As a result of the fact that plants cultivated in flower pots have limited spaces from which they get nourishing substances, there must be used an appropriate growing sub layer, especially when plants are planted and replanted. The plants are then fertilized all along their growing process. In our researches, we used L. H. Bailey Begonia rex-cultorum species, a leaf-decorative plant, from the Begoniaceae species. In order to prevent nutrition deficiencies among the main nutritive elements, there were used extraradicular fertilizations with follicular fertilizers for 90 days. The fertilizers that were used were: F411, F141, F231, with two percentages: 0.05% and 0.1%. The administration period is of about 2 week time. Subsequently, there were taken leaves from plants and chemical analysis were made, whose aim was the plants’ supply degree with nutritious elements. Regarding the whole Nitrogen concentration, there are deficiencies of less than 1.8% of the s.u. By using follicular fertilizers with 0.05% concen., Nitrogen deficiency is removed. When fertilizing with F141 and F231, the Nitrogen concen. raises to 2.47%, while fertilizing with F141 and F231, the Nitrogen concen. is deficient. Increasing the concentration to 0.1%, the whole Nitrogen leaf concen. is appropriate, i.e. 3.26% of the s.u., when fertilizing with F411. When using F141 and F231 fertilizers, the Nitrogen concen. is about 2.29%. Unfortunately, there are Phosphorus (P) deficiencies for an appropriate content of about 0.15-0.39% concen. Deficiency is present when using F411 fertilizers, with a 0.05% concen., and a 0.34% P concen. in s.u. This shows a limited value of this chemical element. The Phosphorus (P) concen. is appropriate when F141 and F231 fertilizers are used, with a 0.55, and 0.44% concentration. When the concen. rises to 0.01%, the Phosphorus (P) concen. is appropriate when using follicular fertilizers that follow: F141, F231 and F411. Potassium concen. is deficient, both for unfertilized and fertilized variants with NPK reports. The average ranges between 3.2 and 5.2% K concen. of the s.u. K content reaches 1.88%, when fertilization is made with F411. The highest was obtained when using F231 fertilizer, i.e. 2.22% K concen. Nevertheless, K concen. is poor, even when fertilizer concen. reaches 0.1%. Higher values are only obtained when fertilizing with F231, i.e. 3.10 K concen. As about secondary macro elements content, i.e. Ca, Mg and Fe, the situation is similar to the one of main macro elements content. In order to provide an appropriate nutrition for the Begonia rex-cultorum, we recommend follicular fertilizer with F411, with a 0.1% concen., or a combination of F411 and F141, with a 0.05% concen.
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Jan 14, 2020
N Krishna + 1
Open Access