1. Authors names: Florin Nețu
 Changes in currant crown management
Authors names: Florin Nețu
Coordinator Professor: ​​ Assoc. Prof. Dr. Adrian Asănică
International Student Symposium "Hortus Academicus“ April 27, Bucharest, Romania

2. Introduction
In the last couple of decades, currant has been one of the most used fruit for its properties , due to its high content of vitamins, micronutrients antioxidants, anthocyanin. Because of this properties when eating currants, we are giving our bodies a natural mechanism to eliminate the free radicals that are the cause of many diseases that cause degeneration and aging of our body.
International Student Symposium "Hortus Academicus“ April 27, Bucharest, Romania

3. vitamin C
antioxidants
flavonoids
micronutrients
anthocyanin

4. International Student Symposium "Hortus Academicus“ April 27, 2018 - Bucharest, Romania

5. Materials and methods
The experiment was set up in the Didactic and Experimental Field of the University of Agronomic Sciences and Veterinary Medicine of Bucharest. The biological material of black and red currant was 6 years old plants of ‘Ellite’ and ‘Tinker’ variety grown as multi-stem shrub.
International Student Symposium "Hortus Academicus“ April 27, Bucharest, Romania

6. There are 3 rows with distances between the rows : 1.2 m
red
Row 2
black
Row 3
b + r
There are 3 rows with distances between the rows : 1.2 m
Distances between plants : 0.8 m
Currant experimental draft
International Student Symposium "Hortus Academicus“ April 27, Bucharest, Romania

7. Bush
Cordons
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8. International Student Symposium "Hortus Academicus“ April 27, 2018 - Bucharest, Romania

9. International Student Symposium "Hortus Academicus“ April 27, 2018 - Bucharest, Romania

10. Trident
Ver. axe
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11. 4 and 5 cordons 6 cordons Bush
International Student Symposium "Hortus Academicus“ April 27, Bucharest, Romania

13. Results and discussions
Difference of growth vigor of ‘Elite’ and ‘Tinker’ varieties based on the training system
Variety
Number of branches/plant
Average height (cm)
Difference
2016
2017
Elite 1 87
126 39
Tinker
138
156 18
Average
112.5
141
28.5 2 88
105 17
127
162 35
107.5
134 26 3
111
108 -3
114
129 15
International Student Symposium "Hortus Academicus“ April 27, Bucharest, Romania

14. Number of branches/plant
Variety
Number of branches/plant
Average height (cm)
Difference
  Average
112.5
118 6
Elite 4
112
Tinker
135
154 19
Average
123.5
136
12.5 5
123
108
-15
166 31
129
137 8
113
133 21 13
bush
107
-22
153
141
-4.5
Red current
109
Black current
134
155
International Student Symposium "Hortus Academicus“ April 27, Bucharest, Romania

15. International Student Symposium "Hortus Academicus“ April 27, 2018 - Bucharest, Romania

16. Number of branches/plant
Variety
Number of branches/plant
Average diameter (mm)
Difference
2016
2017
Elite 1
14.24
15.90
1.66
Tinker
19.99
24.35
4.36
Average
17.11
20.13
3.02 2
13.73
14.09
0.36
19.54
20.54
16.63
17.32
0.69 3
15.95
17.36
1.41
20.81
23.49
2.68
18.38
20.43
2.05 4
19.09
19.90
0.81
20.49
22.42
1.93
International Student Symposium "Hortus Academicus“ April 27, Bucharest, Romania

17. Number of branches/plant
Variety
Number of branches/plant
Average diameter (mm)
Difference
2016
2017
Average
19.79
21.16
1.37
Elite 5
18.36
19.92
1.56
Tinker
20.07
23.14
3.07
19.21
21.53
2.32 6
15.60
19.88
4.28
15.71
21.45
5.74
15.65
20.67
5.02
bush
17.15
18.70
1.55
19.59
21.92
2.33
Media
18.37
20.31
1.94
Red currant
17.88
17.96
0.008
Black currant
16.82
22.47
5.65
International Student Symposium "Hortus Academicus“ April 27, Bucharest, Romania

