文献类型：期刊文献

英文题名：Nitrogen and Phosphorus Distribution and Relationship in Soils and Plants under Different Aged Chinese Fir Plantation

作者：Yang, Zhen'an[1] Luo, Zhibin[2]

第一作者：Yang, Zhen'an

通信作者：Yang, ZA[1];Luo, ZB[2]

机构：[1]China West Normal Univ, Minist Educ, Key Lab Southwest China Wildlife Resources Conser, Nanchong 637009, Peoples R China;[2]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Res Inst Forestry, Beijing 100091, Peoples R China

年份：2021

卷号：12

期号：9

外文期刊名：FORESTS

收录：;EI(收录号：20213910942431);Scopus(收录号：2-s2.0-85115644897);WOS:【SCI-EXPANDED(收录号:WOS:000699567400001)】；

基金：This work was supported by the State Key Basic Research Development Program(2012CB416902), the Specialized Research Fund for the Doctoral Program of Higher Education of China (20130204110012) and the Scientific Research Foundation of China West Normal University (18Q045).

语种：英文

外文关键词：nitrogen; phosphorus; Cunninghamia lanceolate; allometric equation; linkage

摘要：As essential nutrients for plant growth and development, the balance of nitrogen (N) and phosphorus (P) between soils and plants is a key component to ecosystem stability. In this study, we examined the distribution of nutrients in the soils and different organs of Chinese fir (Cunninghamia lanceolata) in Hunan Province, southern China. Additionally, we investigated the nutrient concentrations in soil layers (0-80 cm depth) and in plant organs, and the total biomass of 10-, 20-, and 30-year-old plantations. The results suggested that the nutrients in the soil were aggregated in the surface layer. The highest and lowest values of N concentrations in 0-80 cm soil layers and P concentrations in 0-40 cm soil layers were both in 30-year-old plantations and 20-year-old plantations, respectively. Nitrogen in the organs of Chinese fir in all plantations and P concentrations in the organs of 20- and 30-year-old trees decreased in the following order: leaves, fine roots, coarse roots, and stems. Total biomass (N and P pools of four organs) increased consistently with stand age increase, and N and P pools were the highest in leaves and stems, respectively. There were significant, positive correlations between N and P in the soil (0-80 cm), and organs, respectively, and also between N concentrations of fine roots and that of 0-10 and 10-20 cm soil, respectively. In Chinese fir plantations, concentrations of nutrients in specific tree organs and the soil were correlated positively, which can only partially explain the balance of nutrients within the plant-soil ecosystem. This study suggested that incorrect harvesting patterns may effectively deprive the forest ecosystem of valuable nutrients that would ordinarily have been returned to the soil.