Công thức Pha Dung Dich Dinh Dưỡng Thủy Canh

Từng viết bởi duyhai108

   Tài Liệu ở đây nguyên gốc tiếng Anh.Các bạn ở diễn đàn ai có điều kiện,dịch ra cho bà con tham khảo thêm....Chúc vui vẻ.

Hydroponic Tips!
1. The rockwool can be difficult to cut with a cork borer. It cuts much easier and cleaner if you cut the rockwool while it is soaking in water or nutrient solution.
2. Some individual rockwool slabs appear to have high salt contamination. Soaking and rinsing in water prior to planting should alleviate this problem.
3. Individual seeds can be easily planted by touching the seed with the wet tip of a pencil or sharp stick.
4. To get good germination, the rockwool must be thoroughly wetted before or right after planting the seed. If you cut it out in solution then it will already be thoroughly wetted.
5. Water level is crucial for good germination. We find that the germination is best 1.5 to 2 cm below the seed level. If the water level is too high, the seeds become too wet and won't germinate properly. If the water level is too low, the water level will drop below the plugs and will dry out causing poor germination or seedling death. Once roots extend into solution, it is desirable to let the solution drop below the plugs. This will help reduce potential algae growth on the plugs without adverse affects on plant growth.
6. To prevent algae build up on top of the rockwool plugs, sprinkle a little bit of supersoil (dark soil mix) on top of the rockwool. This will cut out the light and completely inhibit algae growth.
7. We regularly us continuous aeration with aeration stones.
8. The rockwool plugs can slip down into the solution. Some people use cut off 15 mL Falcon tubes with enough of the cone edge at the bottom to add support for the plug so that it doesn't fall through.
9. You can also grow lots of plants on a thin slab for screening purposes.
10. How to make Gibeaut's solution. Note: the macronutrient stock solutions are kept in separate containers. The Fe stock solution is kept in aluminum-foil-covered or dark-brown bottle to prevent light degradation. The micronutrient stock solution is a mixture of all micronutrients combined together in one container. Be sure to make with distilled-deionized water.After making the complete Gibeaut's solution, the pH will be quite high and must be adjusted to approximately 6.0 with 10 M HNO₃. A general rule of thumb is to change the solution when it goes above pH 7.0 or add HNO₃ to reduce pH back to pH 6.0.

Gib Macronutrients

FW

[STOCK]

STOCK 
(g/L)

mL (solution)/
L (water)

Ca(NO₃)₂ x 4H₂O

236.15

1M

236.15

1.50

KNO₃

101.11

1M

101.11

1.25

Mg(SO₄) x 7H₂O

246.48

1M

246.48

0.75

KH₂PO₄

136.09

1M

136.09

0.50

Na₂O₃Si x 9H₂O

284.20

0.1M

28.420

1.00

Fe (Sprint 330)

10% (w/w)

0.072 M

40.0

1.00

Gib Micronutrients

KCl

74.56

50mM

3.728

1.00

MnSO₄ x H₂O

169.01

10mM

1.690

CuSO₄ x 5H₂O

249.68

1.5mM

0.375

ZnSO₄ x 7H₂O

287.54

2mM

0.575

H₃BO₃

61.83

50mM

3.092

(NH₄)₆Mo₇O₂₄

1235.9

0.075mM

0.093

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LITERATURE CITED

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