eCite Digital Repository

Nitrogen application rate and harvest date affect red drupelet reversion and postharvest quality in ‘Ouachita’ blackberries


Edgley, M and Close, DC and Measham, PF, Nitrogen application rate and harvest date affect red drupelet reversion and postharvest quality in Ouachita' blackberries, Scientia Horticulturae, 256 Article 108543. ISSN 0304-4238 (2019) [Refereed Article]

Copyright Statement

Crown Copyright © 2019 Published by Elsevier B.V. All rights reserved.

DOI: doi:10.1016/j.scienta.2019.108543


Red drupelet reversion (RDR) is a postharvest physiological disorder in blackberries that causes fruit that is black at harvest to subsequently turn red. This trial aimed to investigate the effects of nitrogen (N) fertiliser application rate on the expression of RDR and postharvest fruit quality.

Nitrogen was applied weekly during the growing period via fertigation at a low, medium, and high rates (53, 106, and 212 kg N ha−1 respectively) to ‘Ouachita’ blackberries in 2016 and 2017. Yield, RDR, and postharvest quality were assessed. Harvest date, N application rate, and fruit mass were significant factors in the postharvest expression of RDR. In both years, fruit from the high N treatment exhibited significantly increased incidence and severity of RDR relative to the other two N application rates. Fruit temperatures during harvest of more than 23 °C were associated with higher incidence and severity of RDR in 2017, and smaller fruit were more likely to have no RDR in both years. The high N treatment produced more fruit than the low N treatment in 2016, and more and heavier fruit than both other treatments in 2017.

Item Details

Item Type:Refereed Article
Keywords:fertigation, red drupelet disorder, temperature, firmness
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Horticultural production
Research Field:Horticultural crop growth and development
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural crops
Objective Field:Berry fruit (excl. kiwifruit)
UTAS Author:Edgley, M (Mr Max Edgley)
UTAS Author:Close, DC (Professor Dugald Close)
UTAS Author:Measham, PF (Dr Penny Measham)
ID Code:136788
Year Published:2019
Web of Science® Times Cited:5
Deposited By:TIA - Research Institute
Deposited On:2020-01-17
Last Modified:2020-04-30

Repository Staff Only: item control page