18. International Student Symposium "Hortus Academicus“ April 27, 2018 - Bucharest, Romania

19. Growing particularities under the influence of the training system
Variety
Number of branches/plant
Average number of spigots in 2017
Average number of annual branches/plant
Number of buds set/plant
Total annual growth of the plants (cm)
2016
2017
Elite 1 2 11 4 6
347
638
Tinker 8 16 20 5
603
948
Average 14 12
475
793 3 13 9
357
562 21 25
684
1308 17
521
935 23 7 74 28
421
1474 34 72
1011
1886 29 73
716
1680
International Student Symposium "Hortus Academicus“ April 27, Bucharest, Romania

20. Number of branches/plant Average number of spigots in 2017
Variety
Number of branches/plant
Average number of spigots in 2017
Average number of annual branches/plant
Number of buds set/plant
Total annual growth of the plants (cm)
2016
2017
Elite 4 21 30 14 90 52
715
1807
Tinker 20 58 5 74
1498
2022
Average 44 9 82 33
1107
1914 23 65 45
972
1074 66 10 40 18
1708
3650 59 53 32
1340
2362 6 35 24
351
1600 15 34
745
2153 7 42 16
548
1877
bush 51 36 84
911
1112 17 73
1610
2713 55 27 79 28
1261
1912
Red currant 31 50 29
582
1181
Black currant 41 11
1123
2097
International Student Symposium "Hortus Academicus“ April 27, Bucharest, Romania

21. International Student Symposium "Hortus Academicus“ April 27, 2018 - Bucharest, Romania

22. Number of cordons/ plant Number of inflorescence/plant
Variety
Number of cordons/ plant
Number of inflorescence/plant
Average number of fruits/ infl
Average weight of a
Average production/ plant (g)
Average production/ cordon
berry
(g)
Elite 1 17
6.8
0.6927 85
Tinker 15
6.1
0.7574
318
Average 16
6.45
0.73
202 2 6
3.62
0.9865 8 28
6.2
1.0109
576
288
4.91
1.00
296
148 3
61.67 10
0.788
1120
373
44.33
8.6
0.8628
744
248 53
9.3
0.83
932
311
International Student Symposium "Hortus Academicus“ April 27, Bucharest, Romania

23. Number of cordons/ plant Number of inflorescence/plant
Variety
Number of cordons/ plant
Number of inflorescence/plant
Average number of fruits/ infl
Average weight of a berry (g)
Average production/ plant (g)
Average production/ cordon
Elite 4 89
10.87
1.0178
2297
Tinker
65.67
8.67
0.8938
1260
315
Average
77.34
9.77
0.96
1778
445 5
97.33
9.75
0.7186
2869
574
72.67
7.3
0.8551
1739
348 85
8.525
0.79
2304
461 6 52
7.55
0.9967
400 67
44.5
6.97
0.7551
374 62
48.25
7.26
0.88
387 65
bush
100.25
8.05
0.724
4385
439
97.93
7.25
0.8321
2301
230
99.09
7.65
0.78
3343
334
Red currant
60.46
8.09
0.85
1596
302.8
Black currant
52.59
1044
258.4
International Student Symposium "Hortus Academicus“ April 27, Bucharest, Romania

24. International Student Symposium "Hortus Academicus“ April 27, 2018 - Bucharest, Romania

25. International Student Symposium "Hortus Academicus“ April 27, 2018 - Bucharest, Romania

26. International Student Symposium "Hortus Academicus“ April 27, 2018 - Bucharest, Romania

27. Conclusions and recommendations
Tallest plants correspond to Vertical axe then Bi baum and the highest increase of cordon thickness to 6 cordons
The highest number and length of annual growths was remarked for 5 cordons training system
Highest average numbers of annual brenches per plant was for bush system
Bigger fruits weight were picked up from Bi baum, followed by 4 cordons system
The bush training system remains the most productive, but the size of a berry it’s smaller than any other training system, except Vertical axe
The vertical systems are very suited for convenient manual picking, fruits quality and easy pruning interventions
International Student Symposium "Hortus Academicus“ April 27, Bucharest, Romania