Relationship Between Soil Factors and Enzyme Activities in Mangrove Wetland of Dongzhai Port

Chen Xiaohua; Chen Zongzhu; Lei Jinrui; Wu Tingtian; Li Yuanling

doi:10.13961/j.cnki.stbctb.2023.05.010

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Relationship Between Soil Factors and Enzyme Activities in Mangrove Wetland of Dongzhai Port

- Relationship Between Soil Factors and Enzyme Activities in Mangrove Wetland of Dongzhai Port
- Bulletin of Soiland Water Conservation Vol. 43, Issue 5, Pages: 79-86(2023)
- 作者机构：
  
  1. 海南省林业科学研究院(海南省红树林研究院),海南,海口,571100
  2. 海南省热带林业资源监测与应用重点实验室(筹),海南,海口,571100
  3. 海口市湿地保护工程技术研究开发中心,海南,海口,571100
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2023.05.010
  CLC： S714.2
- Published：2023
- 稿件说明：
移动端阅览
Chen Xiaohua, Chen Zongzhu, Lei Jinrui, et al. Relationship Between Soil Factors and Enzyme Activities in Mangrove Wetland of Dongzhai Port[J]. Bulletin of Soiland Water Conservation, 2023, 43(5): 79-86.
DOI：

Chen Xiaohua, Chen Zongzhu, Lei Jinrui, et al. Relationship Between Soil Factors and Enzyme Activities in Mangrove Wetland of Dongzhai Port[J]. Bulletin of Soiland Water Conservation, 2023, 43(5): 79-86. DOI： 10.13961/j.cnki.stbctb.2023.05.010.

摘要

[目的] 红树林是热带、亚热带典型的海岸带湿地生态系统。分析不同植物群落条件下红树林湿地的土壤活性有机碳组成、土壤酶活性现状以及两者间的相互作用，进而预测东寨港红树林片区的生态结构和功能发展趋势，为东寨港红树林湿地的生态恢复与保护提供科学依据。[方法] 通过实地采样，对9种红树植物群落类型〔红海榄(Type 1)、白骨壤(Type 2)、角果木(Type 3)、海莲+角果木(Type 4)、桐花树+海莲+秋茄(Type 5)、海莲+榄李+桐花树(Type 6)、秋茄+海莲+榄李(Type 7)、海莲+无瓣海桑+桐花树+秋茄(Type 8)、海莲+无瓣海桑(Type 9)〕的土壤酶活性、土壤活性有机碳组分含量和理化性质进行化验分析。[结果] ①该区表层土壤有机碳介于6.57~74.87 g/kg之间，在不同群落类型间以Type 7群落显著最高，Type 1群落低至6.57 g/kg。②各群落类型湿地表层土壤酶活性变化规律为：脲酶＞磷酸酶＞过氧化氢酶＞蔗糖酶，其中脲酶以Type 8群落最高，显著高于Type 1—6群落；磷酸酶以Type 8群落最高，显著高于Type 1—3群落；过氧化氢酶以Type 5最高，显著高于其余群落(Type 6和Type 7除外)；蔗糖酶以Type 9群落最高，显著高于Type 2，Type 5和Type 8群落。③土壤脲酶、磷酸酶和过氧化氢酶与土壤活性有机碳各组分含量呈显著及极显著正相关；土壤脲酶、磷酸酶与土壤pH值呈极显著负相关，与全氮、全磷呈极显著正相关；土壤过氧化氢酶与全氮、全磷呈极显著正相关；土壤蔗糖酶与全氮、全磷呈显著正相关。④冗余分析结果显示：土壤轻组有机碳、土壤总有机碳、土壤颗粒有机碳和土壤微生物生物量碳是影响东寨港红树林植物群落土壤酶活性的主要因子。[结论] 土壤酶活性与多种土壤活性有机碳组分呈紧密正相关，因此可用土壤酶活来表征东寨港红树林湿地土壤碳库活跃程度。

Abstract

[Objective] Mangroves are part of a wetland ecosystem found along tropical and sub-tropical coastlines. The soil active organic carbon composition

soil enzyme activity

and the interaction between them

under different plant community conditions was analyzed in order to predict the ecological structure and functional development trend of the mangrove area in Dongzhai Port

and provide a scientific basis for ecological restoration and protection of the mangrove wetland in Dongzhai Port. [Methods] Soil enzyme activity

active organic carbon content in the soil

and physicochemical properties of nine mangrove communities 〔Rhizophora stylosa (Type 1)

Avicennia marina (Type 2)

Ceriops tagal (Type 3)

Bruguiera sexangula + C. tagal (Type 4)

Aegiceras corniculatum + B. sexangula + Kandelia obovata (Type 5)

B. sexangula + Lumnitzera racemose + A. corniculatum (Type 6)

K. obovate + B. sexangula + L. racemose (Type 7)

B. sexangula + Sonneratia apetala + A. corniculatum + K. obovata (Type 8)

B. sexangula + S. apetala (Type 9)〕 were analyzed by field sampling. [Results] Soil organic carbon ranged from 6.57 g/kg to 74.87 g/kg in Dongzhai Port

with Type 7 and Type 1 communities having the highest and lowest soil organic carbon contents

respectively. Enzyme activity of wetland soil in each mangrove community followed the order of urease ＞ phosphatase ＞ catalase ＞ sucrase. Type 8 community had the highest urease activity

significantly higher than Type 1 to Type 6 communities. Moreover

Type 8 community also reported the highest phosphatase activity

which was significantly higher than phosphatase activity for Type 1 to Type 3 communities. On the other hand

catalase activity was highest in Type 5 community

and significantly higher than in the other communities

except Type 6 and Type 7. Type 9 community recorded the highest sucrase activity

which was significantly higher than Type 2

Type 5

and Type 8 communities. Furthermore

it was found that urease

phosphatase

and catalase activities had significant positive correlations with soil organic carbon content. Urease and phosphatase activities were significantly negatively correlated with soil pH value

and significantly positively correlated with total nitrogen (TN) and total phosphorus (TP). Catalase and sucrase activities also had significant positive correlations with TN and TP. The redundancy analysis results indicated that light fraction carbon

total organic carbon

particulate organic carbon

and microbial biomass carbon (MBC) were the main factors affecting soil enzyme activity of mangrove communities in Dongzhai Port. [Conclusion] There was a strong positive correlation between soil enzyme activity and the carbon content of active organic matter. Therefore

soil enzyme activity can be used to characterize the soil carbon pool activity in the mangrove area of Dongzhai Port.

关键词

Keywords

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