模拟增温对大青山油松林凋落物分解动态的影响  

Simulation of the effects of warming on the dynamics of litter decomposition in a Daqingshan oil pine plantations

作　　者：李昕桥 吴昊 梁蕾 马秀枝[1] 李长生[3] 韩晓荣 LI Xin-qiao;WU Hao;LIANG Lei;MA Xiu-zhi;LI Chang-sheng;HAN Xiao-rong(College of Forestry,Inner Mongolia Agricultural University,Hohhot 010018,China;Inner Mongolia Ecological and Agricultural Meteorological Center,Hohhot 010051,China;Inner Mongolia Meteorology Bureau,Hohhot 010051,China;Hohhot Meteorology Bureau,Hohhot 010000,China)

机构地区：[1]内蒙古农业大学林学院,呼和浩特010018 [2]内蒙古自治区生态与农业气象中心,呼和浩特010051 [3]内蒙古自治区气象局,呼和浩特010051 [4]呼和浩特市气象局,呼和浩特010000

出　　处：《兰州大学学报（自然科学版）》2024年第5期599-604,共6页Journal of Lanzhou University(Natural Sciences)

基　　金：内蒙古自然科学基金项目(2022MS03054);内蒙古自治区气象局科技创新项目(nmqxkjcx202332)。

摘　　要：探究模拟气候变暖对大青山油松人工林凋落物分解的影响.采用开顶式增温室法和原位模拟分解袋法,设置对照和增温两个处理.结果显示经过生长季分解后,增温处理凋落物质量残留率平均损失了初始质量的21.1%,对照组平均损失了初始质量的13.7%;增温显著降低了凋落物氮残留率(以全氮计),显著增加了凋落物磷残留率(以全磷计),增温和对照处理凋落物氮残留率分别为80.05%和94.37%;磷残留率分别为104.33%和96.42%;与对照相比,增温处理下凋落物的c(C)/c(N)、c(C)/c(P)、c(木质素)/c(N)均存在显著差异;增温处理显著增加了林内凋落物的分解系数,增温和对照处理凋落物分解系数分别为0.019和0.011.增温在一定程度上加速了油松林凋落物的分解.The effects of climate warming on the litter decomposition of Pinus tabuliformis plantation in Daqingshan,were investigated via a simulation of climate warming.The open top chamber and in-situ de-composition bag method were applied in the experiment.Control(CK)and increasing temperature treat-ments(W)were set up.The results showed that after decomposition in the growing season,the average loss of litter mass residue rate(R)in W was 21.1%of the initial mass,while that in CK was 13.7%;W sig-nificantly decreased R(N)of litter(in terms of total nitrogen),but significantly increased R(P)in terms of total phosphorus.R(N)of litter treated with W and CK were 80.05%and 94.37%,respectively,R(P)were 104.33%and 96.42%,respectively;compared with the CK,c(C)/c(N)、c(C)/c(P)、c(lignin C)/c(N)were significantly different under W;W significantly increased the litter decomposition coefficient,and the de-composition constant of W and CK treatment were 0.019 and 0.011,respectively.W accelerated the de-composition of litter in Pinus tabuliformis plantation to a certain extent.

关 键 词：模拟增温 开顶式增温室法 大青山 油松人工林 凋落物分解 

分 类 号：Q945.79[生物学—植物学]