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[1]自海云 姜永雷 程小毛 王鸿东 黄晓霞**.千家寨不同海拔野生古茶树根际土壤微生物胞外酶活性特征[J].应用与环境生物学报,2021,27(01):1-13.[doi:10.19675/j.cnki.1006-687x.2020.03046]
 ZI Haiyun,JIANG YongLei,CHEN Xiaomao,et al.Microbial extracellular enzyme activity in rhizosphere soil of ancient wild tea tree at different altitudes in Qianjiazhai Reserve*[J].Chinese Journal of Applied & Environmental Biology,2021,27(01):1-13.[doi:10.19675/j.cnki.1006-687x.2020.03046]
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千家寨不同海拔野生古茶树根际土壤微生物胞外酶活性特征()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
27卷
期数:
2021年01期
页码:
1-13
栏目:
研究论文
出版日期:
2021-02-25

文章信息/Info

Title:
Microbial extracellular enzyme activity in rhizosphere soil of ancient wild tea tree at different altitudes in Qianjiazhai Reserve*
作者:
自海云1 姜永雷2 程小毛1 王鸿东3 黄晓霞1**
1西南林业大学园林园艺学院 国家林业与草原局西南风景园林工程技术研究中心 昆明 650224
2云南省烟草农业科学研究院烟草农艺研究中心 昆明 650021
3云南哀牢山国家级自然保护区镇沅管护局 普洱 666500
Author(s):
ZI Haiyun1 JIANG YongLei2 CHEN Xiaomao1 WANG Hongdong & HUANG Xiaoxia1**
1 College of Landscape and Horticulture, Southwest Forestry University , Southwest Landscape Architecture Engineering Research Center of State Forestry and Grassland Administration, Kunming 650224, China
2Tobacco Agronomic Research Center, Yunnan Academy of Tobacco Agriculture Science, Kunming 650021, China
3 Zhenyuan Management and Protection Bureau of Ailao Mountain National Nature Reserve in Yunnan Province , Puer 666500, China
关键词:
海拔梯度野生古茶树根际土壤胞外酶计量学微生物量
DOI:
10.19675/j.cnki.1006-687x.2020.03046
摘要:
野生古茶树是亟需保护的珍稀种质资源。为了解野生古茶树根际土壤碳氮磷生态化学计量、微生物量碳氮和胞外酶活性的垂直分布格局,以千家寨野生古茶树群落为对象,采集千家寨4个海拔2050 m(E1)、2200 m(E2)、2350 m(E3)、2500 m(E4)的野生古茶树群落的根际土壤,测定并分析其碳氮磷生态化学计量(C、N、P)、微生物量碳和氮(MBC & MBN )和胞外酶活性[磷素获取酶—碱性磷酸酶(AKP)、碳素获取酶—β-1, 4-葡萄糖苷酶(βG)、氮素获取—β-1, 4-N-乙酰基氨基葡萄糖苷酶(NAG)和水解酶亮氨酸氨基肽酶(LAP)、多酚氧化酶(PPO)、过氧化物酶(PER)]的变化及其影响因素。结果显示,千家寨野生古茶树根际土壤C:N较高(11.27-13.35),并随海拔升高而增加;C:P和N:P均随海拔升高呈先升高后降低的变化规律。根际土壤MBC和MBN随海拔升高呈先上升后下降的规律,分别受根际土壤含水量和铵态氮(NH4+)的影响。根际土壤AKP、βG和NAG活性随海拔升高均显著增加并与总磷含量(TP)密切相关,LAP活性在海拔上无显著变化,PPO活性随海拔升高而显著下降(P < 0.05)。根际土壤胞外酶活性生态化学计量大小顺序是βG:(NAG + LAP) > βG :AKP > (NAG + LAP):AKP,其中βG:AKP和(NAG + LAP): AKP值均小于1。综上所述,不同海拔梯度上土壤碳氮磷生态化学计量、微生物量碳氮和胞外酶活性及其计量学差异显著,而TP是影响海拔梯度上野生古茶树根际土壤胞外酶活性大小的关键因子;千家寨野生古茶树根际土壤微生物受磷限制和碳限制相对于氮限制程度更高,在不同海拔中受碳氮磷限制的程度有差异;研究结果对了解野生古茶树的养分循环和生态适应机制有重要意义。

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备注/Memo

备注/Memo:
收稿日期 Received: 2020-03-22 接受日期 Accepted: 2020-05-19
国家自然科学基金项目(31760197)和部级重点学科、省高校重点实验室和校实验室共享平台项目资助Supported by the National Natural Science Foundation of China (31760197) and Ministry-level key disciplines, provincial key laboratories and school laboratories sharing platform-funded projects
**通讯作者 Corresponding author (E-mail: huangxx@swfu.edu.cn)
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更新日期/Last Update: 2020-05-22