期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
中国亚热带5种林型的碳库组分偶联关系及固碳潜力 被引量:3
1
作者 彭舜磊 于贵瑞 +1 位作者 何念鹏 王秋凤 《第四纪研究》 CAS CSCD 北大核心 2014年第4期777-787,共11页
中国亚热带森林对亚热带地区乃至中国的碳收支和碳平衡具有十分的重要作用。根据中国亚热带地区5种主要林型(杉木林、马尾松林、常绿阔叶林、阔叶速生人工林和针阔混交林)生物量的文献资料,采用关联矩阵法分析了亚热带5种林型树干、树... 中国亚热带森林对亚热带地区乃至中国的碳收支和碳平衡具有十分的重要作用。根据中国亚热带地区5种主要林型(杉木林、马尾松林、常绿阔叶林、阔叶速生人工林和针阔混交林)生物量的文献资料,采用关联矩阵法分析了亚热带5种林型树干、树枝、树叶、乔木层地上部分、乔木层地下部分、乔木层总碳库、林下植被碳库(包括灌木层和草本层)、死生物量碳库(包括枯立木、枯倒木、枯枝和凋落物)8个碳库间的偶联关系,利用回归方程研究乔木层、林下植被层、死生物量碳密度与立木蓄积量的关系,通过Logistic曲线探讨5种林型乔木层的最大碳密度。结果表明:1)5种林型生态系统碳库组分的碳密度和分配比例存在明显差异,但均呈现乔木层>死生物量>灌木层>草本层的规律;2)5种林型树干、乔木层地上部分、乔木层地下部分、乔木层总碳库的碳密度之间关联性极为显著(p<0.001),它们与死生物量碳密度的关联性均达到显著水平(p<0.05);针阔混交林的林下植被碳密度与其他碳库组分碳密度相关性不显著(p>0.05),而其他4种林型的林下植被碳密度均与树干、乔木层地上部分、乔木层地下部分、乔木层总碳库、死生物量的碳密度显著相关(p<0.05);3)针阔混交林的林下植被碳密度与立木蓄积量相关性不显著,其他4种林型的乔木层总碳密度、林下植被碳密度、死生物量碳密度与立木蓄积量的回归曲线均达到显著水平(p<0.05);4)5种林型乔木层的碳密度与林龄的关系符合Logistic曲线(p<0.0001),碳密度最大值分别为194.43Mg/hm^2,110.62Mg/hm^2,260.42Mg/hm^2,175.52Mg/hm^2和157.20Mg/hm^2,它们可视为亚热带5种林型乔木层固碳潜力的参考水平。 展开更多
关键词 乔木层 林下植被 死生物量 关联分析 Logistic曲线
原文传递
Effects of therapies for regulating and reinforcing lung and kidney on osteoporosis in rats with chronic obstructive pulmonary disease 被引量:13
2
作者 Tian Yange Li Ya +5 位作者 Li Jiansheng Li Suyun Jiang Suli Wang Ying Lu Xiaofan Li Weiwei 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2015年第2期175-183,共9页
OBJECTIVE:To evaluate the efficacy and long-term effects of the three therapies for regulating and reinforcing lung and kidney(reinforcing lung and invigorating spleen,reinforcing lung and replenishing kidney,and supp... OBJECTIVE:To evaluate the efficacy and long-term effects of the three therapies for regulating and reinforcing lung and kidney(reinforcing lung and invigorating spleen,reinforcing lung and replenishing kidney,and supplementing Qi and nourishing kidney) in Traditional Chinese Medicine(TCM) on osteoporosis in rats with chronic obstructive pulmonary disease.METHODS:Totally 120 rats were randomly divided into control,model,Bufeijianpi,Bufeiyishen,Yiqizishen,aminophyline groups.Repeated smoke inhalations and bacterial infections were used to duplicate the stable Chronic obstructive pulmonary disease rat model.Normal saline was given to the air control and model groups,while Bufeijianpi granule,Bufeiyishen granule,and Yiqizishen granule,and aminophylline were administrated to rats in the Bufeijianpi,Bufeiyishen,Yiqizishen,and aminophylline groups respectively from weeks 9 through 20.Another 12 weeks without medicines to observe the long-term effect.Rats were sacrificed at week 20 and week 32.Bone mass density(BMD),bone mineral content(BMC),morphology of the femoral head,lung function,and levels of serum interleukin(IL)-1β,IL-6,and tumor necrosis factor-a were detected.RESULTS:At weeks 20 and 32,tidal volume,peak expiratory flow and expiratory flow at 50% tidal volume in the three TCM-treated groups were higher than those in the model group(P < 0.05).Femur weight,BMD,and BMC were significantly higher in the three TCM-treated groups and the aminophylline-treated group compared with the model group(P < 0.01),except for BMC in the Yiqizishen-treated group at week 20.CONCLUSION:Bufeijianpi,Bufeiyishen,and Yiqizishen granules show good effects in the prevention and treatment of osteoporosis,which can alleviate airflow limitations and inflammation,improve BMD and BMC of the femur,and have favorable long-term effects. 展开更多
关键词 Pulmonary disease chronic obstructive Osteoporosis Medicine Chinese traditional Bufeijianpi granule Bufeiyishen granule Yiqizishen granule
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部