ayo belajar hidroponik lagi
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Edisi belajar Hidroponik dari Buku “Hydroponic Food Production”
Terutama Water Culture yg mau saya terapkan untuk sistem semai dan remaja.
1. Membersihkan bisa pakai Cairan Pemutih Pakaian dengan takaran 10%. ( Contoh Bayclin desifektan )
” Pythium infection of roots causes stunting of plants (Figure 5.3). Ultraviolet sterilization of nutrient solutions does not combat this disease organism.
It can be controlled only by sterilization between crops of all beds, pipes, tanks, and so on with a 10% bleach solution.”
2. Pen Sterilan pakai Lampu Ultra Violet, bisa membunuh beberapa fungi.
” Evaluation of the effectiveness of a UV sterilizer against selected species of pathogenic and nonpathogenic fungi commonly associated with greenhouse crops by Mohyuddin in 1985 demonstrated that the unit significantly reduced or eliminated the following fungi from an aqueous solution: Botrytis cinerea, Cladosporium sp., Fusarium spp., Sclerotinia sclerotiorum, Verticillium albo-atrum, and several others.”
3. Tapi sinar Ultra Violet akan menurunkan unsur nutrisi, seperti boron, mangan dan besi.
” One side effect of the use of UV sterilizers is their effect on a few of the micronutrients. Mohyuddin (1985) found that the boron and manganese contents in a nutrient solution were reduced by more than 20% over a period of 24 h of sterilization. The most significant effect was on iron, which was precipitated as hydrous ferric oxide.
Nearly 100% of the iron was affected.
The iron precipitate coated lines and the quartz sleeve of the sterilizer, thereby reducing the UV transmission.
Such precipitate could be removed with a filter.
Hydrogen peroxide injection before passing the solution through the UV sterilizer also improves effectiveness.
However, the loss of iron from the nutrient solution during UV sterilization must be corrected downstream by the addition of iron chelate.”
4. PH perlu di cek setiap waktu, sebaiknya pakai alat penyetabil pH dan EC dengan komputer.
5. PH bisa di kendalikan menggunakan Asam Nitrat (HNO3), Asam Sulfat (H2SO4), Asam Fosfor (H3PO4) atau Potasium Hidroksida (KOH)
” The pH and electrical conductivity (EC) are monitored with sensors in the return line. Automatic injection of nitric acid (HNO3), sulfuric acid (H2SO4), phosphoric acid (H3PO4), or potassium hydroxide (KOH) is used to adjust the pH. All of these variables are monitored and adjusted by a computer controller such as Argus or Priva (Appendix 2). Similarly, the EC is raised by injection of calcium nitrate and a mixture of the remaining nutrients from two separate stock concentrate tanks (Figure 5.2) to keep it at 1.2–1.3 mmhos. ”
6. Jika ingin menanam Lettuce di daerah Tropis, sebaiknya Tandon Air di beri pendingin, agar Air Nutrisi stabil di 18C-23C.
Supaya tidak Bolting.
Dengan membuat suhu 18C akan memperlambat Bolting sampai 3-4 hari dan mengurangi infeksi phythium.
“It is also now standard practice when growing lettuce in a raft culture system to use a water chiller in the nutrient tank (Figure 5.2) to maintain the temperature of the nutrient solution between 65°F and 75°F (18°C–23°C). This cooling of the nutrient solution will delay bolting of lettuce ( lettuce going to seed) in desert and tropical regions.”
7. Papan Rakit/Raft di setiap penanaman, harus di bersihkan dengan di semprot air.
Lalu di rendam dalam Air yg di campur Pemutih dengan konsentrasi 10%.
“Between crops, the boards must be cleaned and sterilized by hosing with water before dipping them in a 10% bleach solution. Similarly, the beds must be drained and cleaned after each harvest (Figure 5.11).
A new nutrient solution is prepared in the bed after cleaning and is ready for transplanting the same day.”
8. Beds/Tempat Bak Rakit Apung, di bersihkan setiap penanaman.
Jika bisa Bak nya di sikat saat membersihkan nya. smile emotikon