文献类型：期刊文献

中文题名：不同管理措施下檀香-降香黄檀混交林凋落物特征

英文题名：Litterfall and its nutrient content in Santalum album-Dalbergia odoriferamixed plantation under different management regimes

作者：薛世玉[1] 李小飞[1] 郭俊誉[1] 徐大平[1] 崔之益[1] 杨曾奖[1]

第一作者：薛世玉

机构：[1]中国林业科学研究院热带林业研究所,广州510520

年份：2021

卷号：27

期号：5

起止页码：1186-1193

中文期刊名：应用与环境生物学报

外文期刊名：Chinese Journal of Applied and Environmental Biology

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：国家重点研发计划项目(2016YFD0600205)资助。

语种：中文

中文关键词：檀香-降香黄檀混交林;铲草;施肥;凋落物数量;凋落物组成;凋落物养分归还

外文关键词：Santalum album-Dalbergiaodorifera mixed plantation;weeding;fertilization;litterfall amount;litterfall composition;litterfall nutrient return

分类号：S714

摘要：近年来我国南方大力发展珍贵树种人工林,檀香(Santalum album Linn.)-降香黄檀(Dalbergia odorifera T.Chen.)混交林是其中的典型代表.为评估不同管理措施下该林分养分循环特征,在广东省佛山市高明区选取8年生檀香-降香黄檀混交林,开展铲草、施肥、铲草+施肥抚育管理对其凋落物及养分归还的影响研究.结果表明:不同管理措施对年凋落物量影响差异显著(P<0.05),施肥处理较对照年凋落物量增加26.88%,铲草+施肥和铲草处理较对照则分别减少6.57%和17.99%.凋落物各组分中,落叶所占比最大(62.23%-73.55%),其次为杂物(14.75%-22.05%),花果、落枝所占比重较小.各处理年凋落物量的月动态变化模式均为双峰型,峰值集中在夏秋两季出现,春冬季波动较小.年养分归还量表现为N>K>P;其中N年归还量:施肥和铲草+施肥处理较对照分别增加56.26%和14.25%,铲草较对照减少9.90%;P年归还量:施肥处理较对照增加28.34%,铲草+施肥、铲草处理较对照分别减少19.09%和28.25%;K年归还量:施肥、铲草+施肥处理较对照分别增加62.75%、3.37%,铲草处理较对照减少16.31%.综合分析不同处理对凋落物量、组成、养分归还的影响,在檀香-降香黄檀混交林中,施肥可显著增加凋落物养分归还量,铲草则显著减少凋落物养分归还量.
In recent years,large-scale plantations of high-value tree species have been widely cultivated,and a typical mixed plantation of Santalum album-Dalbergia odorifera has been successfully established in southern China.In order to assess the effects of different management measures on the litterfall biomass and nutrient cycle of the mixed plantation,we conducted a field tending experiment with four treatments(control,fertilization,weeding,and fertilization+weeding)in an 8-year-old mixed plantation of Santalum album-Dalbergia odorifera in Gaoming county,Guangdong province,China.Dynamic changes in the biomass and nutrient contents of litterfall were investigated over the course of the year.Significant differences(P<0.05)in annual litterfall biomass were observed among the four treatments.Compared with the control group,the amount of annual litterfall biomass increased by 26.88%in the fertilization treatment and decreased by 6.57%and 17.99%in the weeding+fertilization and weeding treatments,respectively.Among all components of litter,the proportion of leaves was the largest(62.23%-73.55%),followed by sundries(14.75%-22.05%),with the proportion of flowers,fruits,and branches being the smallest.The monthly variation in litterfall biomass showed bimodal patterns,with peaks in summer and autumn.The annual nutrient return amounts of litterfall appeared in the order of N>K>P.The annual return amount of N increased by 56.26%and 14.25%under fertilization and weeding+fertilization,respectively,and decreased by 9.90%under weeding compared with the control.Compared with the control,the annual return amount of P increased by 28.34%in the fertilization treatment,whereas it decreased by 19.09%and 28.25%in the weeding+fertilization and weeding treatments,respectively.The annual return amount of K increased by 62.75%and 3.37%in the fertilization and weeding+fertilization treatments,respectively,whereas it decreased by 16.31%in the weeding treatment.A comprehensive analysis of the effects of different treatments on the biomass,composition,and nutrient return amount of litterfall showed that in the mixed plantation of Santalum album-Dalbergia odorifera,fertilization increased,whereas weeding reduced the amount of litterfall nutrient return.