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    王树力, 郝玉琢, 周磊, 吴慧. 水曲柳人工林树木叶片营养元素及其化学计量特征的季节动态[J]. 北京林业大学学报, 2018, 40(10): 24-33. DOI: 10.13332/j.1000-1522.20180170
    引用本文: 王树力, 郝玉琢, 周磊, 吴慧. 水曲柳人工林树木叶片营养元素及其化学计量特征的季节动态[J]. 北京林业大学学报, 2018, 40(10): 24-33. DOI: 10.13332/j.1000-1522.20180170
    Wang Shuli, Hao Yuzhuo, Zhou Lei, Wu Hui. Seasonal variations of leaf nutrient element concentrations and their stoichiometric characteristics in Fraxinus mandshurica plantations[J]. Journal of Beijing Forestry University, 2018, 40(10): 24-33. DOI: 10.13332/j.1000-1522.20180170
    Citation: Wang Shuli, Hao Yuzhuo, Zhou Lei, Wu Hui. Seasonal variations of leaf nutrient element concentrations and their stoichiometric characteristics in Fraxinus mandshurica plantations[J]. Journal of Beijing Forestry University, 2018, 40(10): 24-33. DOI: 10.13332/j.1000-1522.20180170

    水曲柳人工林树木叶片营养元素及其化学计量特征的季节动态

    Seasonal variations of leaf nutrient element concentrations and their stoichiometric characteristics in Fraxinus mandshurica plantations

    • 摘要:
      目的探究水曲柳及其混交树种长白落叶松、红皮云杉、红松叶片C、N、P含量及其化学计量特征的季节动态,为水曲柳人工林的优化经营提供理论依据。
      方法以东北林业大学森林培育实验站天然林窄带状皆伐后营造的29年生水曲柳纯林、水曲柳长白落叶松混交林、水曲柳红皮云杉混交林和水曲柳红松混交林为对象,利用野外取样调查与室内实验分析相结合的方法,分析水曲柳人工林叶片C、N、P含量及其化学计量特征的季节变化。
      结果(1) 生长季内水曲柳叶片C、N、P含量的总体变化趋势是逐渐降低,变化范围为556.71~446.15g/kg、32.61~18.74g/kg、3.62~1.26g/kg;C/N、C/P、N/P的总体变化趋势是逐渐升高,变化范围为17.06~23.81、150.60~350.56、9.10~16.98。(2)混交树种长白落叶松、红皮云杉和红松叶片C含量及红皮云杉与红松叶片N、P含量呈波动态势,长白落叶松叶片N、P含量逐渐降低;长白落叶松叶片的C/N和C/P平稳升高,红皮云杉叶片的C/N和C/P连续下降,红松叶片的C/N和C/P呈波动态势。长白落叶松和红松叶片的N/P先升高后降低,红皮云杉叶片的N/P先下降后平稳。(3)水曲柳和长白落叶松叶片的N、P含量显著高于红皮云杉和红松叶片的N、P含量,C/N和C/P显著低于红皮云杉和红松叶片的C/N和C/P。
      结论培育水曲柳长白落叶松混交林和水曲柳纯林优于培育水曲柳红松混交林和水曲柳红皮云杉混交林,培育过程中应注意在生长季初期保证林地氮肥的数量,中期注意补充林地的氮肥和磷肥。

       

      Abstract:
      ObjectiveExploring seasonal dynamics of C, N, P concentrations and their ecological stoichiometric characteristics in Fraxinus mandshurica, Larix olgensis, Picea koraiensis, Pinus koraiensis leaves, this paper aims to provide theoretical basis to the optimization management of Fraxinus mandshurica plantations.
      MethodTaking 29 years of pure Fraxinus mandshurica plantation, Fraxinus mandshurica×Larix olgensis mixed plantation, Fraxinus mandshurica× Picea koraiensis mixed plantation and Fraxinus mandshurica× Pinus koraiensis mixed plantation, which were planted on the natural forest narrow strip clear cutting land in the Forest Cultivation Experiment Station of Northeast Forestry University as materials, using the method of combining field investigation and experimental analysis, the seasonal dynamics of leaf C, N, P concentrations and their ecological stoichiometric characteristics were studied.
      Result(1) Total trend of C, N and P concentrations in Fraxinus mandshurica leaves of Fraxinus mandshurica plantations was gradually reduced from 556.71, 32.61 and 3.62g/kg to 446.15, 18.74 and 1.26g/kg, respectively, and that of C/N, D/P and N/P in Fraxinus mandshurica leaves of Fraxinus mandshurica plantations was gradually increased from 17.06, 150.60 and 9.10 to 23.81, 350.56 and 16.98, respectively. (2) C concentration in the leaves of mixed Larix olgensis, Picea koraiensis and Pinus koraiensis was fluctuations, so did the N concentration and P concentration in the leaves of Picea koraiensis and Pinus koraiensis. N and P concentrations in the leaves of Larix olgensis reduced gradually. While C/N and C/P in the leaves of Larix olgensis rose steadily, C/N and C/P in the leaves of Picea koraiensis continuous declined, C/N and C/P in the leaves of Pinus koraiensis fluctuated. While N/P in the leaves of Larix olgensis and Pinus koraiensis declined after rising first, that of Picea koraiensis declined before it was smooth. (3) N and P concentrations in the leaves of Fraxinus mandshurica and Larix olgensis were significantly higher than those of Picea koraiensis and Pinus koraiensis, C/N and C/P of which were significantly lower than those of Picea koraiensis and Pinus koraiensis.
      ConclusionCultivating mixed Fraxinus mandshurica × Larix olgensis plantation and pure Fraxinus mandshurica plantation should be better than cultivating mixed Fraxinus mandshurica× Picea koraiensis plantation and mixed Fraxinus mandshurica × Pinus koraiensis plantation. Enough nitrogen fertilizer should be ensured in the beginning of growth season. Suitable nitrogen and phosphorus fertilizer should be used in the middle growing season.

       

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