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556.71~446.15 g/kg、32.61~18.74 g/kg、3.62~1.26 g/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。
[Objective]Exploring 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. [Method]Taking 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 forestnarrow 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. 62 g/kg to 446. 15,18. 74 and 1. 26 g/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 signi
作者
王树力
郝玉琢
周磊
吴慧
Wang Shuli;Hao Yuzhuo;Zhou Lei;Wu Hui(School of Forestry,Northeast Forestry University,Harbin 150040,Heilongjiang,China)
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2018年第10期24-33,共10页
Journal of Beijing Forestry University
基金
国家重点研发计划项目(2017YFD0601103)
黑龙江省省级财政林业科研专项(201522)
关键词
水曲柳人工林
叶片
季节变化
生态化学计量特征
Fraxinus mandshurica plantation
leaf
seasonal variation
ecological stoichiometriccharacteristics
