Sistema Integrado de Diagnose e Recomendação (DRIS) em produção de mudas de citrus
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2014-02-19
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Universidade Federal de Goiás
Resumo
One of the most competitive and growth potential of the agribusiness sector is
the citrus industry. Citrus nurseries grown in protected cultivation, constitutes one of the
foundations of this growth. To achieve high productivity in any culture, there are a number
of factors, among which the supply of nutrients, in the manner and in adequate quantity
becomes paramount. The Diagnosis and Recommendation Integrated System (DRIS) was
developed to provide a diagnosis of the nutritional status of cultivated plants, helping the
decision on fertilizer recommendation for crops, being based on the balance of essential
nutrients to plants. The objective of this study aimed to obtain a database of foliar analysis
for establishment of DRIS and assess the nutritional status of two rootstocks (Rangpur lime
and Swingle Citrumelo) and two combinations of citrus seedlings (Orange Pear/Rangpur
lime and Orange Christmas /Swingle Citrumelo) grown in ‘Goiás’ collections hundred
twenty leaf samples for rootstocks and one hundred and twenty leaf samples for ready
seedlings were performed . With the data obtained organized a database. The database was
analyzed by the tracks or Critical Levels of Concentration and DRIS method by method.
Bands Concentration diagnosed for the Rangpur Lime rootstock , the most limiting nutrient
deficiency were Mg and Zn and excess P and Fe. For Citrumelo Swingle, limiting
disability K, S, Mn, Cu and Zn, excess Fe and N. For the citrus nurseries K, S and Zn were
the nutrients most limiting nutrient deficiency and P, Fe, Mg and N in excess. Zn is the
nutrient most often deficiency and Fe excess among rootstocks and citrus nurseries. The
DRIS diagnosed S as the most limiting disability and N as the most limiting for excess, and
still showed higher sensitivity for diagnosing nutritional problems.
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REZENDE, Cláudia Fabiana Alves. Sistema Integrado de Diagnose e Recomendação (DRIS) em produção de mudas de citrus. 2014. 102 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Goiás, Goiânia, 2014.