The SANBIO ferti-activators can control biotic and abiotic stress and have positive impact to vegetative and resistive processes.
The aim of this study is to evaluate the effects of simultaneous use of SANBIO ferti-activators EPSOMIT and PLANTA on productivity and quality of citrus variety ´Washington Navel´.
This project is being carried out within the collaboration between the Laboratory of Plant Genetics and Molecular Biology, Department of Biotechnology and Plant Sciences, National Agronomic Institute of Tunisia, the Centre technique des Agrumes, the grower CITRUMED and SANBOS GmbH, Germany.
1. Materials and methods
Table 1. Basic data
| Season | 2016 |
| Location | Tunisia, Bouargoub  Picture 1: Orchad |
| Responsible organization | Laboratory of Plant Genetics and Molecular Biology, Department of Biotechnology and Plant SciencesNational Agronomic Institute of TunisiaCITRUMED |
| Crop | Citrus |
| Variety | Washington Navel |
| Trial field | 1 block system, 180 ha |
| Pesticides | none |
| Irrigation | drip irrigation |
| Test product | Sanbio EPSOMIT / PLANTA, manufactured by SANBOS GmbH, Germany |
| Application | 1.5 kg SANBIO PLANTA + 500L water per ha, soil application 1 kg SANBIO EPSOMIT + 500L water per ha, foliar application, 14 days later |
| Date of planting | 1990 |
| Date of application | 05/2015 |
| Date of harvest | 09/2015 |
| Scoring | Yield, caliber, quality |
2. Results
Table 2. Productive performance on variety ´Washington Navel´
Parameter |
Unit |
Control |
SANBIO |
Trend |
||||
0 |
1 |
2 |
0 |
1 |
2 |
|||
Fruit weight total |
kg |
1030.34 |
905.60 |
942.70 |
1456.83 |
1053.86 |
1655.23 |
|
Average |
kg |
959.55 |
1388.64 |
+45% |
||||
Juice weight |
kg |
479.68 |
417.87 |
405,50 |
636.81 |
500.85 |
755.15 |
|
Average |
kg |
434.35 |
630.94 |
+45% |
||||
Juice volume |
L |
474 |
419 |
405 |
645 |
482 |
747 |
|
Average |
L |
432.67 |
624.67 |
+44% |
||||
Juice volume / fruit weight total |
% |
46.00 |
46.27 |
42,96 |
44.27 |
45.74 |
45.13 |
|
Brix |
% |
12.5 |
12.9 |
12,9 |
12.6 |
13.20 |
12.20 |
|
Average |
% |
12.77 |
12.67 |
-1% |
||||
NaOH |
12.60 |
13.6 |
13,40 |
10.40 |
12.80 |
11.7 |
||
12.97 |
12.97 |
– |
||||||
Acidity |
% |
0.81 |
0.87 |
0,86 |
0.67 |
0.82 |
0.75 |
|
Average |
% |
0.84 |
0.74 |
-12% |
||||
Maturity |
15.50 |
14.82 |
15.04 |
18.93 |
16.11 |
16.29 |
||
15.12 |
17.11 |
+13% |
||||||
Diameter |
cm |
81 |
72 |
75 |
85 |
90 |
87 |
|
cm |
78 |
83 |
79 |
86 |
77 |
101 |
||
cm |
85 |
73 |
74 |
95 |
81 |
88 |
||
cm |
85 |
79 |
86 |
87 |
74 |
92 |
||
Average diameter |
79.2 |
86.9 |
+10% |
|||||
Figure 1. Yield of fruits and juice of citrus variety ´Washington Navel´
Figure 2. Fruit quality of citrus variety ´Washington Navel´
Picture 2-4. Trees and fruits form treated plot
3. Conclusion
To summarize, the present study shows significantly positive effects by use of ferti-activators Sanbio PLANTA and Sanbio EPSOMIT on productive performance of citrus.
The positive effects at glance:
- Significantly higher harvest (fruit weight, juice volume)
- Increase of size of fruits (caliber)
- Better quality of fruits (color, maturity, sugar content, acidity).