Does nitrogen fertilization impact nonstructural carbohydrate storage in evergreen Podocarpus macrophyllus saplings?

作     者：Renshan Li Jianming Han Liqiong Zhu Lijun Zhao Xiangling Huang Mingyue Zhang Qingpeng Yang Weidong Zhang Renshan Li;Jianming Han;Liqiong Zhu;Lijun Zhao;Xiangling Huang;Mingyue Zhang;Qingpeng Yang;Weidong Zhang

作者机构：Life Science DepartmentLuoyang Normal UniversityLuoyang 471934People’s Republic of China College of ForestryGuangxi UniversityNanning 530004People’s Republic of China Key Laboratory of Forest Ecology and ManagementInstitute of Applied EcologyChinese Academy of SciencesShenyang 110016People’s Republic of China Huitong National Research Station of Forest EcosystemHuitong 418307People’s Republic of China 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2021年第32卷第4期

页      面：1653-1661页

核心收录：

学科分类：0907[农学-林学] 08[工学] 0829[工学-林业工程] 09[农学] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.31560061) 

主　　题：Photosynthate Allocation Source-sink balance Plant nutrient supply Podocarpus macrophyllus saplings 

摘      要：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 ***,little is known regarding the timeseries responses of NSC storage in evergreen species to different nitrogen(N)fertilization *** 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 *** results showed that the net photosynthetic rate(P_(n))under MN was significantly higher than that under LN,but was comparable to that under ***,saplings subject to MN had a significant higher leaf biomass than that to LN and *** results indicated that the C supply via photosynthesis under MN was greater than that under LN and *** 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 ***,saplings under HN stored higher properties of NSCs than those under MN considering that no difference in NSCs pools was found between the two *** leaf N concentrations were found in the increasing sequence of LNMNHN,whilst the leaf chlorophyll concentration under HN was obviously lower than that under *** growth rate under MN was higher than that under LN and *** concluded that the NSCs allocation between con-sumption and reserve in *** saplings depended on soil N availability,and an excessive N addition to soil favors the storage rather than the consumption of NSCs by plants.