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Revistas
Journal of Horticultural Research
Volumen 28 (2020): Edición 2 (December 2020)
Acceso abierto
Production of Soybean Plants for Hydroponic Cultivation from Seedling Cuttings in a Medium Containing
R
hizobium
Inoculum Depending on Various Concentrations of Nutrient Solution and Different Nitrogen Sources
Naoki Hata
Naoki Hata
y
Haruko Futamura
Haruko Futamura
| 06 nov 2020
Journal of Horticultural Research
Volumen 28 (2020): Edición 2 (December 2020)
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Publicado en línea:
06 nov 2020
Páginas:
71 - 82
Recibido:
01 ene 2020
Aceptado:
01 jun 2020
DOI:
https://doi.org/10.2478/johr-2020-0015
Palabras clave
ammonium
,
nitrate
,
urea
,
subirrigation
,
substrate hydroponic system
© 2020 Naoki Hata et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Fig. 1
Overview of a subirrigation system. If the water level in the tray decreases because water is absorbed by plants (1), air enters the plastic bottle through a small hole (2), after which the water level in the bottle decreases as the liquid exits (3), resulting in an increase in the water level in the tray for a depth of about 1 cm (4). After the water level in the tray is restored, air stops entering the bottle and the water level in the bottle stops decreasing
Fig. 2
Spatial distribution of adventitious roots and root nodules on an inoculated soybean plant at 3 weeks after cutting. Some of the nodules are indicated with red arrows
Fig. 3
Differences in the shoots and roots of the inoculated soybean plants treated with various concentrations of the nitrogen-free nutrient solution. Plants were photographed at 3 weeks after cutting. The control plants at both ends were irrigated with either tap water (0%) or the complete nutrient solution without a Rhizobium inoculant (Cont.)
Fig. 4
Effects of the various nitrogen-free nutrient solution concentrations on the main stem length (A), number of trifoliate leaves (B), green leaf color intensity (C), shoot dry weight (D), root dry weight (E), and number of root nodules (F) of the inoculated soybean plants at 3 weeks after cutting. Values represent means ± S.E. (n = 10). Different letters above bars represent significant differences as determined with Tukey-Kramer's multiple range test (p < 0.05)
Fig. 5
Differences in the shoots and roots of inoculated soybean plants treated with various nitrogen forms and nutrient solution concentrations. Plants were photographed at 3 weeks after cutting. For the three images presenting the effects of different nitrogen forms, the control plants at both ends were same and irrigated with tap water (0%) or the complete nutrient solution without a Rhizobium inoculant (Cont.)
Fig. 6
Effects of the nitrogen form and nutrient solution concentration on the main stem length (A), number of trifoliate leaves (B), green leaf color intensity (C), shoot dry weight (D), root dry weight (E), and number of root nodules (F) of the inoculated soybean plants at 3 weeks after cutting. Values represent means ± S.E. (n = 10). Different letters above bars represent significant differences as determined with Tukey-Kramer's multiple range test (p < 0.05)
Composition of standard and modified Enshi nutrient solution with different nitrogen form at a constant total nitrogen of 17.3 mM
Enshi nutrient solution
Chemical composition (mM)
Ca(NO
3
)
2
KNO
3
NaNO
3
NH
4
Cl
NH
4
H
2
PO
4
KH
2
PO
4
K
2
SO
4
CaCl
2
MgSO
4
Standard
8
8
0
0
1.3
0
0
0
2
Modified
NO
3
-N 100%
8
6.7
2.6
0
0
1.3
0
0
2
NH
4
-N 100%
0
0
0
16
1.3
0
4
2
2
Urea-N 100%
0
0
0
0
0
1.3
3.35
4
2
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