AvaliaÃƒÂ§ÃƒÂ£o de cultivares de alface crespa produzidas em - Unesp

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xi Palavras-chave: ambientes, cultivares, cultivo sem solo, Lactuca sativa L., sistema hidropônico-NFT EVALUATING CRISPY LETTUCE CULTIVARS PRODUCED UNDER THE NFT- HYDROPONIC SYSTEM IN TWO TYPES OF ENVIRONMENTALS IN RIBEIRÃO PRETO, STATE OF SÃO PAULO, BRAZIL SUMMARY - Due to changes in feeding habits, lettuce consumption has been increasing and must be supplied daily throughout the year. As a result, many producers have adopted hydroponics’ cultivation. In spite of this, many cultivars are not yet adapted to this technology. The objective of this study was to evaluate the performance of five lettuce cultivars grown in two environmentals in NFT (“Nutrient Film Technique”) hydroponic system in the period from Feb/06 to Apr/07 2006 in Ribeirão Preto, state of São Paulo, Brazil. To accomplish this, cultivars Pira Roxa, Pira Vermelha, Locarno, Crespona gigante, and Verônica were evaluated in conventional and climatizated greenhouse in the NFT system. A randomized-block experimental design was used, consisting of five cultivars in three blocks. Harvest was performed 61 days after seeding. Evaluations were made for fresh and dry mass of the aerial part, stem, and roots; number of leaves larger than 10 cm; and total number of leaves. Cultivar Crespona gigante in fresh weight and dry matter of the aerial part did not differ from cultivar Verônica, but it was superior to them cultivars Pira Roxa, Pira Vermelha and Locarno.The cultivars Pira Roxa and Pira Vermelha suggested a better adaptation, showing better resistance to bolting. There was no significant effect of the cultivars × environments interaction, demonstrating that the cultivars had similar behaviors in both environments. There was a larger consumption of water by the lettuce plants under the conventional greenhouse conditions in comparison to the acclimated one, probably due to their higher temperatures and lower air relative humidities. The extraction of nutrients by leaves lettuce plants (average five to cultivate) obeyed to the followed the decreasing order: K>N>Ca>Mg>P>S>Fe>Mn>Zn>Cu.
xii Keywords: cultivars, environments, Lactuca sativa L., NFT-hydroponic system, soilless cultivation.
Page 1 and 2: UNIVERSIDADE ESTADUAL PAULISTA FACU
Page 3 and 4: UNIVERSIDADE ESTADUAL PAULISTA FACU
Page 5 and 6: ii ! "#$%& ' #( )
Page 7 and 8: iv HOMENAGEM ESPECIAL Ao Prof. Dr.
Page 9 and 10: vi AGRADECIMENTOS À CATI - Coorden
Page 11 and 12: viii SUMÁRIO Página RESUMO.......
Page 13: x AVALIAÇÃO DE CULTIVARES DE ALFA
Page 17 and 18: 2 Além disso, a própria existênc
Page 19 and 20: 4 uma área cultivada de 330 ha, co
Page 21 and 22: 6 Repolhuda-manteiga: apresentam fo
Page 23 and 24: 8 respectivamente, durante a época
Page 25 and 26: 10 O período de maior consumo é n
Page 27 and 28: 12 atua na fixação de nitrogênio
Page 29 and 30: 14 2.6.1. A técnica do fluxo lamin
Page 31 and 32: 16 cultivares Elba e Marisa (crespa
Page 33 and 34: 18 3. MATERIAL E MÉTODOS 3.1. Loca
Page 35 and 36: 20 (150 µ, aditivada contra raios
Page 37 and 38: 22 A análise da solução nutritiv
Page 39 and 40: 24 3.7.3. Massa da matéria seca da
Page 41 and 42: 26 3.9. Dados meteorológicos Os da
Page 43 and 44: 28 4. RESULTADOS E DISCUSSÃO 4.1.
Page 45 and 46: 30 Na casa de vegetação climatiza
Page 47 and 48: 32 quentes, principalmente no plant
Page 49 and 50: 34 Tabela 4. Teste F para análise
Page 51 and 52: 36 0,34 L.pl -1 .dia -1 , valor com
Page 53 and 54: 38 Tabela 5. Valores médios dos te
Page 55 and 56: 40 Tabela 7. Concentração do macr
Page 57 and 58: 42 As cultivares Pira Vermelha e Pi
Page 59 and 60: 44 cv. Pira Roxa, com o índice 0,6
Page 61 and 62: 46 As cultivares testadas obedecera
Page 63 and 64: 48 6. REFERÊNCIAS AGRIANUAL 2000:
Page 65 and 66:
50 CAETANO, L.C.S.; FERREIRA, J.M.;
Page 67 and 68:
52 FAQUIN, V.; FURTINI NETO, A.E.;
Page 69 and 70:
54 GUALBERTO, R.; OLIVEIRA, P.S.R.;
Page 71 and 72:
56 MAROUELLI, W. A.; SILVA, W.L.C.S
Page 73 and 74:
58 (mestrado)-Escola Superior de Ag
Page 75 and 76:
60 SANCHEZ. S.V. Produção de hort
Page 77 and 78:
62 VASCONCELOS, U.M., ARAÚJO NETO,
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AvaliaÃƒÂ§ÃƒÂ£o de cultivares de alface crespa produzidas em - Unesp

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