植物研究 ›› 2021, Vol. 41 ›› Issue (3): 395-407.doi: 10.7525/j.issn.1673-5102.2021.03.010
闫景明1,2, 张世航1, 汪漫1, 杭伟1, 钱申1, 邱东1,2, 陶冶1,2()
收稿日期:
2020-04-19
出版日期:
2021-05-20
发布日期:
2021-03-24
通讯作者:
陶冶
E-mail:xishanyeren@163.com
作者简介:
闫景明(1993—),男,硕士研究生,主要从事植物生态学研究。
基金资助:
Jing-Ming YAN1,2, Shi-Hang ZHANG1, Man WANG1, Wei HANG1, Shen QIAN1, Dong QIU1,2, Ye TAO1,2()
Received:
2020-04-19
Online:
2021-05-20
Published:
2021-03-24
Contact:
Ye TAO
E-mail:xishanyeren@163.com
About author:
YANG Jing-Ming(1993—),male,master student,engaged in plant ecology.
Supported by:
摘要:
为了解我国特有珍稀濒危植物大别山五针松(Pinus dabeshanensis)枝和叶的养分状况及其季节变化特征,连续12个月对其开展野外取样和室内分析,探讨了枝叶N、P、K含量及其化学计量比的动态变化及其在器官间的差异性。结果表明,器官和月份对大别山五针松化学计量特征有显著影响,其中器官的影响最大。枝和叶化学计量特征的季节变化不规律,N∶K变异系数最大(枝叶分别为26.75%和28.00%),其余均属弱变异(变异系数<25%)。叶N、P、K平均含量(10.40、1.43及5.15 mg·g-1)显著高于枝(6.56、1.26及4.80 mg·g-1),叶N∶P(7.27)也显著高于枝(5.18),但枝和叶N∶P均远低于14,呈严重N限制。枝和叶N∶P、N∶K及P∶K分别受制于N、K和K(即相关系数最大)。枝和叶N、P和K之间(枝N-K除外)具有显著的相关性和异速生长关系,其中叶N分配速率高于枝而P分配速率低于枝。降水和温度对枝叶化学计量特征有不同影响。降水量具有明显的时间尺度效应,短时间尺度降水多影响叶而长时间尺度多影响枝。在各时间尺度下,温度均与叶P含量呈显著负相关而与枝K含量呈显著正相关。综合来看,大别山五针松枝、叶间化学计量特征差异显著,且具有明显的季节变异,在一定程度上受降水和温度的影响。
中图分类号:
闫景明, 张世航, 汪漫, 杭伟, 钱申, 邱东, 陶冶. 濒危植物大别山五针松枝叶NPK化学计量特征季节动态[J]. 植物研究, 2021, 41(3): 395-407.
Jing-Ming YAN, Shi-Hang ZHANG, Man WANG, Wei HANG, Shen QIAN, Dong QIU, Ye TAO. Seasonal Dynamics of N,P,and K Stoichiometry in Twigs and Needles of Pinus dabeshanensis,An Endangered Gymnosperm Species[J]. Bulletin of Botanical Research, 2021, 41(3): 395-407.
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