Conservação de semente de Cedrela fissilis: teor de água da semente e temperatura do ambiente.

CONSERVAÇÃO DE SEMENTE DE

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E TEMPERATURA DO AMBIENTE

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MATERIAL E MÉTODOS

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RESULTADOS E DISCUSSÃO

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TABELA 1. Grau de umidade (U) e germinação (G) da semente de cedro, no início do armazenamento (1).

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U (%)

Desejado Obtido

G (%)

16 16,3 78,9 a

12 12,4 66,2 a

8 8,1 84,3 a

4 4,5 83,7 a

Período de armazenamento (dias)

Temperatura da câmara de armazenamento

(° C)

Grau de umidade da semente armazenada

(%)

40 120 200 280 360

10 16,3 15,2 14,5 15,0 16,1 16,5

12,4 11,9 10,5 11,5 12,3 13,1

8,1 8,4 8,0 8,5 8,8 9,2

4,5 3,2 5,3 4,5 4,7 5,0

20 16,3 14,5 14,7 14,9 16,6 16,9

12,4

10,2 10,7 11,1 11,9 13,2

8,1 6,4 8,0 8,4 9,2 9,4

4,5 3,5 5,0 5,0 4,0 5,2

TABELA 2. Grau de umidade da semente de cedro: valores médios (%, bu) obtidos durante o armazenamento.

TABELA 3. Germinação (%) da semente de cedro armazenada com diferentes graus de umidade (U %), sob diferentes temperaturas (T °C) (1).

Período de armazenamento (dias)

Fator de variação Tratamento

40 120 200 280 360

U 16,3 76,2 a 71,0 b 68,9 b 41,4 b 36,9 c

12,4 76,5 a 79,6 ab 91,1 a 78,0 a 79,2 b

8,1 76,7 a 87,0 a 89,1 a 86,3 a 90,0 a

4,5 78,7 a 79,4 ab 83,8 a 84,4 a 84,1 ab

T 10 79,2 a 81,8 a 87,5 a 78,6 a 84,9 a

20 74,9 a 77,2 b 80,2 b 68,9 b 62,5 b

U x T 16,3 / 10 77,6 a 66,2 a 78,1 b 67,2 b 86,1 a

12,4 / 10 77,4 a 75,2 a 96,0 a 81,8 ab 82,2 a

8,1 / 10 78,6 a 82,0 a 97,1 a 83,6 a 88,3 a

4,5 / 10 80,6 a 79,4 a 69,4 b 80,0 ab 81,9 a

16,3 / 20 74,8 a 75,5 a 58,8 c 17,9 c 1,4 c

12,4 / 20 74,8 a 83,2 a 84,5 ab 73,8 b 75,3 b

8,1 / 20 72,8 a 90,8 a 76,9 b 88,7 a 91,7 a

4,5 / 20 76,0 a 75,6 a 94,3 a 88,0 ab 86,1 ab

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Período de armazenamento (dias)

Fator de variação Tratamento

40 120 200 280 360

U 16,3 60,2 b 80,4 a 59,0 b 41,4 b 36,9 c

12,4 70,3 ab 81,4 a 81,3 a 78,0 a 79,2 b

8,1 79,8 a 86,7 a 86,5 a 86,3 a 90,0 a

4,5 80,6 a 79,8 a 79,4 a 84,4 a 84,1 ab

T 10 77,9 a 82,9 a 82,4 a 78,6 a 84,9 a

20 68,0 b 81,4 a 71,7 b 68,9 b 62,2 b

U x T 16,3 / 10 68,9 a 84,8 a 70,0 a 67,2 b 86,1 a

12,4 / 10 84,5 a 82,6 a 82,4 a 81,8 ab 82,8 a

8,1 / 10 78,3 a 85,3 a 91,9 a 83,7 a 88,3 a

4,5 / 10 79,1 a 78,5 a 82,4 a 80,4 ab 81,9 a

16,3 / 20 51,2 b 75,6 a 47,5 a 17,9 c 1,3 c

12,4 / 20 53,8 b 80,2 a 80,3 a 73,9 b 75,3 b

8,1 / 20 81,3 a 87,9 a 80,0 a 88,7 a 91,7 a

4,5 / 20 82,0 a 80,9 a 76,2 a 88,0 ab 86,1 ab

TABELA 4. Emergência (%) das semente de cedro armazenada com diferentes graus de umidade (U %) sob diferentes temperaturas (T ° C) (1).

CONCLUSÕES

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REFERÊNCIAS

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TABELA 5. Comprimento da parte aérea (hipocótilo), em cm, de plântula de cedro originária de semente armazenada com diferentes graus de umidade (U %), sob diferentes temperaturas (T ° C) (1).

Período de armazenamento (dias)

Fator de variação Tratamento

40 120 200 280 360

U 16,3 6,29 b 7,87 bc 5,85 b 1,67 c 2,60 c

12,4 7,04 ab 8,51 ab 8,68 a 4,65 b 4,82 b

8,1 7,08 ab 9,34 a 8,90 a 5,21 ab 5,63 ab

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T 10 8,07 a 8,82 a 8,23 a 4,86 a 6,01 a

20 6,14 b 7,37 b 6,99 b 3,86 b 3,84 b

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12,4 / 10 8,28 a 9,37 a 9,06 a 6,60 a 5,85 ab

8,1 / 10 8,02 a 9,24 a 8,82 a 4,47 b 6,64 a

4,5 / 10 8,10 a 7,20 b 7,61 a 5,57 ab 7,09 a

16,3 / 20 4,68 a 6,25 b 4,26 c 0,56 c 0,75 c

12,4 / 20 5,80 a 7,65 ab 8,30 ab 2,69 b 3,79 b

8,1 / 20 6,14 a 9,44 a 8,98 a 5,96 a 4,62 ab

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