Cluster Management to Improve Berry Quality in Young ‘Alborz’ Table Grape in the Intermountain West Region, USA

Figures & data

Table 1. The influence of cluster management regimes on yield and berry weight in ‘Alborz’ seedless grape.

	Yield (kg/vine)					Average berry weight (g/berry)
Cluster management^z	2012	2013	2014	3-year total (kg/vine)	3-year average (kg/vine)	2012	2013	2014	First harvest avg. all year	Second harvest avg. all year	Grand avg. all year
NoClRemNoClShort	22.38a	15.33a	32.31a	70.02a	23.34a	2.63b	2.65c	3.05b	3.00c	2.79b	2.85c
NoClRembutClShort	19.08a	11.21bc	2678b	57.08b	19.02b	3.62a	2.90bc	3.41ab	3.28bc	3.35a	3.36b
ClRembutNoClShort	15.36a	11.14c	20.68c	47.19b	15.73b	3.50ab	3.00bc	3.49a	3.46ab	3.23ab	3.31b
ClRem&ClShort	16.68a	9.49c	19.45c	45.64b	15.20b	3.60a	3.26b	3.72a	3.59ab	3.39a	3.43ab
ClRemShort&Gird	14.68a	14.48ab	25.81b	54.98b	18.32b	3.88a	3.83a	3.57a	3.89a	3.70a	3.77a

Note. ^zAbbreviations: NoClRemNoClShort = no cluster removal and no cluster shortening (Control); NoClRembutClShort = no cluster removal but clusters shortening; ClRembutNoClShort = cluster removal but no cluster shortening; ClRem&ClShort = cluster removal and cluster shortening; ClRemShort&Gird = clusters removal, shortened, and vine girdled.

^yMeans within columns followed by different letters are significantly different at 5%, using Fisher’s Protected Least Significant Difference.

Table 2. The influence of cluster management regimes on length and weight of cluster in ‘Alborz’ seedless grape.

	Cluster length in 3 years (cm)						Cluster weight in 3 years (g)
Cluster management^z	2012	2013	2014	Avg. all years first harvest (cm)	Avg. all years second harvest (cm)	Avg. both harvests over all years (cm)	2012	2013	2014	Avg. all years first harvest (g)	Avg. all years second harvest (g)	Avg. both harvests over all years (g)
NoClRemNoClShort	27.67b^y	27.37a	30.15a	27.37a	30.07a	28.68a	450.4bc	433.5bc	575.6c	489.5b	1756.7a	488.6c
NoClRembutClShort	23.87c	20.97b	22.78b	21.18b	23.00b	22.00b	499.1abc	357.7c	695.8bc	622.9b	1802.5a	518.6c
ClRembutNoClShort	30.57a	28.90a	30.66a	28.88a	30.62a	29.76a	565.0a	457.1b	866.1ab	659.8ab	2429.6a	633.2ab
ClRem&ClShort	21.40c	22.57b	23.73b	22.57b	23.70b	23.05b	425.4c	393.6bc	866.6ab	636.2ab	1995.1a	569.9bc
ClRemShort&Gird	22.57c	20.88b	24.37b	21.35b	24.13b	22.58b	544.4ab	594.8a	958.5a	809.0a	2342.9a	708.4a

Note. ^zAbbreviations: NoClRemNoClShort = no cluster removal and no cluster shortening (Control); NoClRembutClShort = no cluster removal but clusters shortening; ClRembutNoClShort = cluster removal but no cluster shortening; ClRem&ClShort = cluster removal and cluster shortening; ClRemShort&Gird = clusters removal, shortened, and vine girdled.

^yMeans within columns followed by different letters are significantly different at 5%, using Fisher’s Protected Least Significant Difference.

Table 3. The influence of cluster management regimes on berry color and soluble solids concentration in ‘Alborz’ seedless grape.

	Berry color in 3 years (1–5 scale)^x						Berry soluble solids concentration in 3 years (%)
Cluster management^z	2012	2013	2014	Avg. all years first harvest	Avg. all years second harvest	Avg. both harvests over all years	2012	2013	2014	Avg. all years first harvest (%)	Avg. all years second harvest (%)	Avg. both harvests over all years(%)
NoClRemNoClShort	3.75a^y	2.39a	2.31c	2.31b	2.89b	2.63b	18.25a	19.12a	17.03cd	18.62a	18.81bc	18.11b
NoClRembutClShort	3.88a	2.39a	3.31b	2.69ab	3.34ab	3.06ab	18.87a	19.00a	18.14bc	18.247a	19.72abc	18.63ab
ClRembutNoClShort	3.95a	2.35a	3.72ab	2.84ab	3.61a	3.22ab	18.74a	18.94a	19.40ab	18.39a	19.99ab	19.08ab
ClRem&ClShort	4.08a	2.50a	3.98a	3.19a	3.50a	3.40a	18.87a	19.75a	19.57a	19.30a	20.32a	19.50a
ClRemShort&Gird	3.54a	3.02a	3.33b	3.22a	3.27ab	3.25ab	18.63a	18.55a	16.72d	18.22a	18.53c	17.83b

Note. ^zAbbreviations: NoClRemNoClShort = no cluster removal and no cluster shortening (Control); NoClRembutClShort = no cluster removal but clusters shortening; ClRembutNoClShort = cluster removal but no cluster shortening; ClRem&ClShort = cluster removal and cluster shortening; ClRemShort&Gird = clusters removal, shortened, and vine girdled.

^yMeans within columns followed by different letters are significantly different at 5%, using Fisher’s Protected Least Significant Difference.

^xColor scale ranging from 1 = greenest to 5 = most red.