采用盆栽试验法,研究水分胁迫对蔓生紫薇(Lagerstroemia indica‘Summer and summer’)和亮叶忍冬(Lonicera nitida‘Maigrun’)两种木本地被植物生长及生理特性的影响。结果表明:水分胁迫下,两种植物的生长受到明显抑制,蔓生紫薇受抑...采用盆栽试验法,研究水分胁迫对蔓生紫薇(Lagerstroemia indica‘Summer and summer’)和亮叶忍冬(Lonicera nitida‘Maigrun’)两种木本地被植物生长及生理特性的影响。结果表明:水分胁迫下,两种植物的生长受到明显抑制,蔓生紫薇受抑制程度高于亮叶忍冬,其相对生长量远小于亮叶忍冬。水分胁迫使两种植物净光合速率、蒸腾速率、气孔导度下降,胞间CO2浓度则前期下降后期上升,且表现为蔓生紫薇各生理指标的变化幅度大于亮叶忍冬。综合评价两种植物的抗旱性为:亮叶忍冬>蔓生紫薇。展开更多
Based on the research on rock burst phenomenon induced by the breakage of thick and hard roof around roadways and working faces in coal mines, a criterion of rock burst induced by roof breakage （RBRB） was proposed a...Based on the research on rock burst phenomenon induced by the breakage of thick and hard roof around roadways and working faces in coal mines, a criterion of rock burst induced by roof breakage （RBRB） was proposed and the model was built. Through the model, a method calculating the varied stresses induced by roof breakage in support objects and coal body was proposed and a unified formula was derived for the calculation of stress increment on support objects and coal body under different breaking forms of roof. Whilst the formula for calculating dynamic load was derived by introducing dynamic index Kd. The formula was verified in Huating Mine by stress measurement. According to the formula for stress increment calculating, the sensitivities of dynamic load parameters were further studied. The results show that the thickness and breaking depth of roof, width of support objeet are the sensitive factors. Based on the discussion of the model, six associated effective methods for rock burst prevention are obtained.展开更多
文摘采用盆栽试验法,研究水分胁迫对蔓生紫薇(Lagerstroemia indica‘Summer and summer’)和亮叶忍冬(Lonicera nitida‘Maigrun’)两种木本地被植物生长及生理特性的影响。结果表明:水分胁迫下,两种植物的生长受到明显抑制,蔓生紫薇受抑制程度高于亮叶忍冬,其相对生长量远小于亮叶忍冬。水分胁迫使两种植物净光合速率、蒸腾速率、气孔导度下降,胞间CO2浓度则前期下降后期上升,且表现为蔓生紫薇各生理指标的变化幅度大于亮叶忍冬。综合评价两种植物的抗旱性为:亮叶忍冬>蔓生紫薇。
基金Project(2010CB226805) supported by the National Basic Research Program of ChinaProjects(30370412,30670558) supported by the National Natural Science Foundation of ChinaProject(SKLCRSM10X05) supported by the Self-research Program of the Key Laboratory of Coal Resources and Safe Mining,China
文摘Based on the research on rock burst phenomenon induced by the breakage of thick and hard roof around roadways and working faces in coal mines, a criterion of rock burst induced by roof breakage （RBRB） was proposed and the model was built. Through the model, a method calculating the varied stresses induced by roof breakage in support objects and coal body was proposed and a unified formula was derived for the calculation of stress increment on support objects and coal body under different breaking forms of roof. Whilst the formula for calculating dynamic load was derived by introducing dynamic index Kd. The formula was verified in Huating Mine by stress measurement. According to the formula for stress increment calculating, the sensitivities of dynamic load parameters were further studied. The results show that the thickness and breaking depth of roof, width of support objeet are the sensitive factors. Based on the discussion of the model, six associated effective methods for rock burst prevention are obtained.
