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油茶凋落叶养分及其化学计量特征
陈隆升1,2, 王湘南1,2, 唐 炜,等1,2
1.湖南省林业科学院;2.国家油茶工程技术研究中心
摘要:
【目的】研究油茶凋落叶养分及其化学计量特征的变化规律,为进一步探索油茶养分循环提供依据。【方法】以油茶幼林、成林为研究对象,测定夏季、秋季凋落叶C、N、P、K、Fe、Cu、Mn、Zn等养分含量并分析其养分化学计量特征(C/N、C/P、N/P)。【结果】(1)油茶凋落叶中C、N、P等大量元素含量均受林龄与季节的影响。油茶成林凋落叶中的C含量极显著高于幼林(P<0.01),夏季极显著高于秋季(P<0.01);N、K含量显著高于幼林(P<0.05),但是夏季与秋季之间无显著差异(P>0.05);P含量极显著高于幼林(P<0.01),秋季极显著高于夏季(P<0.01)。(2)幼林凋落叶中的Zn含量显著高于成林(P<0.05),夏季极显著高于秋季(P<0.01);Fe含量以幼林显著高于成林(P<0.05),夏季与秋季无显著差异(P>0.05);Cu含量不受林龄与季节的影响;Mn含量以幼林极显著低于成林(P<0.01),夏季极显著高于秋季(P<0.01)。(3)油茶幼林凋落叶的C/N、 C/P极显著高于成林(P<0.01),而N/P极显著低于成林(P<0.01)。【结论】季节和林龄对油茶凋落叶中的C、N、P、K、Fe、Zn、Mn含量有明显影响,其中幼林凋落叶中的大量元素含量均显著低于成林,并具有较高的C/N、C/P和较低的N/P,说明油茶幼林凋落叶的养分含量较低。
关键词:  油茶  凋落叶  养分  化学计量特征
DOI:
分类号:
基金项目:湖南省自然科学基金项目“湘西北区油茶林养分响应特征规律研究”(2016JJ5001)
Nutrients and their stoichiometric characteristics of Camellia oleifera Abel litters
CHEN Lonsgheng,WANG Xiangnan,TANG Wei,et al
Abstract:
【Objective】The nutrients and their stoichiometric characteristics of Camellia oleifera Abel litters were studied to provide basis for further understanding of the nutrient cycle.【Method】Litter nutrient contents including C,N,P,K,Fe,Cu,Mn and Zn as well as nutrient stoichiometry (C/N,C/P and N/P) of young and mature oil tea camellia forests in summer and autumn were studied.【Result】(1) C,N and P contents were significantly affected by seasons and ages (P<0.01).C content of the mature forest was significantly higher than the young forest (P<0.01),and it was significantly higher in summer than that in autumn (P<0.01).N and K contents of mature forest were significantly higher than that of the young forest (P<0.05),but there was no significant difference between summer and autumn (P>0.05).P content of mature forest was significantly higher than that of the young forest (P<0.01),and it was significantly higher in autumn than in summer (P<0.01).(2) Zn content of young forest litter was significantly higher than that of the mature forest,and it in summer was significantly higher than that in autumn.Fe content of young forest was higher than that of mature forest,and there was no significant difference between summer and autumn.Cu content was not affected by stand age and season.Mn content of the mature forest was very significantly higher than that of the young forest (P<0.01),and it was extremely significant higher in summer than that in autumn (P<0.01).(3) C/N and C/P rations of the young forest was significantly higher than that of the mature forest(P<0.01),and N/P of the young forest was significantly lower than that of the mature forest (P<0.01).【Conclusion】C,N,P,K,Fe,Zn and Mn contents of Camellia oleifera Abel forest litter were significantly affected by stand age and season.The macro element contents of the young forest were significantly lower than that of the mature forest.The young forest also had higher C/N and C/P but lower N/P.
Key words:  Camellia oleifera Abel  litter  nutrient  stoichiometry