Eco-physiological responses of seedlings of eight species, Pinus koraiensis, Picea koraiensis, Larix olgensis, Populus ussuriensis, Betula platyphylla, Tilia amurensis, Traxinus mandshurica and Acer mono from broadlea...Eco-physiological responses of seedlings of eight species, Pinus koraiensis, Picea koraiensis, Larix olgensis, Populus ussuriensis, Betula platyphylla, Tilia amurensis, Traxinus mandshurica and Acer mono from broadleaved/Korean pine forest, to elevated CO2 were studied by using open-top chambers under natural sunlight in Changbai Mountain, China in two growing seasons (1998-1999). Two concentrations of CO2 were designed: elevated CO2 (700 祄olmol-1) and ambient CO2 (400 祄olmol-1). The study results showed that the height growth of the tree seedlings grown at elevated CO2 increased by about 10%-40% compared to those grown at ambient CO2. And the water using efficiency of seedlings also followed the same tendency. However, the responses of seedlings in transpiration and chlorophyll content to elevated CO2 varied with tree species. The broad-leaf tree species were more sensitive to the elevated CO2 than conifer tree species. All seedlings showed a photosynthetic acclimation to long-term elevated CO2.展开更多
A series of pot experiments and field trials were carried out to evaluate the effects of arbuscular mycor- rhizal fungi （AMF） on activities of soil enzymes and carbon sequestration capacity in reclaimed mine soil. A...A series of pot experiments and field trials were carried out to evaluate the effects of arbuscular mycor- rhizal fungi （AMF） on activities of soil enzymes and carbon sequestration capacity in reclaimed mine soil. A complex substrate of coal gangue, fly ash and sludge was used as reclaimed mine soil, and ryegrass was planted with AMF inoculation to construct a plant-complex substrate-microbe ecological restoration sys- tem. The changes to the soil organic carbon （SOC）, activities of soil enzymes and glomalin-related soil protein （GRSP） were measured and the effects of AMF on activities of soil enzymes and carbon sequestra- tion capacity （n reclaimed mine soil were analyzed. The results show that the contents of GRSP （total glo- malin （TG） and easily extractable glomalin （EEG））, SOC and activities of enzymes increased, and the increments were higher in the AMF inoculation treated plant-complex substrate-microbe ecological res- toration systems than those with no AMF inoculated treatments after 12 months of ryegrass growth. TG, EEG and soil enzyme activity have a significant positive correlation, and the correlative coefficient was 0.427-0.573; SOC and TG, EEG have a significant positive correlation （p 〈 0.01 ）, indicating that AMF plays an important role in carbon sequestration of reclaimed mine soils.展开更多
基金The project was supported by National Key Basic Development of China (G1999043400) and the grant KZCX-406-4 KZCX1SW01 of the Chinese Academy of Sciences
文摘Eco-physiological responses of seedlings of eight species, Pinus koraiensis, Picea koraiensis, Larix olgensis, Populus ussuriensis, Betula platyphylla, Tilia amurensis, Traxinus mandshurica and Acer mono from broadleaved/Korean pine forest, to elevated CO2 were studied by using open-top chambers under natural sunlight in Changbai Mountain, China in two growing seasons (1998-1999). Two concentrations of CO2 were designed: elevated CO2 (700 祄olmol-1) and ambient CO2 (400 祄olmol-1). The study results showed that the height growth of the tree seedlings grown at elevated CO2 increased by about 10%-40% compared to those grown at ambient CO2. And the water using efficiency of seedlings also followed the same tendency. However, the responses of seedlings in transpiration and chlorophyll content to elevated CO2 varied with tree species. The broad-leaf tree species were more sensitive to the elevated CO2 than conifer tree species. All seedlings showed a photosynthetic acclimation to long-term elevated CO2.
基金supported by the Environmental Science andTechnology Fund of Environmental Protection Department of Jiangsu Province,China (No. 2007024)
文摘A series of pot experiments and field trials were carried out to evaluate the effects of arbuscular mycor- rhizal fungi （AMF） on activities of soil enzymes and carbon sequestration capacity in reclaimed mine soil. A complex substrate of coal gangue, fly ash and sludge was used as reclaimed mine soil, and ryegrass was planted with AMF inoculation to construct a plant-complex substrate-microbe ecological restoration sys- tem. The changes to the soil organic carbon （SOC）, activities of soil enzymes and glomalin-related soil protein （GRSP） were measured and the effects of AMF on activities of soil enzymes and carbon sequestra- tion capacity （n reclaimed mine soil were analyzed. The results show that the contents of GRSP （total glo- malin （TG） and easily extractable glomalin （EEG））, SOC and activities of enzymes increased, and the increments were higher in the AMF inoculation treated plant-complex substrate-microbe ecological res- toration systems than those with no AMF inoculated treatments after 12 months of ryegrass growth. TG, EEG and soil enzyme activity have a significant positive correlation, and the correlative coefficient was 0.427-0.573; SOC and TG, EEG have a significant positive correlation （p 〈 0.01 ）, indicating that AMF plays an important role in carbon sequestration of reclaimed mine soils.
