文献类型：期刊文献

英文题名：The effects of afforestation tree species mixing on soil organic carbon stock, nutrients accumulation, and understory vegetation diversity on reclaimed coastal lands in Eastern China

作者：Xie, Hongtao[1] Tang, Yu[1] Yu, Mukui[2] Wang, G. Geoff[3]

第一作者：Xie, Hongtao

通信作者：Xie, HT[1];Wang, GG[2]

机构：[1]Zhejiang A&F Univ, Jiyang Coll, Zhuji 311800, Peoples R China;[2]Chinese Acad Forestry, Inst Subtrop Forestry, East China Coastal Forest Ecosyst Long Term Res S, Hangzhou 311400, Zhejiang, Peoples R China;[3]Clemson Univ, Dept Forestry & Environm Conservat, Clemson, SC 29634 USA

年份：2021

卷号：26

外文期刊名：GLOBAL ECOLOGY AND CONSERVATION

收录：;Scopus(收录号：2-s2.0-85100763886);WOS:【SCI-EXPANDED(收录号:WOS:000641413600004)】；

基金：This research was funded by the cooperative program in forest science between Zhejiang Province and Chinese Academy of Forestry (grant number 14204005, 16204002) and Jiyang College of Zhejiang A&F University under Grant No. RQ1911F09.

语种：英文

外文关键词：Tree species identity; Mixed forest; Soil organic carbon stock; Nutrient accumulation; Understory regeneration; Reclaimed lands

摘要：Establishing mixed-species plantations on the reclaimed coastal lands has become a new paradigm in forest management in China, because it increases the provision of ecosystem services. However, the mixing effects of trees with different identities remain largely understudied. In subtropical China, plantations have been historically dominated by monocultures, the conversion of which to mixed plantations are now required considering the need of sustainable forestry development. In this study, we evaluated the soil carbon sequestration, nutrient accumulation, and understory regeneration of three coastal plan-tations with different compositions established 12 years ago, on a reclaimed area in Eastern China. Plots on two scales (30 m x 20 m for trees and 1 m x 1 m for understory vegetation) were set up to conduct vegetation inventory and soil sampling to compare growth parameters, soil physical and chemical properties, and understory composition. We found that coniferous-mixed forest (CMF) had significantly higher soil available water capacity; both CMF and broadleaved-coniferous mixed forest (B-CMF) had significantly higher soil capillary porosity and soil moisture content at saturation; broadleaved mixed forest (BMF) had a greater soil permeability coefficient. Among soil chemical properties, we observed that CMF had higher soil organic carbon stock and cation exchange capacity in both 0-20 cm and 20-40 cm soil layers. CMF and B-CMF had higher hydrolysable ni-trogen and total potassium in both soil layers; BMF had higher available phosphorus contents. Moreover, B-CMF supported better canopy tree growth and higher understory plant species diversity. Therefore, our results showed that the introduction of broad-leaved trees into the coniferous-dominated plantations established on the reclaimed coastal lands produced significant effects on soil properties and understory species diversity. Thus, our study may facilitate the development of new afforestation regimes to mitigate the po-tential impact of increasing environmental changes by improving our understanding of species composition effects on coastal forest ecosystem functioning. (c) 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).