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您的检索式：作者名="Ashalata Devi"
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| 1 | Plant diversity, population structure, and regeneration status in disturbed tropical forests in Assam, northeast India显示文摘We investigated the plant population structure and the phytosociological and regeneration status in two disturbed tropical forests in Assam Province, the Hojai Reserve Forest and Kumorakata Reserve Forest.A total of 166 species(80 trees, 20 shrubs and 66 herbs) of 136genera and 63 families were recorded in both study sites.The disturbance index at the two sites, Kumorakata Reserve Forest and Hojai Reserve Forest, were recorded at 11.4% and 3.70% respectively.Reverse J-shaped population curve and exploitation of tree species in higher girth classes were recorded at both study sites.In the girth classes(10 30 cm,30 60 cm, 60 90 cm and 90 120 cm in size) the percentage of cut stump density was higher than the percentage of individual living trees.The18%(Kumorakata Reserve Forest) and 7%(Hojai Reserve Forest) species were recorded as 'not regenerating.' Illegal felling and over-exploitation of forest resources may lead to species-specific changes in the population structure and can alter the future structure and composition of the forests. | Gitamani Dutta Ashalata Devi | 2013 | Journal of Forestry Research2013，24，4： | 3 |
| 2 | An application of blended amendments in monsoon rice field显示文摘Introduction:Rice is the main food crop of the world,and the cultivation of rice crop during the monsoon season is hard due to the rain-induced waterlogging.Apart from this,farmers in north-eastern regions of India often implement improper crop management leading to poor yields.Thus,the development of suitable management practices under improved varieties of rice become essential for increasing rice productivity,improving soil quality status and reducing methane emission.Methods:The aim of the study was to investigate the variation in soil properties,crop growth and methane emission under the application of an inorganic fertiliser as well as its mixtures with both inorganic and plant materials.In such an attempt,a field-based experiment was conducted with the rice variety Chandrama during 2015 in slightly acidic soil having sandy loam texture.Five amendments,i.e.NPK and NPK,blended separately with magnesium sulphate,fresh neem(Azadirechta indica)leaves,used tea(Camellia sinensis var.assamica)leaves,and fresh karanj(Pongamia glabra)leaves were used for the study with four replications each.Results:Application of NPK separately with the leaves of neem,tea and karanj separately at the onset of monsoon season markedly affected the soil porosity and the water-holding capacity of the soil.However,in comparison with sole NPK fertilisation,a significance increase in soil organic matter accumulation(2.48±0.10%)was seen only for karanjblended NPK while magnesium sulphate-blended NPK showed the lowest methane emission(0.30±0.01 mg/m2/h).The rice plants grown on karanj-blended NPK soil showed the highest yield(0.560±0.01 kg/m2)among the five amendments.Conclusions:It was found that only the karanj leaves blended NPK could significantly improve the soil organic matter and increase rice yield without intensifying methane emission,while magnesium sulphate blended with NPK could significantly reduce methane emission in the flooded rice paddy soil at 0.5 t/ha application level but exhibit lower rice yield. | Madhumita Ghosh Ashalata Devi | 2017 | Ecological Processes2017，6，1： | 0 |
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