Establishment of mixed plantations of Pinus sylvestris *** and Populus×xiaozhuanica may not be appropriate:evidence from litter decomposition

作     者：Huan-Huan Song Tao Yan De-Hui Zeng 

作者机构：CAS Key Laboratory of Forest Ecology and ManagementInstitute of Applied EcologyChinese Academy of SciencesShenyang 110016China Daqinggou Ecological StationInstitute of Applied EcologyChinese Academy of SciencesShenyang 110016China University of Chinese Academy of SciencesBeijing 100049China Sino-French Institute for Earth System ScienceCollege of Urban and Environmental SciencesPeking UniversityBeijing 100871China 

出 版 物：《Journal of Plant Ecology》 (植物生态学报（英文版）)

年 卷 期：2019年第12卷第5期

页      面：857-870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：This study was funded by the National Natural Science Foundation of China(31870603 and 31270668) 

主　　题：litter mass remaining nutrient immobilization litter mixture additive effect home-field advantage nutrient-poor area 

摘      要：Aims Mongolian pine(Pinus sylvestris ***)and Xiaozhuan poplar(Populus×xiaozhuanica)are two predominant afforestation tree species in the semi-arid sandy lands of northeast china,which are characterized by poor soil *** litter decomposition plays a critical role in regulating nutrient cycling in terrestrial *** of broadleaf litter to conifer litter is expected to improve litter decomposition and soil fertility,and thus ***,the effects on the decomposition of litter mixture of the above two tree species are not well ***,it is essential to assess the decomposition performance of litter mixture with the aim of improving forest nutrient management and the establishment of mixed *** forest manage-ment practice is critical for the sustainability of site productivity in plantation *** We conducted a field litterbag decomposition transplant experi-ment for single pine litter,single poplar litter and their mixture in a pine stand,a poplar stand and an adjacent grassland for 16 months in the Keerqin Sandy Lands,northeast *** Findings After 16 months of incubation,there remained significantly more litter mass of pine(73.8%)than of poplar(67.2%).the mass remaining was positively correlated with litter carbon(c):nitrogen(N),c:phosphorus(P)and lignin:N ratios,and negatively with litter N and P concentrations,which suggests that initial litter chemical properties were an important factor affecting litter ***,net N and P immobilizations were observed during *** indicates that litter decomposition in this area was N-limited as N was progressively immobilized,and then tended to induce P ***,we strongly recommend prohibiting litter harvesting by local residents to maintain soil fertility in this nutrient-poor *** results do not support the home-field advantage hypothesis,as illustrated by the fact that,in most cases,mass loss of