澳洲坚果树年生长周期固碳特性研究——以密植9龄树为例  

Characteristics of Carbon Sequestration in Macadamia Trees During Their An-nual Growth Cycle-Taking a 9-Year-Old Tree Densely Planted as an Example

作　　者：陈菁[1,2] 宋喜梅 杜丽清[1] 龚同庆 曾辉[1] 王文林 CHEN Jing;SONG Ximei;DU Liqing;GONG Tongqing;ZENG Hui;WANG Wenlin(South Subtropical Crops Research Institute,Chinese Academy of Tropical Agricultural Sciences,Zhanjiang,Guangdong 524091,China;Key Laboratory of Tropical Fruit Tree Biology,Ministry of Agriculture and Rural Affairs,Zhanjiang,Guangdong 524013,China;Guangdong Province South Subtropical Crops Germplasm Nursery,Zhanjiang,Guangdong 524091,China;College of Tropical Crops,Yunnan Agricultural University,Puer,Yunnan 665099,China;Southern Subtropical Agricultural Research Institute of Guangxi,Longzhou,Guangxi 532400,China)

机构地区：[1]中国热带农业科学院南亚热带作物研究所,广东湛江524091 [2]农业农村部热带果树生物学重点实验室,广东湛江524013 [3]广东省南亚热带作物种质资源圃,广东湛江524091 [4]云南农业大学热带作物学院,云南普洱665099 [5]广西南亚热带农业科学研究所,广西龙州532400

出　　处：《热带农业科学》2024年第11期1-6,共6页Chinese Journal of Tropical Agriculture

基　　金：2022年乡村振兴战略专项省级项目资金“澳洲坚果产业链提质增效关键技术研究与示范”;农业农村部物种品种资源保护费项目(No.102125171630060009001);中国热带农业科学院基本科研业务费专项资金(No.16300620-21015)。

摘　　要：为了探明澳洲坚果树年生长周期固碳特性,测定了密植9龄H2、桂热1号2个澳洲坚果品种树年生长周期中不同时期地上部新生器官干物质累积量、碳含量。结果表明:澳洲坚果树地上部新生器官碳含量平均值为42.1%,其中新梢碳含量为42.1%,花穗为40.9%,果实为42.2%,花穗碳含量最低;密植9龄澳洲坚果树地上部每年碳累积量为8 828.6 g/株,折合成每公顷6.30 t;新梢碳累积量占地上部碳累积量的51.6%,花穗占比2.8%,果实占比45.6%,各时期新梢碳累积量占地上部碳累积量比例为:晚秋梢2.1%,冬梢0.9%、春梢14.1%,中夏梢29.6%,晚夏梢4.8%。新梢碳累积以中夏梢、春梢为主。研究结果为评估澳洲坚果经济林固碳能力和碳汇提供了依据。The object of this study was to reveal the characteristics of the carbon fixation ability of macadamia trees during the annual growth cycle.The dry matter accumulation and carbon content of the new aboveground organs of the two densely planted 9-year-old macadamia varieties(H2 and Guire No.1)during the annual growth cycle were measured.The key results are shown as follows:The average value of the carbon content in the aboveground new organs was 42.1%,and that of the new flushes,inflorescences,and fruits was 42.1%,40.9%,and 42.2%,respectively,and that of the inflorescences was the lowest.The annual carbon accumulation of densely planted 9-year-old macadamia trees was 8828.6 g·plant‒1,equivalent to 6.30 t per hectare;The carbon accumulation of new flushes,inflorescences,and fruits accounted for 51.6%,2.8%,and 45.6%of the total carbon accumulation in aboveground new organs,respectively.The carbon accumulation of the late autumn flushes,the winter flushes,the spring flushes,the mid-summer flushes,and the late-summer flushes covered 2.1%,0.9%,14.1%,29.6%,and 4.8%of the total carbon accumulation in aboveground new organs,respectively.The carbon accumulation of new flushes was mainly in the mid-summer flushes and the spring flushes.The research results provide a basis for evaluating the carbon se-questration capacity and carbon sinks of commercial macadamia forests.

关 键 词：澳洲坚果 9龄树 年生长周期 碳累积 碳固定 

分 类 号：S533[农业科学—作物学]