不同森林群落类型土壤蚯蚓数量和生物量的时空分布特征

发布时间：2018-05-03 06:18

  本文选题：云南松群落 + 桉树群落　； 参考：《南京林业大学学报(自然科学版)》2017年03期

【摘要】：【目的】明确不同森林群落类型对其土壤蚯蚓数量(密度)及生物量时空动态的影响。【方法】采用电击法研究了云南省昆明市3种森林群落类型的土壤蚯蚓密度与生物量的时空分布规律,用相关分析与方差分析方法,分析3种森林类型的样地土壤理化环境与蚯蚓密度及生物量变化的相关性。【结果】(1)森林群落类型显著影响蚯蚓密度(P=0.001)和生物量(P=0.006),各森林群落类型下土壤蚯蚓密度与生物量的大小顺序分别为:云南松群落桉树群落疏林群落、云南松群落疏林群落桉树群落。(2)蚯蚓密度和生物量时间变化总体上表现为:9月10月11月。垂直分布表现为:桉树群落与云南松群落蚯蚓及生物量主要分布在≥5~10 cm土层,而疏林群落主要集中于0~5 cm土层。(3)桉树群落土壤温度、pH及水解氮与蚯蚓密度和生物量呈显著正相关关系(P0.05);土壤含水量、有机质、全氮等与蚯蚓密度及生物量变化趋势基本一致,但它们与蚯蚓密度及生物量的相关性未达到显著水平;云南松群落和疏林群落下蚯蚓密度及生物量与土壤温度显著相关(P0.05),而与土壤含水量、有机质、全氮、水解氮等相关性不显著。【结论】3种森林群落类型中土壤蚯蚓密度及生物量的时空分布具有显著的差异性,这种差异性与样地土壤理化环境(温度、水分、pH、土壤氮等)的变化密切相关。
[Abstract]:[objective] to determine the effect of different forest community types on soil earthworm population (density) and temporal and spatial dynamics of soil earthworm biomass. [methods] the density of soil earthworms in three forest communities in Kunming, Yunnan Province was studied by electric shock method. Temporal and spatial distribution of degree and biomass, By means of correlation analysis and variance analysis, The correlation between soil physical and chemical environment and the change of earthworm density and biomass in three forest types was analyzed. [results] the forest community type significantly affected the density of earthworm P0. 001) and the biomass of P0. 006. The order of density and biomass were as follows: Pinus yunnanensis community, eucalyptus community, open forest community, The change of density and biomass of earthworm in open forest community of Pinus yunnanensis was as follows: October, October, November, September. The vertical distribution showed that the earthworms and biomass of eucalyptus community and Pinus yunnanensis community were mainly distributed in the soil layer of 鈮，

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