Effect of Different Commercial Fertilizers, Harvest Date, and Storage Time on Two Organically Grown Blackberry Cultivars: Physicochemical Properties, Antioxidant Properties, and Sugar Profiles

Table 1

Total phenolic content and monomeric anthocyanins at harvest for cultivars “Obsidian” and “Triple Crown,” 2012 harvest.

	Fish emulsion/hydrolysate blend	Soy meal	Processed poultry litter
TPC (mg GAE/g)
Obsidian
Early harvest	A3.31 ± 0.08^a	B3.86 ± 0.10^a	B4.05 ± 0.21^a
Middle harvest	A4.21 ± 0.02^a	B5.55 ± 0.15^b	A4.30 ± 0.15^b
Late harvest	A4.85 ± 0.23^c	B4.59 ± 0.06^c	C3.54 ± 0.11^c
Triple crown
Early harvest	A3.030 ± 0.07^a	B3.76 ± 0.14^a	C3.42 ± 0.06^a
Middle harvest	A2.96 ± 0.07^a	B3.81 ± 0.09^a	C4.39 ± 0.12^b
Late harvest	A3.55 ± 0.18^b	B2.89 ± 0.05^b	C2.71 ± 0.05^c
TMA(mg/g)
Obsidian
Early harvest	A2.28 ± 0.11^a	A2.51 ± 0.14^a	A2.45 ± 0.11^a
Middle harvest	A3.16 ± 0.20^b	B3.51 ± 0.24^b	C3.10 ± 0.19^b
Late harvest	A3.17 ± 0.22^b	B3.11 ± 0.21^c	B2.56 ± 0.16^a
Triple crown
Early harvest	A1.89 ± 0.00^a	A1.93 ± 0.08^a	A2.08 ± 0.08^a
Middle harvest	A2.39 ± 0.08^b	B2.10 ± 0.03^b	B2.14 ± 0.04^a
Late harvest	A2.65 ± 0.02^b	A2.57 ± 0.03^c	B2.57 ± 0.05^b

TPC: total phenolic content; TMA: total monomeric anthocyanins. Mean values ± SD, n = 3. Values preceded with the same capital letters (A–C) within the same row of a given table are not statistically different (α ≤ 0.05). Within a given cultivar and phenolic determination method, values followed with the same lowercase letters (a–c) within the same column of a given table are not statistically different (α ≤ 0.05).