Leaf nutrient dynamics and nutrient resorption:a comparison between larch plantations and adjacent secondary forests in Northeast China

作     者：Tao Yan Xiaotao Lü Kai Yang Jiaojun Zhu 

作者机构：State Key Laboratory of Forest and Soil EcologyInstitute of Applied EcologyChinese Academy of SciencesNo.72 Wenhua RoadShenhe DistrictShenyang 110164China Qingyuan Forest CERNChinese Academy of SciencesNo.72 Wenhua RoadShenhe DistrictShenyang 110016China University of Chinese Academy of SciencesNo.19A Yuquan RoadShijingshan DistrictBeijing 100049China 

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

年 卷 期：2016年第9卷第2期

页      面：165-173页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0907[农学-林学] 08[工学] 0829[工学-林业工程] 09[农学] 0901[农学-作物学] 0902[农学-园艺学] 0713[理学-生态学] 

基　　金：National Basic Research Program of China(973 Program)(2012CB416906) State Key Laboratory of Forest and Soil Ecology(LFSE2013-11) 

主　　题：seasonal variation nutrient resorption efficiency soil nutrient availability natural secondary forest Larix spp. 

摘      要：Aims Conversion of secondary forests to pure larch plantations is a common management practice driven by the increasing demand for timber production in Northeast China,resulting in a reduction in soil nutrient availability after a certain number of years following *** resorption prior to leaf senescence was related to soil fertility,an important nutrient conservation strategy for plants,being especially significant in nutrient-poor ***,the seasonal dynamics of leaf nutrients and nutrient resorption in response to secondary forest conversion to larch plantations is not well *** A comparative experiment between larch plantations(Larix spp.)and adjacent secondary forests(dominant tree species including Quercus mongolica,Acer mono,Juglans mandshurica and Fraxinus rhynchophylla)was *** examined the variations in leaf nutrient(macronutrients:N,P,K,Ca and Mg;micronutrients:Cu and Zn)concentrations of these tree species during the growing season from May to October in *** resorption efficiency and proficiency were compared between Larix *** the broadleaved species in the secondary *** Findings Results show that the seasonal variation of nutrient concentrations in leaves generally exhibited two trends,one was a downward trend for N,P,K,Cu and Zn,and another was an upward trend for Ca and *** variations in foliar nutrient concentrations were mainly controlled by the developmental stage of leaves rather than by tree *** of the observed seven elements varied among the five tree species during leaf *** resorption efficiency varied 6–75%of N,P,K,Mg,Cu and Zn,while Ca was not retranslocated in the senescing leaves of all species,and Mg was not retranslocated in Larix ***,Larix *** to be more efficient and proficient(higher than 6–30%and 2–271%of nutrient resorption efficiency and resorption proficiency,respectively)in resorbing nutrients than the broa