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- 저자 : Rajasree Nandi (검색결과 4 건)
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Rajasree Nandi,Soma Dey,Mohammed Kamal Hossain 강원대학교 산림과학연구소 2020 Journal of Forest Science Vol. No.
This study was conducted to investigate the effect of different pre-sowing treatments of seeds on germination and growth performance of native threatened tree species Quercus gomeziana A. Camus at the nursery of Chittagong University, Bangladesh. Furthermore, seedling growth attributes under different doses of fertilizer (urea) was also experimented to find the best dose of fertilizer on this tree species at the nursery stage for better field level growth. Seeds were placed to six pre-sowing treatments e.g. control (PT0), treated with sand paper rubbing (PT1), nicking (PT2), seeds immersed in cold water for 48 hours (PT3), seeds immersed in cold water for 7 days (PT4) and seeds sown at propagator house with increased temperature (PT5). It was found from the study that germination was started earlier (at 31 days) in treatments sand paper rubbing (PT1) and nicking (PT2). The highest germination percentage (93%) was in PT1 followed by 86% in seeds immersed in cold water for 7 days (PT4) and 80% in PT0 (control). Germination percentage was observed least (63%) in PT2 even though germination started earlier. For fertilizer dose experiment to seedlings at the nursery level, treatment FT1: 100 kg/ha (0.33679 g urea/pot/seedling) comparing with other treatments FT0: 0 kg/ha (Control), FT2: 200 kg/ha (0.67358 g urea/pot/seedling), FT3: 300 kg/ha (1.01037 g urea/pot/seedling) showed better performance in case of collar diameter (6.74 mm), number of leaves, shoot dry weight (19.74), total dry weight (28.16 g), total fresh weight (67.96 g), volume index (3904.82), sturdiness (127.69). Finally, it can be concluded that Quercus gomeziana seedlings revealed better performances under the treatment FT1 in growth and biomass production. Findings of this study will be helpful to take decision on organic fertilizer dose application to seedlings of Q. gomeziana for large scale plantation and conservation of this species.
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Rajasree Nandi,Soma Dey,Mohammed Kamal Hossain 강원대학교 산림과학연구소 2020 Journal of Forest Science Vol.36 No.1
This study was conducted to investigate the effect of different pre-sowing treatments of seeds on germination and growth performance of native threatened tree species Quercus gomeziana A. Camus at the nursery of Chittagong University, Bangladesh. Furthermore, seedling growth attributes under different doses of fertilizer (urea) was also experimented to find the best dose of fertilizer on this tree species at the nursery stage for better field level growth. Seeds were placed to six pre-sowing treatments e.g. control (PT0), treated with sand paper rubbing (PT1), nicking (PT2), seeds immersed in cold water for 48 hours (PT3), seeds immersed in cold water for 7 days (PT4) and seeds sown at propagator house with increased temperature (PT5). It was found from the study that germination was started earlier (at 31 days) in treatments sand paper rubbing (PT1) and nicking (PT2). The highest germination percentage (93%) was in PT1 followed by 86% in seeds immersed in cold water for 7 days (PT4) and 80% in PT0 (control). Germination percentage was observed least (63%) in PT2 even though germination started earlier. For fertilizer dose experiment to seedlings at the nursery level, treatment FT1: 100 kg/ha (0.33679 g urea/pot/seedling) comparing with other treatments FT0: 0 kg/ha (Control), FT2: 200 kg/ha (0.67358 g urea/pot/seedling), FT3: 300 kg/ha (1.01037 g urea/pot/seedling) showed better performance in case of collar diameter (6.74 mm), number of leaves, shoot dry weight (19.74), total dry weight (28.16 g), total fresh weight (67.96 g), volume index (3904.82), sturdiness (127.69). Finally, it can be concluded that Q uercus gomeziana seedlings revealed better performances under the treatment FT1 in growth and biomass production. Findings of this study will be helpful to take decision on organic fertilizer dose application to seedlings of Q. gomeziana for large scale plantation and conservation of this species.
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Nandi, Rajasree,Mridha, M.A.U.,Bhuiyan, Md. Kalimuddin Institute of Forest Science 2014 Journal of Forest Science Vol.30 No.3
Status of Arbuscular Mycorrhizal (AM) colonization in seven tree species (Albizia saman, Acacia auriculiformis A. Cunn. ex Benth., Albizia lebbeck, Chickrassia tabularis A. Juss., Eucalyptus camaldulensis Dehnn., Gmelina arborea (Roxb) DC, Swietenia macrophylla King.) collected from the hilly areas of Chittagong University (CU) was investigated. Roots and rhizosphere soil samples were collected in different seasons (pre-monsoon, monsoon and post monsoon). Percentage of AM colonization in root and number of spores/100 gm dry soil were assessed. The result of the investigation reveals that the intensity and percentage of AM colonization varied in different forest tree species in different seasons. In this study, maximum AM colonization and spore population were found in pre-monsoon and minimum were in monsoon season. The intensity of colonization was maximum in C. tabularis (74.43%) in pre-monsoon, A. lebbeck (69.45%) in monsoon and S. macrophylla (67.8%) in post monsoon seasons and minimum in A. auriculiformis (53.75%) during pre-monsoon, A. saman (24.4%) in monsoon and A. saman (19.36%) in post monsoon. The number of spores found per 100 g dry soil ranged between 164-376 during pre-monsoon, 27-310 during monsoon and 194-299 in post monsoon season. Out of six recognized genera of AM fungi, Glomus, Sclerocystis, Entrophospora, Scutellospora, Acaulospora and other unidentified spores were observed.
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Rajasree Nandi,M.A.U. Mridha,Md. Kalimuddin Bhuiyan 강원대학교 산림과학연구소 2014 Journal of Forest Science Vol.30 No.3
Status of Arbuscular Mycorrhizal (AM) colonization in seven tree species (Albizia saman, Acacia auriculiformis A. Cunn. ex Benth., Albizia lebbeck, Chickrassia tabularis A. Juss., Eucalyptus camaldulensis Dehnn., Gmelina arborea (Roxb) DC, Swietenia macrophylla King.) collected from the hilly areas of Chittagong University (CU) was investigated. Roots and rhizosphere soil samples were collected in different seasons (pre -monsoon, monsoon and post monsoon). Percentage of AM colonization in root and number of spores/100 gm dry soil were assessed. The result of the investigation reveals that the intensity and percentage of AM colonization varied in different forest tree species in different seasons. In this study, maximum AM colonization and spore population were found in pre-monsoon and minimum were in monsoon season. The intensity of colonization was maximum in C. tabularis (74.43%) in pre-monsoon, A. lebbeck (69.45%) in monsoon and S. macrophylla (67.8%) in post monsoon seasons and minimum in A. auriculiformis (53.75%) during pre-monsoon, A. saman (24.4%) in monsoon and A. saman (19.36%) in post monsoon. The number of spores found per 100 g dry soil ranged between 164-376 during pre-monsoon, 27- 310 during monsoon and 194-299 in post monsoon season. Out of six recognized genera of AM fungi, Glomus, Sclerocystis, Entrophospora, Scutellospora, Acaulospora and other unidentified spores were observed.
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