Hydroponics

..

023264113 E-mail knitthis@kmitl.ac.th

www.kmitl.ac.th/soilkmitl/

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-- - (8 - 12 /)-*** ***

-- -

Hydro - --

-- , ()

-

-****- 40-120 /----

Hydro- - Nitrate----

-

- Hydro , - - 200 /- Hydro-

1. NFT2. PVC DFT3. DFT 4.

1. NFT(Nutrient Film Technique)

NFT

2. DFT(Deep Flow Technique) PVC 2 1/2 4

1/2

DFT PVC 2 1/2

3. DFT(Deep Flow Technique)

1

DFT

5-10 .

4.

Hydroponics 1.

-2.,-3. 50,000 - 1,500,000

1. - , - - ()- 6 .-

. Millimol/liter Milligram/liter(ppm)Sodium Na+ 23.0 0.5 11.5Chlorine Cl- 35.5 1.0 35.5Calcium Ca++ 40.1 2.0 80.2Magnesium Mg++ 24.3 0.5 12.2Sulfate SO4++ 96.1 0.5 48.1Bicarbonate HCO3- 61.0 4.0 244.0

Micromol/liter Microgram/liter(ppb) Iron Fe++ 55.9 0.5 28.0Manganese Mn++ 54.9 10.0 549.0Copper Cu++ 63.5 1.0 63.5Zinc Zn++ 65.4 5.0 327.0Boron B+++ 10.8 25.0 270.0Fluorine F- 19.0 25.0 475.0Electricconductivity

EC 0.5 mS/cm

- .- Tip burn - - - RO - Resin Na

- ()-

- -

- 6 .-----

---- 80 .

-2.,-

NFT, DFT, Substrate-

pH, EC,

-Internet-http://www.kmitl.ac.th/soilkmitl-, -

-3. 50,000 - 1,500,000

NFT DFT

NFT1. 45-50 NFT

1 10-16

2.

3.4.

NFT1.

2. 500,000-1,000,000 3. ? 4. 40-60%5.6.

DFT 1. 20-30 2. 3. 4.5. 6.7.

1.

2.3.

1

1. 2.3.4. 5.

1.2. 3.

Melon

2

NFT DFT

NFT +

Aeroponics

50