The peat is used as the high quality substrate in professional horticulture. However currently a large portion of this material was extracted from the bog directly which is harmful to the biodiversity and climate regulation. The cultivation of Sphagnum biomass artificially may provide such an altern...
The peat is used as the high quality substrate in professional horticulture. However currently a large portion of this material was extracted from the bog directly which is harmful to the biodiversity and climate regulation. The cultivation of Sphagnum biomass artificially may provide such an alternative to this situation. A submerged air-floating system was established as a simple and effective culture system to produce large amount of propagules of Sphagnum (Sphagnum palustre) in a short period. The effect of explants types (capitulum branch, stem branch), media (standard fertilizer medium, basic Murashige and Skoog medium and a commercial fertilizer), and different concentrations of indolebutyric acid (IBA) (0, 0.01, 0.05, 0.1, 0.2 and 0.5 mg/l) were studied. The fragments originating from capitulum branches cultured in the standard fertilizer medium (SF) showed a higher rate of fragment regeneration than those cultured under other conditions. In addition, the exogenous IBA at a concentration of 0.1 mg/l could enhance the regeneration and growth of the fragments. Two different types of inocula (fragments and capitula) were used in the greenhouse transplantation experiment. The fragments produced in the novel regeneration system showed a significant higher reproduction rate and dry mass than the capitula, which shows great potential to be used in Sphagnum moss farming in the future. Eight different culture substrates (sponge, coarse sand, coconut fiber, saw, yellow sand, foam and full peat as control) were selected to evaluate their effect on the growth and establishment of Sphagnum. Volume ratio of peat:substrate was set as 7:8. When the Sphagnum was harvested, the relative coverage increase ranged from 2 to 14 times. There were also significant difference on the dry weight and the capitula increase among the 8 substrates. The saw substrate was found to be the best media for growth and regeneration of Sphagnum, Where the Sphagnum palustre had the highest relative coverage increase (14 times) and also somewhat greater mean biomass and capitula increase (about 14 g of dry weight and 800 of capitula) than other substrate. Coconut fiber was to show inhibit both of the growth and regeneration of Sphagnum significantly (2 times of relative coverage increase, 3g of dry weight and 50 of capitula). After the optimum substrate was selected, a set of volume ratios less than 7:8 (1:14, 3:12 and 5:10 respectively) were set for further test in order to save the usage of peat. There was significant difference on the Sphagnum growth and regeneration between different volume ratios of peat:saw. More Sphagnum growth and regeneration was found on the ratios of 5:10 and 7:8 than much less ratios (1:14 and 3:12) and control. Even though, the length increment of Sphagnum was much higher on the ratio of 7:8 and control (full peat) than other tested volume ratios, which seems to show that the best volume ratio of peat:saw was 7:8. The effects of fertilizer application with a time interval on the growth of Sphagnum propagules were tested. One is a commercial fertilizer and another is the standard nutrient. Fertilization with the commercial fertilizer had significant better effect on the dynamic change of relative coverage increase than fertilization with standard fertilizer and only with water. The optimum time interval for fertilization seemed as 5 days per time. However, further experiment is needed to compare the regeneration success of other types of exogenous hormones and the appropriate ratio of different hormones. Furthermore, other optimal environment factors influencing the production of propagules like the light density, temperature and transplantation season also need to be discussed.
The peat is used as the high quality substrate in professional horticulture. However currently a large portion of this material was extracted from the bog directly which is harmful to the biodiversity and climate regulation. The cultivation of Sphagnum biomass artificially may provide such an alternative to this situation. A submerged air-floating system was established as a simple and effective culture system to produce large amount of propagules of Sphagnum (Sphagnum palustre) in a short period. The effect of explants types (capitulum branch, stem branch), media (standard fertilizer medium, basic Murashige and Skoog medium and a commercial fertilizer), and different concentrations of indolebutyric acid (IBA) (0, 0.01, 0.05, 0.1, 0.2 and 0.5 mg/l) were studied. The fragments originating from capitulum branches cultured in the standard fertilizer medium (SF) showed a higher rate of fragment regeneration than those cultured under other conditions. In addition, the exogenous IBA at a concentration of 0.1 mg/l could enhance the regeneration and growth of the fragments. Two different types of inocula (fragments and capitula) were used in the greenhouse transplantation experiment. The fragments produced in the novel regeneration system showed a significant higher reproduction rate and dry mass than the capitula, which shows great potential to be used in Sphagnum moss farming in the future. Eight different culture substrates (sponge, coarse sand, coconut fiber, saw, yellow sand, foam and full peat as control) were selected to evaluate their effect on the growth and establishment of Sphagnum. Volume ratio of peat:substrate was set as 7:8. When the Sphagnum was harvested, the relative coverage increase ranged from 2 to 14 times. There were also significant difference on the dry weight and the capitula increase among the 8 substrates. The saw substrate was found to be the best media for growth and regeneration of Sphagnum, Where the Sphagnum palustre had the highest relative coverage increase (14 times) and also somewhat greater mean biomass and capitula increase (about 14 g of dry weight and 800 of capitula) than other substrate. Coconut fiber was to show inhibit both of the growth and regeneration of Sphagnum significantly (2 times of relative coverage increase, 3g of dry weight and 50 of capitula). After the optimum substrate was selected, a set of volume ratios less than 7:8 (1:14, 3:12 and 5:10 respectively) were set for further test in order to save the usage of peat. There was significant difference on the Sphagnum growth and regeneration between different volume ratios of peat:saw. More Sphagnum growth and regeneration was found on the ratios of 5:10 and 7:8 than much less ratios (1:14 and 3:12) and control. Even though, the length increment of Sphagnum was much higher on the ratio of 7:8 and control (full peat) than other tested volume ratios, which seems to show that the best volume ratio of peat:saw was 7:8. The effects of fertilizer application with a time interval on the growth of Sphagnum propagules were tested. One is a commercial fertilizer and another is the standard nutrient. Fertilization with the commercial fertilizer had significant better effect on the dynamic change of relative coverage increase than fertilization with standard fertilizer and only with water. The optimum time interval for fertilization seemed as 5 days per time. However, further experiment is needed to compare the regeneration success of other types of exogenous hormones and the appropriate ratio of different hormones. Furthermore, other optimal environment factors influencing the production of propagules like the light density, temperature and transplantation season also need to be discussed.
주제어
#Novel system Sphagnum palustre Fertilizer Culture substrate Propagules production
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