Variation Characteristics of Specific Soil Enzyme Activities During Vegetation Succession on the Loess Plateau

WANG Mei; YAN Ziran; ZHAO Ziwen; WU Yang; CHEN Wenjing; YANG Yixiao; LIU Guobin; XUE Sha

doi:10.13870/j.cnki.stbcxb.2021.05.025

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Variation Characteristics of Specific Soil Enzyme Activities During Vegetation Succession on the Loess Plateau

更新时间：2025-03-12

- Variation Characteristics of Specific Soil Enzyme Activities During Vegetation Succession on the Loess Plateau
- Vol. 35, Issue 5, Pages: 181-187(2021)
- 作者机构：
  
  1. 中国科学院水利部水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌,712100
  2. 中国科学院大学,北京,100049
  3. 西北农林科技大学资源与环境学院, 陕西杨凌,712100
  4. 西北农林科技大学水土保持研究所, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2021.05.025
  CLC： S151.9
- Published：2021
- 稿件说明：
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WANG Mei, YAN Ziran, ZHAO Ziwen, et al. Variation Characteristics of Specific Soil Enzyme Activities During Vegetation Succession on the Loess Plateau[J]. 2021, 35(5): 181-187.
DOI：

WANG Mei, YAN Ziran, ZHAO Ziwen, et al. Variation Characteristics of Specific Soil Enzyme Activities During Vegetation Succession on the Loess Plateau[J]. 2021, 35(5): 181-187. DOI： 10.13870/j.cnki.stbcxb.2021.05.025.

摘要

明确土壤相对酶活性在植被恢复过程中的变化特征及影响因素，对客观揭示植被次生演替过程中微生物活性变化特征具有重要意义。利用时空互代法，选取黄土丘陵区植被次生演替过程中农田、草地、灌木、先锋林和顶级群落5个阶段为研究对象，探讨了β-1，4-葡萄糖苷酶（BG）、纤维二糖水解酶（CBH）、β-木糖苷酶（BX）、N-乙酰-β-D-氨基葡萄糖苷酶（NAG）、亮氨酸氨基肽酶（LAP）、丙氨酸酶转氨酶（ALT）和碱性磷酸酶（AP）7种酶活性变化特征及影响因素。结果表明：在植被次生演替过程中，单位土壤有机碳（SOC）、土壤CBH、BX和NAG酶活性伴随植被次生演替先显著升高后显著降低（P<0.05），并在先锋林阶段达到最高点；单位土壤微生物磷脂脂肪酸（PLFA）的3种酶活性呈现相反趋势，并在顶级群落阶段最高。相关性分析显示，单位SOC和PLFA土壤CBH、BX和NAG酶活性均与土壤pH显著负相关且与土壤DOC显著正相关（P<0.05）；单位SOC和PLFA土壤相对酶活性分别与土壤生物因子显著的正相关和负相关（P<0.05）。冗余分析表明，土壤中磷含量和碳氮含量分别是单位SOC和单位PLFA土壤相对酶活性变化主要驱动因子。研究结果为进一步揭示次生演替过程中土壤养分循环和质量变化提供新的见解。

Abstract

Clarifying the characteristics and influencing factors of specific soil enzyme activities in the process of vegetation restoration is of great significance to objectively revealing the change characteristics of microbial activity in the process of vegetation secondary succession. Based on the method of spatiotemporal interaction

this study selected five stages in the vegetation secondary succession process in the loess hilly region as the research objects

including farmland

grassland

shrubs

pioneer forests and top community stage

and discussed the change characteristics and influencing factors of specific soil enzyme activities of seven enzymes (β-1

4-glucose Glucosidase (BG)

cellobio hydrolase (CBH)

β-xylosidase (BX)

N-acetyl-beta-D-glucosaminidase (NAG)

leucine amino peptide (LAP)

alaninase transaminase (ALT)) and alkaline phosphatase (AP)). The results showed that in the process of vegetation secondary succession

unit soil organic carbon (SOC)

soil CBH

BX and NAG activities increased significantly at first and then decreased significantly (P < 0.05)

and it reached the highest point in the pioneer forest stage; while the activities of three enzymes per unit soil microbial phospholipid fatty acid (PLFA) showed opposite trends (P < 0.05)

and reached the highest level in the top community stage. Correlation analysis showed that soil CBH

BX and NAG enzyme activities per unit SOC and PLFA were significantly negatively correlated with soil pH and significantly positively correlated with soil DOC (P < 0.05); specific soil enzyme activity per unit SOC and PLFA were significantly positively correlated and negatively correlated with soil biological factors

respectively (P < 0.05). Redundancy analysis showed that the phosphorus content as well as the carbon and nitrogen content in the soil were the main driving factor for the change of specific enzyme activity per SOC and PLFA

respectively. This study provided new information for further revealing the soil nutrient cycling and quality changes during the secondary succession process.

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