, 85%, 68%, 57%, 56% and 81%, respectively, of N, P, K, Ca, Mg and S accumulated for the plant. Universidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias Universidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias
Databáze:	OpenAIRE
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