[1]秦仕忆,喻阳华,邢容容,等.黔西北地区优势树种根区土壤养分特征[J].森林与环境学报,2019,39(02):135-142.[doi:10.13324/j.cnki.jfcf.2019.02.004]
 QIN Shiyi,YU Yanghua,XING Rongrong,et al.Root-zone soil nutrient characteristics of dominant species in the northwestern Guizhou Province[J].,2019,39(02):135-142.[doi:10.13324/j.cnki.jfcf.2019.02.004]
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黔西北地区优势树种根区土壤养分特征()
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《森林与环境学报》[ISSN:2096-0018/CN:35-1327/S]

卷:
39卷
期数:
2019年02期
页码:
135-142
栏目:
出版日期:
2019-03-06

文章信息/Info

Title:
Root-zone soil nutrient characteristics of dominant species in the northwestern Guizhou Province
作者:
秦仕忆1 喻阳华23 邢容容4 王璐1
1. 贵州师范大学地理与环境科学学院, 贵州 贵阳 550025;
2. 贵州师范大学喀斯特研究院, 贵州 贵阳 550001;
3. 国家喀斯特石漠化防治工程技术研究中心, 贵州 贵阳 550001;
4. 贵州大学资源与环境工程学院, 贵州 贵阳 550025
Author(s):
QIN Shiyi1 YU Yanghua23 XING Rongrong4 WANG Lu1
1. School of Geography and Environmental Science, Guizhou Normal University, Guiyang, Guizhou 550025, China;
2. School of Karst Science, Guizhou Normal University, Guiyang, Guizhou 550001, China;
3. State Engineering Technology Institute for Karst Decertification Control, Guiyang, Guizhou 550001, China;
4. School of Resources and Environmental Engineering, Guizhou University, Guiyang, Guizhou 550025, China
关键词:
优树势种供肥强度生态化学计量土壤养分凋落物
Keywords:
dominant speciessupply intensityecological stoichiometrysoil nutrientlitter
分类号:
S757.1
DOI:
10.13324/j.cnki.jfcf.2019.02.004
摘要:
为优化黔西北地区喀斯特退化生态系统群落配置,以该区12个优势树种(亮叶桦、银白杨、云南松、华山松、白栎、毛栗、栓皮栎、川榛、马桑、火棘、金丝桃、杜鹃)为研究对象,运用主成分分析法(PCA)对各优势树种根区土壤pH值、供肥强度以及根区土壤和凋落物的C、N、P生态化学计量特征等指标进行评价,揭示其根区土壤养分特征。结果表明:优势树种根区土壤供N、供P及供K强度的均值分别为5.55%、0.36%和0.66%,总体水平较低;生态化学计量特征整体表现为凋落物>土壤。根区土壤大多呈酸性,对土壤供N、供K强度存在极显著的增强效应(P<0.01),对供P强度无显著效应;供N强度、供K强度显著影响土壤生态化学计量比,而供P强度的影响不显著。华山松凋落物C∶N(138.66)、C∶P(1 311.63)均显著高于其余优势树种,根区土壤供K强度最低;火棘根区土壤pH值、供N及供K强度显著高于其余优势树种,根区土壤与凋落物C∶N、C∶P均处于最低水平。根区土壤养分综合指数为:华山松 > 白栎 > 马桑 > 杜鹃 > 栗 > 云南松 > 银白杨 > 亮叶桦 > 栓皮栎 > 川榛 > 金丝桃 > 火棘。华山松较其它树种有很好的养分蓄存效应。
Abstract:
This study attempts to provide a theoretical basis for vegetation restoration in degraded ecosystems in the northwestern Guizhou Province, through analysis of the characteristics of soil nutrients in the root zones of 12 dominant species and by using principal component analysis to evaluate the soil nutrient status in each ecosystem. The results showed that mean nitrogen (N), phosphorus (P), and potassium (K) supply intensity for the dominant species in the karst plateau were 5.55%, 0.36%, and 0.66%, respectively. The overall N, P, and K supply intensity was relatively lower. The characteristics of ecological stoichiometry exhibited the trend:litter > root zone soil. The soil pH value in the root zone was mostly acidic, which had a significant positive correlation with N and K supply intensity (P<0.01), but not with P supply intensity. There was a significant correlation between N supply intensity, K supply intensity, and the characteristics of ecological stoichiometry, while the effect of P supply intensity was not significant. The integrated nutrient index in the zoot zone soil decreased in the following order:Pinus armandii > Quercus fabr > Coriaria nepalensis > Rhododendron simsii > Castanea mollissima > Pinus yunnanensis > Populus alba > Betula luminifera > Quercus variabilis > Corylus heterophylla > Hypericum monogynum > Pyracantha fortuneana. The integrated fertility index (IFI) value of Pinus armandii was the largest. Its litter C:N ratio and litter C:P ratio were 138.66 and 1 311.63, respectively, which were significantly higher than those of the other species. Pinus armandii had the lowest K supply intensity, with a value of 0.28%. The IFI value of Pyracantha fortuneana was the smallest. Its root zone soil pH, N supply intensity, and K supply intensity were 6.95, 21.31%, and 2.27%, respectively, which were significantly higher than those of the other species. Besides, the root zone soil C:N ratio, root zone soil C:P ratio, litter C:N ratio, and litter C:P ratio of Pyracantha fortuneana were the lowest.The above results showed that Pinus armandii may have a good nutrient retention ability.

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备注/Memo

备注/Memo:
收稿日期:2018-03-21;改回日期:2018-06-07。
基金项目:国家重点研发计划项目课题"喀斯特高原山地石漠化综合治理与混农林业复合经营技术与示范"(2016YFC0502601);贵州省科技计划项目"石漠化区抗冻耐旱型植被建植与恢复关键技术研究"(黔科合LH字[2016]7201号)。
作者简介:秦仕忆(1994-),女,本科生,从事退化生态系统修复研究。Email:15885501304@163.com。
通讯作者:喻阳华(1984-),男,副教授,博士,从事喀斯特环境保护与治理研究。Email:yuyanghua2003@163.com。
更新日期/Last Update: 1900-01-01