Keletas puikių šaltinių apie heliamforų auginimą:
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John Brittnacher wrote:
Heliamphora requires fertilization to grow well. With the recommended neutral, minimal-organic soil mixtures something has to be done to help the plants grow. The plants can be sprayed with a fertilizer solution, a fertilizer solution can be put into the pitchers, the plants can be watered with a fertilizer solution, and fertilizer pellets can be added to the soil. I find it is best to use fertilizers with a high ratio of nitrogen to other nutrients but low in or with no urea nitrogen. Urea is not directly usable by plants and needs to be broken down by bacteria to be effective. Nitrate-based fertilizers make all the nutrients immediately available, so care needs to be taken not to use too much at one time.
Heliamphora, like Sarracenia, is quite capable of utilizing nutrients in the soil although Heliamphora can not tolerate the fertilizer levels that Sarracenia appreciates. Commercial carnivore growers put very small amounts of fertilizer in their water - on the order of 1/2 tsp fertilizer per 10 gallons (1 g per 40 l) of water. This will raise the TDS (total dissolved solids) in the water by 25 parts per million. I have used 19-6-12 Osmocote™ pellets in the soil. Usually, depending on the species and size of the plant, 1 to 4 pellets per plant works well. However, use of fertilizer pellets can be tricky in the loose soils recommended for Heliamphora. Some species are more sensitive to soil fertilization than others so be VERY careful if you go this route. If the roots get burned by the fertilizer it could result in the death of the plant.
For plants that have adult pitchers, in-the-pitcher feeding is the best option. A solution of 1/2 tsp per gallon (1 cc per 2 l) of a 20-14-13, urea free water soluble orchid fertilizer or a 16-16-16 fertilizer containing some kelp extract in pure water about once a month are recommended by a number of growers. Do not overfill the pitchers so that in-the-pitcher feeding becomes soil fertilization. Keep in mind that 1/2 tsp per gallon of water will raise the TDS by 350 parts per million. That plus any salts in the water to start with is much too strong for Heliamphora soil fertilization. If you want to be safe, dilute the 350 ppm stock solution with 4 parts water to get 70 ppm. Generally 70 ppm is safe in the soil if you top water your plants well a few times between fertilizations.
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