Articles
FERTILIZATION STRATEGIES IN THE BLACKCURRANT CULTIVAR ‘BEN TRON’ (RIBES NIGRUM L.)
Article number
585_105
Pages
639 – 643
Language
English
Abstract
The Scottish blackcurrant cultivar Ben Tron (ND12/26 x ((Vistavotnjaja x (Mendip Cross x R. dikuscha) x (Goliath x Øjebyn)) x Westra) has become a popular cultivar in the Norwegian blackcurrant industry.
It is high yielding with an erect growth habit, good fruit quality and complete field resistance to mildew (Sphaerotheca mors-uvae) when grown in Norway.
A fertilization experiment with different strategies and rates of N, P and K was established at Apelsvoll Research Centre Division Kise, Norway (60o 40′ N; 10o 11′ E) in 1991. The experimental field was fitted with a pressure compensated trickle irrigating system with an emitter spacing of 50 cm and a capacity of 1.6 l/h.
The field was irrigated whenever the water deficit exceeded 10 mm.
The plots were either fertigated, broadcast fertilized or a combination of the two techniques was used.
Broadcasting was performed either in early spring or in autumn, while fertigation was carried out from the last week of May until early August.
Records of yield, berry and cluster size, soluble solids and concentration of N, P and K in leaf dry matter have been collected over eight seasons.
Due to low concentrations of N, P and K in samples of leaves, the rates of fertilization was increased 20 % after five years.
Fertigation affected yield significantly in mean of all years.
Using a low rate of fertilization (N=12.5 (15.0) kg/ha, P=3.3 (4.0) kg/ha, K=10.0 (12.0) kg/ha) the average yield was 38 % higher in fertigated plots compared to plots given the same rate of fertilizer broadcast in early spring.
A low rate of fertilization broadcast in autumn also gave a greater yield than fertilizing in spring.
When the plots were fertilized at a medium rate (N=25.0 (30.0) kg/ha, P=6.6 (8.0) kg/ha, K=20.0 (24.0) kg/ha), the highest yield was obtained after a combination of fertigation and broadcasting in autumn.
The greatest yield was, however, obtained using the highest rate (N=37.5 (45.0) kg/ha, P=9.9 (12.0) kg/ha, K=30.0 (36.0) kg/ha) by a combination of broadcasting in early spring, fertigation and broadcasting in autumn.
The effects on berry size by different rates and techniques of fertilization corresponded closely with the effects on yield.
The content of soluble solids in the berries was little affected by the different rates and strategies of fertilization.
Fertigation gave a higher DM concentration of N in the leaves than broadcasting at both low and medium rates.
It is high yielding with an erect growth habit, good fruit quality and complete field resistance to mildew (Sphaerotheca mors-uvae) when grown in Norway.
A fertilization experiment with different strategies and rates of N, P and K was established at Apelsvoll Research Centre Division Kise, Norway (60o 40′ N; 10o 11′ E) in 1991. The experimental field was fitted with a pressure compensated trickle irrigating system with an emitter spacing of 50 cm and a capacity of 1.6 l/h.
The field was irrigated whenever the water deficit exceeded 10 mm.
The plots were either fertigated, broadcast fertilized or a combination of the two techniques was used.
Broadcasting was performed either in early spring or in autumn, while fertigation was carried out from the last week of May until early August.
Records of yield, berry and cluster size, soluble solids and concentration of N, P and K in leaf dry matter have been collected over eight seasons.
Due to low concentrations of N, P and K in samples of leaves, the rates of fertilization was increased 20 % after five years.
Fertigation affected yield significantly in mean of all years.
Using a low rate of fertilization (N=12.5 (15.0) kg/ha, P=3.3 (4.0) kg/ha, K=10.0 (12.0) kg/ha) the average yield was 38 % higher in fertigated plots compared to plots given the same rate of fertilizer broadcast in early spring.
A low rate of fertilization broadcast in autumn also gave a greater yield than fertilizing in spring.
When the plots were fertilized at a medium rate (N=25.0 (30.0) kg/ha, P=6.6 (8.0) kg/ha, K=20.0 (24.0) kg/ha), the highest yield was obtained after a combination of fertigation and broadcasting in autumn.
The greatest yield was, however, obtained using the highest rate (N=37.5 (45.0) kg/ha, P=9.9 (12.0) kg/ha, K=30.0 (36.0) kg/ha) by a combination of broadcasting in early spring, fertigation and broadcasting in autumn.
The effects on berry size by different rates and techniques of fertilization corresponded closely with the effects on yield.
The content of soluble solids in the berries was little affected by the different rates and strategies of fertilization.
Fertigation gave a higher DM concentration of N in the leaves than broadcasting at both low and medium rates.
Publication
Authors
A. Nes, J. Skaug, B. Hageberg
Keywords
Blackcurrant, fertilization, fertigation, soluble solids, yield
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