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[1]余华 潘宗涛 陈志强** 陈志彪 冯柳俊.氮添加对侵蚀退化红壤化学性质及芒萁叶功能性状的影响[J].应用与环境生物学报,2020,26(04):1-11.[doi:10.19675/j.cnki.1006-687x.2019.09061]
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氮添加对侵蚀退化红壤化学性质及芒萁叶功能性状的影响()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
26卷
期数:
2020年04期
页码:
1-11
栏目:
生态系统的环境互作与表生过程专栏
出版日期:
2020-08-25

文章信息/Info

Title:
Effects of nitrogen addition on soil chemical properties and leaf functional traits of Dicranopteris dichotoma in the red soil erosion area of southern China
作者:
余华12 潘宗涛2 陈志强23** 陈志彪23 冯柳俊2
1闽江学院海洋学院地理科学系 福州 350108
2福建师范大学地理科学学院 福州 350007
3湿润亚热带山地生态国家重点实验室培育基地 福州 350007
Author(s):
YU Hua1,2, PAN Zongtao2, CHEN Zhiqiang2,3**, CHEN Zhibiao2,3 & FENG Liujun2
1 Department of Geography, Ocean College, Minjiang University , Fuzhou 350108, China
School of Geographical Sciences, Fujian Normal University , Fuzhou 350007, China
3 Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China
关键词:
氮添加养分有效性土壤酸化叶性状南方红壤侵蚀区芒萁
Keywords:
nitrogen addition nutrient availability soil acidification leaf traits the red soil erosion area of southern China Dicranopteris dichotoma
DOI:
10.19675/j.cnki.1006-687x.2019.09061
摘要:
蕨类植物芒萁(Dicranopteris dichotoma)是我国南方红壤侵蚀区重要的水土保持植物,但目前氮添加对芒萁叶功能性状及其基部土壤化学性质、以及这二者之间关系的影响尚不清楚。以芒萁作为研究对象,采用盆栽实验,设置CK(0 g m-2 a -1)、N1(1.1 g m-2 a -1)、N2(2.3 g m-2 a -1)、N3(3.4 g m-2 a -1)、N4(4.5 g m-2 a -1)、N5(5.6 g m-2 a -1)共6个梯度的氮添加处理,研究氮添加对芒萁主要叶功能性状及其基部土壤主要理化性质的影响,并分析芒萁叶功能性状与土壤化学性质间的相关关系,为南方红壤侵蚀区生态恢复以及可持续发展提供相关科学依据。结果显示,(1)氮添加显著增加土壤全氮、硝态氮和铵态氮含量(P < 0.05),显著降低pH值和全磷含量(P < 0.05),表明氮添加能提高氮素有效性及导致红壤酸化。(2)氮添加显著增大芒萁叶面积、叶绿素含量与叶氮含量(P < 0.05),但未对比叶面积和叶组织密度产生显著影响。(3)芒萁叶面积与土壤pH及其全磷含量呈极显著负相关(P < 0.01),与土壤全氮、铵态氮和硝态氮含量呈显著正相关(P < 0.05);叶氮含量与土壤pH呈极显著负相关(P < 0.01),与土壤全磷含量呈显著负相关(P < 0.05),与土壤全氮、铵态氮和硝态氮含量呈显著正相关(P < 0.05);叶磷含量与土壤pH呈显著正相关(P < 0.05),与土壤全氮、铵态氮和硝态氮含量呈极显著负相关(P < 0.01),与土壤全磷含量相关不明显;叶绿素含量与土壤各化学性质指标均未存在显著相关性。上述结果表明,氮添加会提高退化土壤氮素有效性,促进芒萁对土壤氮素的吸收,导致叶氮含量升高;适度的氮添加会提高叶磷含量,但过量的氮添加则会显著降低叶磷含量。(图1 表3 参62)
Abstract:
Dicranopteris dichotoma, a fern species, is an important soil and water conservation plant in the red soil erosion area of southern China. However, the effects of nitrogen (N) addition on the chemical properties of red soil and plant leaf functional traits, as well as the relationship between them are still poorly understood. Taking D. dichotoma seedlings as the research object, we conducted a pot experiment with 6 gradients of N addition, including CK (0 g m-2 a -1), N1 (1.1 g m-2 a -1), N2 (2.3 g m-2 a -1), N3 (3.4 g m-2 a -1), N4 (4.5 g m-2 a -1), and N5 (5.6 g m-2 a -1). The N addition significantly increased soil total N (STN), nitrate ( NO3--N) and ammonium nitrogen (NH4+-N)contents (P < 0.05), and decreased soil pH value and total phosphorus (P) content (STP) (P < 0.05). It indicated that N deposition could improve N availability and lead to soil acidification. The N addition significantly increased leaf area (LA), chlorophyll?concentrations (Chl) and leaf N contents (LNC) of D. dichotoma (P < 0.05). However, N addition had no significant effects on specific leaf area (SLA) and leaf tissue density (LTD). LA was extremely significantly negatively correlated with pH and STP (P < 0.01), and significantly positively correlated with STN, NH4+-N and NO3--N (P < 0.05). LNC was extremely significantly negatively correlated with pH (P < 0.01), significantly negatively correlated with STP (P < 0.05), and significantly positively correlated with STN, NH4+-N and NO3--N (P < 0.05). LPC was significantly positively correlated with pH (P < 0.05), extremely significantly negatively correlated with STN, NH4+-N and NO3--N (P < 0.01), but had no significant correlation with STP. Chl had no significant correlation with soil chemical properties. It manifested that N addition promoted D. dichotoma to N absorption through increasing the soil N availability, which resulted in increasing LNC. Moderate N addition would increase LPC, but excessive N addition would significantly reduce LPC. Our results provide scientific basis for ecological restoration and sustainable development of the red soil erosion area in southern China.

相似文献/References:

[1]方熊,刘菊秀,张德强,等.降水变化、氮添加对鼎湖山主要森林土壤有机碳矿化和土壤微生物碳的影响[J].应用与环境生物学报,2012,18(04):531.[doi:10.3724/SP.J.1145.2012.00531]
 FANG Xiong,LIU Juxiu,ZHANG Deqiang,et al.Effects of Precipitation Change and Nitrogen Addition on Organic Carbon Mineralization and Soil Microbial Carbon of the Forest Soils in Dinghushan, Southeastern China[J].Chinese Journal of Applied & Environmental Biology,2012,18(04):531.[doi:10.3724/SP.J.1145.2012.00531]
[2]许坛,王华田,王延平,等.杨树人工林土壤养分有效性变化及其与土壤细菌群落演变的相关性[J].应用与环境生物学报,2014,20(03):491.[doi:10.3724/SP.J.1145.2014.11026]
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备注/Memo

备注/Memo:
收稿日期 Received: 2019-09-25 接受日期 Accepted: 2020-01-16
国家自然科学基金项目(41371512)和福建省自然科学基金项目(2017J01462,2018J01479)资助
**通讯作者Corresponding author (E-mail: soiltuqiang061@163.com)
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更新日期/Last Update: 2020-01-21