基于光合法和生物量法分析塔里木沙漠公路防护林带碳汇估算差异性  

Differences in carbon sink estimation between photosynthetic and biomass methods in the Tarim Desert Highway shelterbelt

作　　者：李汝勇[1] 任久明 雷霆[1] 王克林[1] 刘鹏程[1] 李江涛 LI Ruyong;REN Jiuming;LEI Ting;WANG Kelin;LIU Pengcheng;LI Jiangtao(Tarim Oilfield Company,Korla Xinjiang 841000,China;Xinjiang Hongshan Technology Service Co.,Ltd.,Urumqi 830000,China)

机构地区：[1]中国石油天然气股份有限公司塔里木油田分公司,新疆库尔勒841000 [2]新疆红杉科技服务有限公司,乌鲁木齐830000

出　　处：《新疆农业科学》2024年第8期2014-2022,共9页Xinjiang Agricultural Sciences

基　　金：塔里木油田碳核算模型及指南研究(2023650001000073)。

摘　　要：【目的】研究基于光合法和生物量法分析塔里木沙漠公路防护林带碳汇估算差异性,为干旱荒漠区人工林管护和碳储量的评估提供科学依据。【方法】以新疆塔克拉玛干沙漠公路沿线人工防护林为研究对象,对比光合速率模型和生物量模型,估算防护林带3种主要建林植物各自光合速率及筛选最优生物量模型,进而估算其固碳能力及碳储量。【结果】3种植物在光合固碳模型中,单位叶面积固碳量差异显著,表现为梭梭>沙拐枣>柽柳;3种植物生物量最优模型均为幂函数,预测值与实测值回归决定系数在90%以上。光合固碳法估算得到的沙漠公路防护林带总固碳量为567431.68 t,生物量法估算的值为565083.75 t,2种方法估算得到的固碳量相当。【结论】3种植物固氮量差异显著(梭梭>沙拐枣>柽柳),模型效果精确可靠。【Objective】Desert highway shelterbelts play a major role in wind prevention and sand fixation,as well as oxygen release and carbon fixation.By investigating vegetation along the Tarim Desert Highway and obtaining corresponding measured data,this study aims to further reveal the ecological and environmental effects and artificial ecosystem service functions of desert highway shelterbelts,providing a scientific basis for artificial forest management and carbon storage assessment in arid desert areas.【Methods】In this study,we compared the photosynthetic rate model with the biomass model to estimate the photosynthetic rate and the optimal biomass model of each of the three main forest-building plants in the shelterbelt,and then estimated their carbon sinksink capacity and carbon storage,taking the planted shelterbelt along the highway in the Tarim Desert as an object of study.【Results】There were significant differences in carbon fixation per unit leaf area among the three plants in the photosynthetic carbon fixation model,which were in the order of Haloxylon ammodendron>Calligonum mongolicum>Tamarix ramosissima.The optimal biomass models of the three plants were all power functions.The validation results showed that the regression determination coefficients between the predicted and measured values exceeded 90%,indicating high precision and reliability of the models.The total carbon sfixation of the desert highway shelterbelt estimated by the photosynthetic method was 567,431.68 tons,and the value estimated by the biomass method was 565,083.75 tons,indicating that the carbon sink estimated by the two methods was comparable.【Conclusion】There were significant differences in nitrogen fixation among the 3 species(Haloxylon ammodendron>Calligonum mongolicum>Tamarix ramosissima),indicating high precision and reliability of the models.

关 键 词：光合固碳法 生物量固碳法 碳汇估算 预测模型 

分 类 号：S718[农业科学—林学]