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Soil Organic Matter Fractions under Different Vegetation Types in Permafrost Regions along the Qinghai-Tibet Highway, North of Kunlun Mountains, China
  • ISSN号:1004-5759
  • 期刊名称:《草业学报》
  • 时间:0
  • 分类:S152.7[农业科学—土壤学;农业科学—农业基础科学] Q948.15[生物学—植物学]
  • 作者机构:[1]Cryosphere Research Station on Qinghai-Tibet Plateau, State Key laboratory of Cryospheric Sciences, Cold andArid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China, [2]University of Chinese Academy of Sciences, Beijing 100049, China, [3]Naiman Desertification Research Station, Cold andArid Regions Environmental and Engineering Research Institute, Chinese Aeademy of Sciences, Lanzhou 730000, China
  • 相关基金:financially supported by the National Major Scientific Project of China“Cryospheric Change and Impacts Research”program“Research of permafrost hydrothermal process and its response to climate change"(Grant No.2013CBA01803);supported in part by Science Fund for Creative Research Groups of the National Natural Science Foundation of China(Grant No.41121001);the National Natural Science Foundation of China(Grant No.41101055);the West Light Foundation of the Chinese Academy of Sciences;the Foundation for Excellent Youth Scholars of Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences
中文摘要:

作为土壤质量的一个关键属性,玷污有机物(SOM ) ,它的不同部分在调整土壤营养素骑车和土壤性质起一个重要作用。这研究在不同 SOM 部分评估了土壤碳(C) 和氮(N) 集中(光 -- 并且重部分,微生物引起的生物资源) 在不同植被类型下面并且在 Kunlun 山的北方沿着 Qinghai 西藏高速公路在连续永久冻土区域分析了他们的影响因素,中国。土壤样品在四种植被类型下面在坑被收集高山的沼泽地草地(ASM ) ,高山的草地(AM ) ,高山的大草原(作为) 并且在 0-50 的深度的高山的沙漠(广告) 厘米。植被范围在 ASM 和 AM 是最高的,列在后面由作为并且广告。结果显示轻部分碳(LFC ) 和氮(LFN ) 的集中,和微生物引起的生物资源碳(MBC ) 和氮(MBN ) 如下减少了:ASM > AM > 作为 > 广告与 LFC 的相对更强壮的减少,而重部分碳(HFC ) 和氮(HFN ) 集中比在 AD 土壤作为土壤更低在里面。在在 ASM 土壤下面的 0-10 厘米深度的 LFC/SOC 和 MBC/SOC 的相对更高的比例主要从它的更高的底层输入和土壤潮湿内容被结果。关联分析表明了那未葬生物资源,土壤潮湿内容,土壤当 pH 否定地相关到 LFC, LFN, HFC, HFN, MBC 和 MBN 时,器官的碳(SOC ) 和全部的氮(TN ) 断然相关到 LFC, LFN, HFC, HFN, MBC 和 MBN。在活跃的层厚度和 SOM 部分之间没有关系,除了 LFC。结果建议了那个植被封面,土壤潮湿内容,和 SOC, TN 集中显著地与 SOM 部分的数量和可获得性被相关,当永久冻土在中央 Qinghai 西藏高原的永久冻土区域在 SOM 部分上有更少的影响时。

英文摘要:

As a key attribute of soil quality, soil organic matter(SOM) and its different fractions play an important role in regulating soil nutrient cycling and soil properties.This study evaluated the soil carbon(C) and nitrogen(N) concentrations in different SOM fractions(light– and heavy fractions,microbial biomass) under different vegetation types and analyzed their influencing factors in continuous permafrost regions along the Qinghai-Tibet Highway in the North of Kunlun Mountains, China.Soil samples were collected in pits under four vegetation types — Alpine swamp meadow(ASM), Alpine meadow(AM), Alpine steppe(AS) and Alpine desert(AD) — at the depth of 0-50 cm.The vegetation coverage was the highest at ASM and AM, followed byAS and AD.The results indicated that the concentrations of light fraction carbon(LFC) and nitrogen(LFN), and microbial biomass carbon(MBC)and nitrogen(MBN) decreased as follows: ASM 〉 AM 〉AS 〉 AD, with the relatively stronger decrease of LFC,whereas the heavy fraction carbon(HFC) and nitrogen(HFN) concentrations were lower in AS soils than in the AD soils.The relatively higher proportions of LFC/SOC and MBC/SOC in the 0-10 cm depth under the ASM soils are mainly resulted from its higher substrate input and soil moisture content.Correlation analysis demonstrated that aboveground biomass, soil moisture content, soil organic carbon(SOC) and total nitrogen(TN) positively correlated to LFC, LFN, HFC, HFN, MBC and MBN, while p H negatively correlated to LFC, LFN, HFC, HFN, MBC and MBN.There was no relationship between active layer thickness and SOM fractions, except for the LFC.Results suggested that vegetation cover, soil moisture content, and SOC and TN concentrations were significantly correlated with the amount and availability of SOM fractions, while permafrost had less impact on SOM fractions in permafrost regions of the central Qinghai–Tibet Plateau.

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期刊信息
  • 《草业学报》
  • 北大核心期刊(2011版)
  • 主管单位:中国科学技术学会
  • 主办单位:中国草学会 兰州大学
  • 主编:南志标
  • 地址:兰州市嘉峪关西路768号
  • 邮编:730020
  • 邮箱:cyxb@lzu.edu.cn
  • 电话:0931-8913494
  • 国际标准刊号:ISSN:1004-5759
  • 国内统一刊号:ISSN:62-1105/S
  • 邮发代号:54-84
  • 获奖情况:
  • 获2002年“百种中国杰出学术期刊”奖
  • 国内外数据库收录:
  • 英国农业与生物科学研究中心文摘,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版)
  • 被引量:23243