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| Titel: |
DEFICIENCY SYMPTOMS OF MACRONUTRIENTS AND OF BORON IN HYBRIDS CLONES OF Eucalyptus grandis WITH Eucalyptus urophylla |
| Auteur: |
Ronaldo Luiz Vaz de Arruda Silveira Adônis Moreira Ernesto Norio Takashi Fábio Sgarbi Edward Fagundes Branco |
| Verschenen in: |
Cerne |
| Paginering: | Jaargang 8 (2002) nr. 2 pagina's 107-116 |
| Jaar: |
2002 |
| Inhoud: |
ABSTRACT: To characterise symptoms of macronutrient and boron deficiencies in hybrid clones ofEucalyptus grandis with Eucalyptus urophylla, a trial was conducted using nutrient solution, withtreatments including complete solution and minus N, minus P, minus K, minus Ca, minus Mg, minus Sand minus B with four replicates. Descriptions of the symptoms were made monthly, 4 months afterthe establishment of the treatments. Samples of leaves were collected to determine nutrient concentrations,taking the fifth and sixth leaf as standards, counted from the tip of the branches in both upperand lower parts of the crown. Another sampling was performed, collecting only leaves with deficiencysymptoms,for N, P, K and Mg using old leaves and for Ca, S and B young leaves. The sequence of symptomsappearance was N, P, B, K, Ca, Mg and S. Nutrients concentrations in leaves of treatments withomitted nutrients were lower as compared to leaves of the complete treatment, indicating that thesymptoms described were really due to the deficiency effect. The nutrient concentration of leaves withhigh symptoms was smaller than those for the fifth and sixth leaves, except for calcium. Eventhough,these leaves appeared to be adequate to predict nutritional deficiencies in Eucalyptus. The highestintensity of symptoms occurred for boron and the lowest for sulphur. |
| Uitgever: |
Universidade Federal de Lavras - UFLA (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 25 van 112 gevonden artikelen
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