[1]巩闪闪,徐越,冯志培,等. 太行山南麓侧柏人工林土壤酶活性和无机氮含量分布特征[J].西北林学院学报,2020,35(2):1-7.[doi:10.3969/j.issn.1001-7461.2020.02.01]
　GONG Shan-shan,XU Yue,FENG Zhi-pei,et al. Distribution Characteristics of Soil Enzyme Activities and Inorganic Nitrogen Content under Chinese Cypress Artificial Forest in the Southern Taihang Mountains[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2020,35(2):1-7.[doi:10.3969/j.issn.1001-7461.2020.02.01]
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 太行山南麓侧柏人工林土壤酶活性和无机氮含量分布特征()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第35卷
期数:
2020年第2期
页码:
1-7
栏目:
出版日期:
2020-03-31

文章信息/Info

Title:
 Distribution Characteristics of Soil Enzyme Activities and Inorganic Nitrogen Content under Chinese Cypress Artificial Forest in the Southern Taihang Mountains
文章编号:
1001-7461(2020)02-0001-07
作者:
 巩闪闪; 徐越; 冯志培; 胡淦林; 程珂; 孔玉华*
 （河南农业大学 林学院，河南 郑州 450002）
Author(s):
 GONG Shan-shan; XU Yue; FENG Zhi-pei; HU Gan-lin; CHENG Ke; KONG Yu-hua*
 （College of Forestry,Henan Agricultural University,Zhengzhou,Henan 450002,China）
关键词:
 ; 侧柏人工林; 土壤转化酶活性; 土壤脲酶活性; 无机氮含量
Keywords:
 ; Chinese cypress artificial forest;  soil invertase activity;  soil urease activity;  inorganic nitrogen content
分类号:
S714.5
DOI:
10.3969/j.issn.1001-7461.2020.02.01
文献标志码:
A
摘要:
 为研究人工林生态系统土壤酶活性与活性氮周转的相互关系，以太行山南麓地区15 a侧柏人工林下土壤为研究对象，对比分析不同土层土壤转化酶、脲酶活性及土壤铵态氮（NH4+-N）、硝态氮（NO3--N）含量的季节变化特征。结果表明，土壤转化酶、脲酶活性和NH4+-N含量具有明显的季节变化特征（P<0.05），且均在6月达到峰值；土壤转化酶、脲酶活性和NO3--N含量均随土层深度的增加显著降低（P<0.05），相较于0~10 cm土层，20~40 cm的年均降幅均超过25%，呈表层富集现象；线性回归分析表明土壤转化酶和脲酶活性与NH4+-N和NO3--N含量呈显著线性正相关关系（P<0.05），酶活性与土壤无机氮含量的耦合作用在6月表现最强烈（P<0.05），暗示了土壤转化酶与脲酶活性可作为催化剂间接指示有机氮向无机氮的周转能力。
Abstract:
 In order to study the correlation between soil enzyme activities and active nitrogen turn over in the artificial forest ecosystem,a 15-year Chinese cypress plantation occurring in Southern Taihang Mountains were selected as research object.Seasonal variation characteristics of soil invertase activity,urease activity,ammonium nitrogen (NH4+-N) and nitrate nitrogen (NO3--N) contents from different soil layers were analyzed and compared.The results showed that soil invertase activity and urease activity as well as soil NH4+-N content all had clear seasonal variation characteristics (P<0.05),all of them reached the peak values in June.With the increase of soil depth,soil invertase activity,urease activity and NO3--N content all tended to decrease (P<0.05),showing surface enrichment phenomenon.Moreover,compared to 0-10 cm soil layer,the average annual decrease amplitude in 20-40 cm soil layer was more than 25%.Linear regression analysis indicated that the two soil enzyme activities had significantly positive correlation with soil NH4+-N and NO3--N contents (P<0.05).The interaction effects between soil enzyme activities and inorganic N showed the most significant correlation in June (P<0.05),indicating that soil invertase activity and urease activity can be used as catalysts to indirectly indicate the turnover ability from organic nitrogen to inorganic nitrogen.

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备注/Memo

备注/Memo:
 收稿日期：2019-06-05修回日期：2019-10-11
基金项目：国家自然科学基金（41501331，31570613）。
作者简介：巩闪闪，女，硕士在读，研究方向：土壤碳氮循环。E-mail:gss16181618@163.com
*通信作者：孔玉华，女，博士，讲师，硕士生导师，研究方向：土壤碳氮循环与全球气候变化。E-mail:kyh034@hotmail.com
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