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Effects of tree species and topography on soil and microbial biomass stoichiometry in Funiu Mountain, China
BMC Ecology ( IF 3.368 ) Pub Date : 2020-12-09 , DOI: 10.1186/s12898-020-00332-4
Yaowu Tian , Dong Qiao , Shaojun Xu , Ning Wang

Soil and microbial biomass stoichiometry plays an important role in understanding nutrient cycling in terrestrial ecosystems. However, studies on soil and microbial biomass stoichiometry in forests are rare. This study investigated the effect of tree species and topographic factors on the ecological stoichiometry of soil and soil microbial biomass. Three types of forest stands (Quercus variabilis, Larix principis-ruprechtii, and Cotinus coggygria Scop.) in the Beiru River basin of Funiu Mountain were analyzed in September 2018. Six slope positions (sunny bottom slope, sunny middle slope, sunny top slope, shady bottom slope, shady middle slope, and shady top slope) were selected, and the total number of sampling plots was 108. The stoichiometric indices of soil and microbial biomass were determined. At a depth of 0–10 cm, the soil organic C contents in different stands followed the order of C. coggygria (27.7 ± 5.2 g/kg) > Q. variabilis (24.5 ± 4.9 g/kg) > L. principis-ruprechtii (20.8 ± 4.3 g/kg) (P < 0.05). The soil organic C contents at depths of 0–10 cm with different slope aspects and at different slope positions also showed significant differences (P < 0.05). The highest MBC content was observed at the slope bottom (1002 ± 157 mg/kg), whereas the lowest was observed at the slope top (641 ± 98.3 mg/kg). Redundancy analysis showed that the contribution of tree species to these differences was 57.1%, whereas that of topographical factors was 36.2%. Tree species more significantly affected soil nutrients and microbial biomass C, N and P than did topographic factors.

中文翻译:

伏牛山乔木种类和地形对土壤和微生物量化学计量的影响

土壤和微生物生物量化学计量在了解陆地生态系统中养分循环方面起着重要作用。然而,关于森林中土壤和微生物生物量化学计量的研究很少。这项研究调查了树种和地形因素对土壤和土壤微生物生物量的生态化学计量的影响。于2018年9月分析了伏牛山贝鲁河流域的三种林分类型(栎木,落叶松和鲁氏草)。六个坡度(晴天底坡,晴天中坡,晴天顶坡,选择阴影底坡,中间阴影和顶坡,采样点总数为108。确定土壤和微生物生物量的化学计量指数。在0–10厘米的深度,不同林分的土壤有机碳含量依次为小菜蛾(C. coggygria)(27.7±5.2 g / kg)>变异Q.(24.5±4.9 g / kg)>华氏乳杆菌(20.8±4.3 g / kg)( P <0.05)。在不同坡度和不同坡度位置的0-10 cm深度土壤有机碳含量也显示出显着差异(P <0.05)。在斜坡底部观察到最高的MBC含量(1002±157 mg / kg),而在斜坡顶部观察到最低的MBC含量(641±98.3 mg / kg)。冗余分析表明,树种对这些差异的贡献为57.1%,而地形因素的贡献为36.2%。与地形因素相比,树种对土壤养分和微生物生物量碳,氮和磷的影响更大。变异性(24.5±4.9 g / kg)>华氏乳杆菌(20.8±4.3 g / kg)(P <0.05)。在不同坡度和不同坡度位置的0-10 cm深度土壤有机碳含量也显示出显着差异(P <0.05)。在斜坡底部观察到最高的MBC含量(1002±157 mg / kg),而在斜坡顶部观察到最低的MBC含量(641±98.3 mg / kg)。冗余分析表明,树种对这些差异的贡献为57.1%,而地形因素的贡献为36.2%。与地形因素相比,树种对土壤养分和微生物生物量碳,氮和磷的影响更大。变异性(24.5±4.9 g / kg)>华氏乳杆菌(20.8±4.3 g / kg)(P <0.05)。在不同坡度和不同坡度位置的0-10 cm深度,土壤有机碳含量也存在显着差异(P <0.05)。在斜坡底部观察到最高的MBC含量(1002±157 mg / kg),而在斜坡顶部观察到最低的MBC含量(641±98.3 mg / kg)。冗余分析表明,树种对这些差异的贡献为57.1%,而地形因素的贡献为36.2%。与地形因素相比,树种对土壤养分和微生物生物量碳,氮和磷的影响更大。在不同坡度和不同坡度位置的0-10 cm深度土壤有机碳含量也显示出显着差异(P <0.05)。在斜坡底部观察到最高的MBC含量(1002±157 mg / kg),而在斜坡顶部观察到最低的MBC含量(641±98.3 mg / kg)。冗余分析表明,树种对这些差异的贡献为57.1%,而地形因素的贡献为36.2%。与地形因素相比,树种对土壤养分和微生物生物量碳,氮和磷的影响更大。在不同坡度和不同坡度位置的0-10 cm深度土壤有机碳含量也显示出显着差异(P <0.05)。在斜坡底部观察到最高的MBC含量(1002±157 mg / kg),而在斜坡顶部观察到最低的MBC含量(641±98.3 mg / kg)。冗余分析表明,树种对这些差异的贡献为57.1%,而地形因素的贡献为36.2%。与地形因素相比,树种对土壤养分和微生物生物量碳,氮和磷的影响更大。冗余分析表明,树种对这些差异的贡献为57.1%,而地形因素的贡献为36.2%。与地形因素相比,树种对土壤养分和微生物生物量碳,氮和磷的影响更大。冗余分析表明,树种对这些差异的贡献为57.1%,而地形因素的贡献为36.2%。与地形因素相比,树种对土壤养分和微生物生物量碳,氮和磷的影响更大。
更新日期:2020-12-09
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