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Does nitrogen fertilization impact nonstructural carbohydrate storage in evergreen Podocarpus macrophyllus saplings? 被引量:1
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作者 Renshan Li Jianming Han +5 位作者 Liqiong Zhu Lijun Zhao Xiangling Huang Mingyue Zhang Qingpeng Yang Weidong Zhang 《Journal of Forestry Research》 SCIE CAS CSCD 2021年第4期1653-1661,共9页
Nonstructural carbon(NSC),which represents the relationship between the carbon source and carbon sink,is an important factor that reflects the functions and performance of a tree.However,little is known regarding the ... Nonstructural carbon(NSC),which represents the relationship between the carbon source and carbon sink,is an important factor that reflects the functions and performance of a tree.However,little is known regarding the timeseries responses of NSC storage in evergreen species to different nitrogen(N)fertilization regimes.This study,which was based on a pot experiment,examined the response of the NSC(soluble sugars and starch storage to different N addition intensities[light N addition(LN):6.5 g N m^(-2)a^(-1);moderate N addition(MN):13.0 g N m^(-2)a^(-1);and heavy N addition(HN):26.0 g N m^(-2)a^(-1))]in saplings of the evergreen species Podocarpus macrophyllus.Our results showed that the net photosynthetic rate(P_(n))under MN was significantly higher than that under LN,but was comparable to that under HN.Moreover,saplings subject to MN had a significant higher leaf biomass than that to LN and HN.These results indicated that the C supply via photosynthesis under MN was greater than that under LN and HN.The NSCs reserve under MN was considerable with that under LN,which suggested that saplings in MN group consumed higher and stored lower properties of NSCs than those in LN group.However,saplings under HN stored higher properties of NSCs than those under MN considering that no difference in NSCs pools was found between the two treatments.The leaf N concentrations were found in the increasing sequence of LN<MN<HN,whilst the leaf chlorophyll concentration under HN was obviously lower than that under MN.The growth rate under MN was higher than that under LN and HN.We concluded that the NSCs allocation between con-sumption and reserve in P.macrophyllus saplings depended on soil N availability,and an excessive N addition to soil favors the storage rather than the consumption of NSCs by plants. 展开更多
关键词 PHOTOSYNTHATE ALLOCATION Source-sink balance Plant nutrient supply podocarpus macrophyllus saplings
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不同产地罗汉松叶总黄酮提取工艺的优化与含量测定 被引量:2
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作者 刘睿 马家宝 +4 位作者 陆峥琳 魏江存 陈朝 韦丽富 崔健 《湖北农业科学》 2020年第20期141-144,149,共5页
采用回流提取法提取罗汉松[Podocarpus macrophyllus(Thunb.)D.Don]叶总黄酮,通过单因素试验,考察提取方法、提取溶剂体积分数、提取体积、提取时间对药材总黄酮含量的影响,采用正交试验优化提取工艺条件,筛选出罗汉松叶总黄酮的最佳提... 采用回流提取法提取罗汉松[Podocarpus macrophyllus(Thunb.)D.Don]叶总黄酮,通过单因素试验,考察提取方法、提取溶剂体积分数、提取体积、提取时间对药材总黄酮含量的影响,采用正交试验优化提取工艺条件,筛选出罗汉松叶总黄酮的最佳提取工艺。结果表明,罗汉松叶总黄酮的最佳提取工艺为75%乙醇、料液比1∶30(g∶mL)、回流提取时间0.5 h。该方法重复性较好、稳定、可行。 展开更多
关键词 罗汉松[podocarpus macrophyllus(Thunb.)D.Don] 总黄酮 提取工艺 紫外可见-分光光度法
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