桂林七星公园阴香种群年龄结构研究

选择桂林七星公园中的阴香种群,采用"径级大小替代年龄大小"的方法,进行阴香种群年龄结构的研究,同时绘制了种群的年龄结构图及存活曲线。结果表明:4个样地中,样地2、样地4的阴香种群的年龄结构呈增长型,存活曲线为DeeveyⅠ型;样地1、样地3的阴香种群的年龄结构呈衰退型,存活曲线为Deevey II型。影响阴香种群年龄结构及其动态的主要因素为人为活动干扰。     

环境因子对巢湖沉积物中NH4+释放的影响

[目的]为揭示环境因子对巢湖沉积物-水界面营养盐交换的影响机制。[方法]在实验室控制条件下,研究各环境因子(上覆水浓度、温度、pH值、DO条件)对巢湖沉积物湿样中NH4+释放的影响。[结果]随着温度的上升和上覆水NH4+浓度的降低,沉积物中NH4+释放量显著增加;pH值对NH4+释放的影响比较复杂;沉积物中NH4+最大释放量在厌氧条件下是好氧条件下的6倍左右。[结论]该研究为"引江济巢"工程中巢湖的环境管理提供了一定的理论依据。     

超声波辅助提取蚕沙中类黄酮的研究

采用超声波辅助法提取蚕沙中的类黄酮,通过单因素试验考察乙醇浓度、提取温度、处理时间对类黄酮提取率的影响。结果表明,超声波辅助提取蚕沙中类黄酮的最佳工艺条件为：乙醇浓度30％,超声波提取时间35min,提取温度70℃,此条件下蚕沙中类黄酮的提取率为2．358％。     

环境因子对巢湖沉积物中NH+4释放的影响

[Objective] The aim of the research was to reveal the influence mechanism of sediment-water exchange of nutrients in Chaohu Lake. [Method] The effects of environmental factors (overlying water, temperature, pH and dissolved oxygen concentration) on NH 4 release in sediment from Chaohu Lake were studied under controlled laboratory conditions. [Results] With the rising of temperature and the decrease of NH 4 concentration in overlying water, NH 4 released from sediment increased significantly. pH had a great effect on NH 4 release with a complicated mechanism. The largest release amount of NH 4 under anaerobic condition was about 6 times as much as that under aerobic condition. [Conclusion] This research would provide theoretical support for environmental management of Chaohu Lake in the project of leading water from the Yangtze River to Chaohu Lake.     

环境因子对巢湖沉积物中NH4+释放的影响（英文）

[Objective] The aim of the research was to reveal the influence mechanism of sediment-water exchange of nutrients in Chaohu Lake. [Method] The effects of environmental factors （overlying water, temperature, pH and dissolved oxygen concentration） on NH₄⁺ release in sediment from Chaohu Lake were studied under controlled laboratory conditions. [Results] With the rising of temperature and the decrease of NH₄⁺ concentration in overlying water, NH₄⁺ released from sediment increased significantly. pH had a great effect on NH₄⁺ release with a complicated mechanism. The largest release amount of NH₄⁺ under anaerobic condition was about 6 times as much as that under aerobic condition. [Conclusion] This research would provide theoretical support for environmental management of Chaohu Lake in the project of leading water from the Yangtze River to Chaohu Lake.