南京林业大学学报(自然科学版) ›› 2017, Vol. 41 ›› Issue (04): 80-88.doi: 10.3969/j.issn.1000-2006.201605021
欧晓岚,刘艳红*
出版日期:
2017-08-18
发布日期:
2017-08-18
基金资助:
OU Xiaolan, LIU Yanhong*
Online:
2017-08-18
Published:
2017-08-18
摘要: 【目的】研究植物叶功能性状特征,以了解植物生存的适应性策略。【方法】以松山地区油松天然林及人工林为对象,通过测定不同叶龄油松的比叶面积(SLA)、叶干物质含量(LDMC)、叶氮量(LNC)、叶磷量(LPC)及氮磷比(m(N):m(P),缩写为N/P),得到不同坡向上不同径级油松异龄叶的功能性状特征。【结果】①在天然林和人工林内,不同坡向油松的SLA、LDMC差异均显著(P<0.05),SLA在阴坡较高,而LDMC在阳坡较高。②SLA与LDMC呈显著负相关(P<0.01,其中当年生叶相关系数r=-0.86,往年生叶r=-0.84); LPC与m(N):m(P)呈现显著负相关(P<0.01, 当年生叶r=-0.47,往年生叶r=-0.70); LNC与m(N):m(P)呈显著正相关(当年生叶P<0.05,r=0.23; 往年生叶P<0.01,r=0.45)。③不同发育阶段中,小径级油松的SLA显著高于中、大径级(P<0.05),LDMC趋势则相反,且大径级的LDMC最大。④各径级中当年生叶的LNC和m(N):m(P)均低于往年生叶相应值,但其LPC均比往年生叶的高。【结论】坡向显著影响油松叶对资源和能量的分配策略,阴坡叶的比叶面积性状特征明显,而阳坡叶注重叶干物质含量的积累; 松山地区油松营养限制类型为氮限制,且新叶生长更易受氮限制。异龄叶在不同坡向和各个发育阶段的叶功能性状,表明该地区油松为了最大限度地减少环境的不利影响而采取了适应性权衡对策。
中图分类号:
欧晓岚,刘艳红. 不同坡向及径级油松异龄叶的功能性状[J]. 南京林业大学学报(自然科学版), 2017, 41(04): 80-88.
OU Xiaolan, LIU Yanhong. Effect of age, slope aspects and diameter classes on leaf functional traits of Pinus tabulaeformis in Songshan, Beijing[J].Journal of Nanjing Forestry University (Natural Science Edition), 2017, 41(04): 80-88.DOI: 10.3969/j.issn.1000-2006.201605021.
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