|本期目录/Table of Contents|

[1]何斌,李青,李望军,等.不同林龄华山松针叶氮磷生态化学计量及再吸收特征[J].江苏农业科学,2023,51(20):137-144.
 He Bin,et al.Ecological stoichiometry and reabsorption characteristics of nitrogen and phosphorus in needle leaves of Pinus armandii with different ages[J].Jiangsu Agricultural Sciences,2023,51(20):137-144.
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不同林龄华山松针叶氮磷生态化学计量及再吸收特征(PDF)
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《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第51卷
期数:
2023年第20期
页码:
137-144
栏目:
园艺与林学
出版日期:
2023-10-20

文章信息/Info

Title:
Ecological stoichiometry and reabsorption characteristics of nitrogen and phosphorus in needle leaves of Pinus armandii with different ages
作者:
何斌李青李望军邹顺白晓龙薛晓辉
贵州省典型高原湿地生态保护与修复重点实验室/贵州工程应用技术学院生态工程学院,贵州毕节 551700
Author(s):
He Binet al
关键词:
华山松林龄养分再吸收养分含量化学计量比
Keywords:
-
分类号:
S718.45
DOI:
-
文献标志码:
A
摘要:
分析不同林龄华山松叶片氮(N)和磷(P)再吸收特征及其与叶片、土壤养分指标的关系,探讨华山松生长过程对生境的适应性及养分利用机制。以10、16、22、47年生华山松人工林为研究对象,测定0~20 cm土层土壤、新鲜叶和凋落叶的养分含量,计算并分析叶片N、P再吸收率及其与叶片、土壤养分含量和化学计量特征的关系。结果表明,不同林龄华山松鲜叶N、P含量差异显著(P<0.05),随林龄增加均呈先升高后降低趋势;不同林龄华山松凋落叶N含量差异不显著,P含量差异显著(P<0.05),随林龄的增加均未表现出明显的规律性。不同林龄华山松新鲜叶 N ∶P 比差异不显著(P<0.05),随林龄增加呈先降低后增加趋势。不同林龄华山松N、P的再吸收率存在显著差异(P<0.05),N再吸收率明显小于P再吸收率。N再吸收率与凋落叶N含量呈显著负相关(P<0.05),与土壤有机碳(SOC)呈极显著负相关(P<0.01);P再吸收率与凋落叶P含量、土壤C ∶N和C ∶P呈显著负相关(P<0.05),与土壤速效磷含量呈显著正相关(P<0.05),与土壤N ∶P呈极显著负相关(P<0.01)。该地区华山松的生长受氮素限制更加严重。N、P再吸收率均低于全球尺度上陆地植物的养分重吸收率,但P再吸收效率相对较高,说明华山松养分再吸收率不仅与生境条件有关,还与营养元素的获取途径有关。建议在喀斯特地区华山松人工林抚育管理时适当施加氮肥,以促进华山松的生长发育。
Abstract:
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备注/Memo

备注/Memo:
收稿日期:2023-02-01
基金项目:贵州省科技计划(编号:黔科合基础-ZK[2021]一般231);贵州省教育厅青年科技人才成长项目(编号:黔教合KY字[2022]120、黔教合KY字[2022]123);贵州省毕节市科学技术项目(编号:毕科合重大专项字[2021]1号);贵州省典型高原湿地生态保护与修复重点实验室开放基金项目(编号:毕科联合字贵工程[2021]8号)。
作者简介:何斌(1980—),男,山西朔州人,博士,教授,从事森林生态学和植物生理生态学研究。E-mail:hebin23kewen@163.com。
更新日期/Last Update: 2023-10-20