摘要
利用ICP-MS法测定了不同树龄油茶花粉中稀土元素的含量,分析了其与单株产量间的相关性,及其在沸水中的释出规律,旨在为油茶栽培以及油茶花粉的保健食用提供参考。结果发现,油茶花粉中稀土元素含量极低,部分树龄油茶花粉中甚至检测不到Ho、Tm、Lu、Sc、Pm的存在,含量最高的Ce,也仅为0.090 5 mg/kg(32 a树龄)。花粉中各稀土元素含量以及单株产量随树龄增加均呈先增加后降低的趋势;稀土元素总量与产量呈显著正相关关系(R2=0.91);但各稀土元素与产量则无显著相关性。32 a树龄油茶花粉在沸水浸泡15 min后,除Sc、Pm、Tb、Ho、Tm、Yb、Lu7种元素外,其他10种稀土元素均有不同程度释出,释出量最高的为Ce,释出率最高的为Nd;所有元素的总释出量达到0.043 3 mg/kg,对应的总释出率为17.4%。提示,适量稀土元素对提高油茶产量有积极意义,在合适龄段施加一定稀土肥有利于油茶增产;食用油茶花粉保健时,可在服用前通过沸水冲泡处理减少稀土元素摄入。
The contents of rare earth elements( REE) in Camellia oleifera pollen with different tree age were determined by ICP-MS,the correlation between REE content and the yield per plant,and the precipitation rate of REE in boiling water were analyzed,so as to provide some references for the Camellia oleifera cultivation and pollen safe taken for health care. The results showed that the REE contents in the Camellia oleifera pollen were extremely low,some elements such as Ho,Tm,Lu,Sc,Pm even could not be detected at several tree ages,the Ce content is the highest with 0. 090 5 mg / kg at 32 a. The each REE content and the yield per plant both showed a trend of increase first then decrease with the increase of tree age. A significant positive correlation was observed between total content of REE and the yield per plant(R2= 0. 91),while there were no significant positive correlation between each REE element content and yield per plant. REE released from pollen(32 a) in varying degrees after 15 min boiling water treatment except Sc,Pm,Tb,Ho,Tm,Yb,Lu. Ce and Nd showed the maximum release content and release rate,respectively. The total precipitation amount of all elements reached 0. 043 3 mg / kg corresponding to a totalprecipitation rate of 17. 4%. The above results indicated that,an appropriate REE content had a significant positive effect on Camellia oleifera yield improving,so a reasonable REE fertilizer applying could increase high yield of Camellia oleifera at suitable tree age,and a boiling water treatment was done to reduce the intake of REE before taking Camellia oleifera pollen for health care.
出处
《河南农业科学》
CSCD
北大核心
2016年第8期39-42,58,共5页
Journal of Henan Agricultural Sciences
基金
湖南省科技厅科研项目(2014NK3133)
湖南省创新团队项目(2012-318)
湘南优势植物资源综合利用湖南省重点实验室项目(XNZW15C10
XNZW15C18)
2014年湖南科技学院科研课题及校大学生研究性学习课题
关键词
油茶
稀土元素
产量
花粉
释出率
Camellia oleifera
rare earth elements
yield
pollen
precipitation rate
