| Registro completo |
| Provedor de dados: |
Anais da ESALQ
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| País: |
Brazil
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| Título: |
Alterações morfológicas e citológicas do cafeeiro (Coffea arabica L, var. Bourbon (B. Rodr.) Choussy) cultivado em solução nutritiva decorrentes das deficiências e excessos dos macronutrientes
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| Autores: |
Accorsi,Walter R.
Haag,Henrique P.
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| Data: |
1959-01-01
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| Ano: |
1959
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| Resumo: |
The present work was carried out in order to study: (1) the symptoms of deficiency and excess of macronutrients (N, P, K, Ca, S, Mg) in the coffee plant (Coffea arabica L. var. Mundo novo); (2) the modifications induced by those treatments in the hystological make up of the leaves; (3) the effects of deficiency and excess on the growth and in the chemical composition of the plants. Young coffee plants were grown in nutrient solution, three treatments being used, namely: complete solution (HOAGLAND & ARNON, 1950), deficient solution, in which a giVen element was omitted, and solution with 3 times the concentration of the element under study. The main conclusions can be summaryzed as follows. 1. SYMPTOMS. Clear cut symptoms of malnutrition were observed in the treatments: -N, -P, +P, -Ca, -Mg, -S and +S; the signals - and + stared respectively for deficient and excess level. 2. HISTOLOGICAL EFFECTS. The most definite alterations took place in the treatments +P, -Mg and +S. Usually the characteristics of the chloroplasts were affected: loss of the green color and coalescence into irregular bodies.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Português
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761959000100002
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| Editor: |
Universidade de São Paulo
Escola Superior de Agricultura
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| Relação: |
10.1590/S0071-12761959000100002
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| Formato: |
text/html
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| Fonte: |
Anais da Escola Superior de Agricultura Luiz de Queiroz v.16 1959
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| Direitos: |
info:eu-repo/semantics/openAccess
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