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| Ernani,Paulo Roberto; Dias,Jaques; Borges,Mário. |
| Tanto o excesso quanto a deficiência de N causam efeitos negativos na produtividade e na qualidade dos frutos de macieira. Como a taxa de absorção de N pelas árvores de macieira é afetada pela demanda das mesmas, dentro da estação de crescimento, e pelo N disponível no solo, é importante conhecer a necessidade da adição suplementar desse nutriente e a melhor época para aplicá-lo. O presente trabalho objetivou avaliar o efeito da época de aplicação de N ao solo na produtividade de frutos de duas cultivares de macieira. Os experimentos, um para a Gala e outro para a Fuji, foram conduzidos de 1990 a 1996, em Vacaria, RS, num pomar plantado em 1988, na densidade de1481 árvores ha-1, sobre um Latossolo bruno com 4,0% de matéria orgânica, 60% de argila e pH 6,9.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutrição de macieiras; Nitrogênio; Gala; Fuji. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782000000200005 |
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| Ernani,Paulo Roberto; Rogeri,Douglas Antônio; Proença,Marcelo Machado; Dias,Jaques. |
| The effect of N addition on apple yield and quality may vary according to the tree vigor. Apple trees developed over vigorous rootstocks had shown no response to N application in Brazil. In this study it was evaluated the effect of N addition to the soil on yield and quality of ´Royal Gala´ apples grafted on a dwarf rootstock (M.9). The orchard was planted in 1995 (2,857 trees ha-1) on an Oxisol containing 40 g kg-1 of organic matter and pH 6.0. The experiment was carried out from 1998 up to 2005. Treatments consisted of rates of N (0, 50, 100 and 150 kg ha-1 year-1 from 1998 to 2001, and respectively 0, 100, 200 and 300 kg ha-1 afterwards), all broadcasted within the tree row in two equal splits, at bud break and after harvest, as ammonium sulfate.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apple yield; M.9 rootstock; Fruit quality; Nitrogen. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452008000400044 |
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| Ernani,Paulo Roberto; Dias,Jaques; Amarante,Cassandro Vidal Talamini do; Ribeiro,Diorvânia Cardoso; Rogeri,Douglas Antonio. |
| Calcium sprays have normally improved both the quality and the storage life of apples throughout the world because Ca helps to prevent many fruit disorders and that taken up from the soil does not often reach the fruit in adequate amounts. Since the efficacy of Ca sprays varies according to soil, apple cultivar, and weather conditions, this study was carried out from 1998 to 2004, in the Southern of Brazil, in order to assess the effect of Ca sprays on the quality and storability of 'Gala' fruits. The experiment was set up in an orchard planted in 1988, on a density of 1234 trees/ha. Treatments consisted of 0, 4, 8, and 12 annual sprays of 0.5% CaCl2 regularly distributed 30 days after petal fall until one week before harvest. Fruits of the same size and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Malus domestica; Nutrition; Bitter pit; Lenticel blotch pit; Calcium chloride. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452008000400009 |
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| Ernani,Paulo Roberto; Dias,Jaques. |
| Since there is no chemical method to assess N availability from field soil samples, this nutrient is still recommended based on regional field trials. This study aimed to evaluate the effect of spring application of N to the soil on fruit yield of apple cultivars. Two experiments were carried out, respectively for Gala and Fuji. The trees, grafted on MM 106 rootstock, were planted in 1987, spaced 4.50 x 1.80m, in a clayed Oxisol (Hapludox) with 4.0% of organic matter, in Vacaria (RS), Southern Brazil. Treatments were applied annually, from the spring of 1990, in the tree row, over a 1.5-m-wide strip, as urea, and consisted of four rates of N corresponding to 0, 27.5, 55.0 and 82.5kg ha-1 in the first three years, and respectively 0, 50, 100 and 120kg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apple yield; Nitrogen; Gala; Fuji. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781999000400013 |
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