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Azolla pinnata

Azolla pinnata. in Japanese : Akakukikusa, Koakaukikusa in Sundanese : Kayu apu dadak in Sumatera : Ganepo in English : water velvet (America) water fern (English) Ferny Azolla (Australia). Benefit of Azolla Can grow on water deficient nitrogen compound

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Azolla pinnata

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  1. Azolla pinnata in Japanese : Akakukikusa, Koakaukikusa in Sundanese : Kayu apu dadak in Sumatera : Ganepo in English : water velvet (America) water fern (English) Ferny Azolla (Australia)

  2. Benefit of Azolla • Can grow on water deficient nitrogen compound • Fix Nitrogen 3-5 kg N/ha/day • (in the tropics: 500-1000 kg N/ha/year) • Biomass doubling time: 2-5 days • Maximum biomass : 30-80 ton fresh weight • 1.5-4.0 ton dry weight • 50-150 kg N/ha • Contain 22-37 crude protein on a dry weight basis • Inoculum 100g/m2 • (20 days: 15-20 ton fresh weight/ha) • Continuous cultur • Harvesting: 22 times/year with the interval of 16 days • cumulative: 200-250 ton fresh weight/ha • In other words: • High Nitrogen content  organic fertilizer • High protein content  feed suplement

  3. Azolla as feed for mule duck Ex. Small farm in Sawangan; 100 mule duck weight: 1.1 kg (20 days) Research: day 21-day 60 (40 days) Control: commercial starter broiler Azolla: Drained for one night (fresh) Table 1. Feed mixture for mule duck No. 1  control No.2  fully recommended No. 3  Still acceptable No. 4  negative valvue (x not recommended)

  4. Growth requirements Temperature : 20-35 oC; Best: 25 oC pH : 3,5 -10,0; best range : 4,5-6,5 Relative humidity : 85-90%; Best : Subtropic, Tropic Dryseason Water level : shallow; Best: 5-10 cm Fertilizer : N, P, K, Ca, Mg, fe, Co, Mo; Main: Phosphorus, low Nitrogen Salinity : sensitive (max: 0.3 ‰) Light intensity : 25-50% Fixation : 40-60 kLux Wind : avoid with hedges, dikes

  5. Pest • Arthropoda Pyralidae Lepidoptera Chironomidae Diptera • Can wreak havoc • Tropic high temperature • High humidity • Limiting factor • Gastropoda • Fungi

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