Hydrated Lime Soil Coverage

Effect On Soil Temperature Reduction And Early Mandarin Colour Break

  • Giuliana Gambetta Facultad de Agronomía, Universidad de la República. Garzón 780, 12900 Montevideo, Uruguay
  • Carlos Mesejo Instituto Agroforestal Mediterráneo, Universidad Politécnica de Valencia. Camino de Vera s/n, 46022, Valencia, España
  • Alfredo Gravina Facultad de Agronomía, Universidad de la República. Garzón 780, 12900 Montevideo, Uruguay
  • Manuel Agustí Instituto Agroforestal Mediterráneo, Universidad Politécnica de Valencia. Camino de Vera s/n, 46022, Valencia, España
  • Carolina Fasiolo Facultad de Agronomía, Universidad de la República. Garzón 780, 12900 Montevideo, Uruguay
  • Florencia Rey Facultad de Agronomía, Universidad de la República. Garzón 780, 12900 Montevideo, Uruguay
  • Carmina Reig Instituto Agroforestal Mediterráneo, Universidad Politécnica de Valencia. Camino de Vera s/n, 46022, Valencia, España
  • Amparo Martínez-Fuentes Instituto Agroforestal Mediterráneo, Universidad Politécnica de Valencia. Camino de Vera s/n, 46022, Valencia, España
  • Oscar Bentancur Facultad de Agronomía, Universidad de la República. Garzón 780, 12900 Montevideo, Uruguay
Keywords: Clementine, Satsuma, degreening, maturation

Abstract

Citrus fruit colour is an important marketing feature. In view of the relative independence between internal and external maturity, in early mandarins fruit harvest takes place before reaching fruit full colouration. Since citrus fruit colour break is associated to natural temperature reduction, this work evaluated the efficiency of hydrated lime soil coverage on the advance of fruit colour break of Satsuma and Clementine. Experiments were carried out in Spain (Satsuma 'Iwasaki' and Clementina 'Clemenpons', grafted on citrange 'Carrizo') and in Uruguay (Satsuma 'Okitsu' and 'Clementina de Nules', grafted on P. trifoliata). Hydrated lime was applied between two and four months before harvest. Treatment diminished soil temperature between 0.5 °C and 3 °C in all situations. In Satsuma, treatment could not advance colour break, since soil temperature remained above 23 °C and 18 °C, thresholds below which root metabolism of citrange 'Carrizo' and P. trifoliata, respectively, is reduced. In Clementine, maturing two months later, the soil temperature remained below thresholds during at least one month before harvest, significan-tly advancing fruit colour break and increasing the percentage of fruit harvested early.

Published
2015-06-01
How to Cite
1.
Gambetta G, Mesejo C, Gravina A, Agustí M, Fasiolo C, Rey F, Reig C, Martínez-Fuentes A, Bentancur O. Hydrated Lime Soil Coverage. Agrociencia Uruguay [Internet]. 1Jun.2015 [cited 10Jul.2020];19(1):31-0. Available from: http://agrocienciauruguay.uy/ojs/index.php/agrociencia/article/view/313
Section
Plant production