Articles
EFFECTS OF FERTIGATION OF THE BLACK CURRANT CULTIVAR “BEN TRON” (Ribes nigrum I.)
Article number
505_57
Pages
409 – 414
Language
Abstract
The Scottish black currant cultivar "Ben Tron" (ND12/26 x ((Vistavotnjaja x (Mendip Cross x R. dikuscha) x (Goliath x Ojebyn)) x Westra) is high-yielding with an erect growth habit, good fruit quality and complete field resistance to mildew (Sphaeroteca mors-uvae) when grown in Norway.
A fertilizer experiment with different rates of N, P and K, methods and timing of fertilizing was established at Apelsvoll Research Centre Division Kise, Norway (60° 40′ N; 10° 11′ E) in 1991. Records of yield, berry and cluster size, soluble solids and concentration of N, P and K in leaf dry matter were collected over 5 seasons.
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 methods 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.
The bushes were planted with a spacing of 1.5 m in rows 4.0 m apart.
Grass that was kept short covered the alleyways, combined with a herbicide strip 1.0 m wide in the rows.
All fertilizer was applied only to the herbicide strip, and only 25 % of the total area was therefore fertilized.
Fertigation affected yield significantly in all years.
Using a low rate of fertilization (N=12.5 kg/ha, P=3.3 kg/ha, K=10.0 kg/ha) the average yield was 38 % higher in fertigated plots compared to plots given the same amount 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 of fertilization (N=25.0 kg/ha, P=6.6 kg/ha, K=20.0 kg/ha), the highest yield was obtained after a combination of fertigating and broadcasting in autumn.
The greatest yield was, however, obtained using the highest rate of fertilization (N=37.5 kg/ha, P=9.9 kg/ha, K=30.0 kg/ha) by a combination of broadcasting in early spring, fertigation and broadcasting in autumn.
The effects on berry size by different rates and methods 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 methods of fertilization.
Fertigation gave a higher DM concentration of N in the leaves than broadcasting at both low and medium rates.
A fertilizer experiment with different rates of N, P and K, methods and timing of fertilizing was established at Apelsvoll Research Centre Division Kise, Norway (60° 40′ N; 10° 11′ E) in 1991. Records of yield, berry and cluster size, soluble solids and concentration of N, P and K in leaf dry matter were collected over 5 seasons.
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 methods 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.
The bushes were planted with a spacing of 1.5 m in rows 4.0 m apart.
Grass that was kept short covered the alleyways, combined with a herbicide strip 1.0 m wide in the rows.
All fertilizer was applied only to the herbicide strip, and only 25 % of the total area was therefore fertilized.
Fertigation affected yield significantly in all years.
Using a low rate of fertilization (N=12.5 kg/ha, P=3.3 kg/ha, K=10.0 kg/ha) the average yield was 38 % higher in fertigated plots compared to plots given the same amount 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 of fertilization (N=25.0 kg/ha, P=6.6 kg/ha, K=20.0 kg/ha), the highest yield was obtained after a combination of fertigating and broadcasting in autumn.
The greatest yield was, however, obtained using the highest rate of fertilization (N=37.5 kg/ha, P=9.9 kg/ha, K=30.0 kg/ha) by a combination of broadcasting in early spring, fertigation and broadcasting in autumn.
The effects on berry size by different rates and methods 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 methods of fertilization.
Fertigation gave a higher DM concentration of N in the leaves than broadcasting at both low and medium rates.
Publication
Authors
K.L. Kongsrud, A. Nes
Keywords
Black Currant, fertilization, fertigation, soluble solids, yield
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