Hang Jing , Jing Wang , Guoliang Wang , Guobin Liu , Yi Cheng
{"title":"油松人工林林下植被对土壤微生物特性的影响大于林冠植被","authors":"Hang Jing , Jing Wang , Guoliang Wang , Guobin Liu , Yi Cheng","doi":"10.1016/j.agee.2023.108763","DOIUrl":null,"url":null,"abstract":"<div><p>Forest ecosystem is a complex community, and its soil microbes play a vital role in global matter cycling. However, the patterns of rhizosphere soil microbial characteristics among tree-shrub-grass and their responses to nitrogen (N) deposition are still unclear. This study evaluated the microbial biomasses, processes (gas fluxes), and enzyme activities in the rhizosphere soils of tree (<em>Pinus tabuliformis</em>), shrub (<em>Rosa xanthina</em>), and grass (<em>Carex lanceolata</em>) and their responses to N addition (0, 3, 6, 9 g N m<sup>−2</sup> y<sup>−1</sup> corresponding to N0, N3, N6, N9) in a <em>P. tabuliformis</em> plantation. (1) Microbial biomass carbon (MBC), microbial biomass nitrogen (MBN), microbial biomass phosphorus (MBP) contents, as well as CO<sub>2</sub>, CH<sub>4</sub> flux rates in the rhizosphere soil of <em>C. lanceolata</em> were significantly higher than those in the rhizosphere soils of <em>P. tabuliformis</em> and <em>R. xanthina</em> (<em>P</em> < 0.05). The activities of alkaline phosphatase (ALT), leucine aminopeptidase (LAP), β-glucosidase (BG), <span>D</span>-cellulosidase (CBH), N-acetyl-glucosaminidase (NAG), and xylosidase (XYL) in the rhizosphere soils of <em>C. lanceolata</em> and <em>R. xanthina</em> were significantly higher than those in the rhizosphere soil of <em>P. tabuliformis</em>. (2) Soil MBC content, N<sub>2</sub>O, and CH<sub>4</sub> flux rates increased after N addition, while the CO<sub>2</sub> flux rate decreased. MBP content initially increased and then reduced with N additions, and the maximum values observed in N3 or N9 treatments. (3) In the rhizosphere soil of <em>P. tabuliformis</em>, N addition enhanced the NAG, BG, CBH, and XYL activities. While low N increased and high N decreased these enzyme activities in the rhizosphere soils of <em>C. lanceolata</em> and <em>R. xanthina</em>, with the maximum values obtained in N3 treatment. (4) N addition directly reduced the CO<sub>2</sub> flux rate and indirectly enhanced the gas flux rate by increasing soil MBC and MBP contents. Species change indirectly affected the microbial biomass and enzyme activity by altering soil chemical properties, which eventually affected gas flux rates. Our study emphasizes the effects of tree-shrub-grass on soil microbial characteristics, which can improve the evaluation of soil ecological processes and responses to N deposition in forest ecosystems.</p></div>","PeriodicalId":7512,"journal":{"name":"Agriculture, Ecosystems & Environment","volume":"360 ","pages":"Article 108763"},"PeriodicalIF":6.0000,"publicationDate":"2023-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Understory vegetation had important impact on soil microbial characteristics than canopy tree under N addition in a Pinus tabuliformis plantation\",\"authors\":\"Hang Jing , Jing Wang , Guoliang Wang , Guobin Liu , Yi Cheng\",\"doi\":\"10.1016/j.agee.2023.108763\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Forest ecosystem is a complex community, and its soil microbes play a vital role in global matter cycling. However, the patterns of rhizosphere soil microbial characteristics among tree-shrub-grass and their responses to nitrogen (N) deposition are still unclear. This study evaluated the microbial biomasses, processes (gas fluxes), and enzyme activities in the rhizosphere soils of tree (<em>Pinus tabuliformis</em>), shrub (<em>Rosa xanthina</em>), and grass (<em>Carex lanceolata</em>) and their responses to N addition (0, 3, 6, 9 g N m<sup>−2</sup> y<sup>−1</sup> corresponding to N0, N3, N6, N9) in a <em>P. tabuliformis</em> plantation. (1) Microbial biomass carbon (MBC), microbial biomass nitrogen (MBN), microbial biomass phosphorus (MBP) contents, as well as CO<sub>2</sub>, CH<sub>4</sub> flux rates in the rhizosphere soil of <em>C. lanceolata</em> were significantly higher than those in the rhizosphere soils of <em>P. tabuliformis</em> and <em>R. xanthina</em> (<em>P</em> < 0.05). The activities of alkaline phosphatase (ALT), leucine aminopeptidase (LAP), β-glucosidase (BG), <span>D</span>-cellulosidase (CBH), N-acetyl-glucosaminidase (NAG), and xylosidase (XYL) in the rhizosphere soils of <em>C. lanceolata</em> and <em>R. xanthina</em> were significantly higher than those in the rhizosphere soil of <em>P. tabuliformis</em>. (2) Soil MBC content, N<sub>2</sub>O, and CH<sub>4</sub> flux rates increased after N addition, while the CO<sub>2</sub> flux rate decreased. MBP content initially increased and then reduced with N additions, and the maximum values observed in N3 or N9 treatments. (3) In the rhizosphere soil of <em>P. tabuliformis</em>, N addition enhanced the NAG, BG, CBH, and XYL activities. While low N increased and high N decreased these enzyme activities in the rhizosphere soils of <em>C. lanceolata</em> and <em>R. xanthina</em>, with the maximum values obtained in N3 treatment. (4) N addition directly reduced the CO<sub>2</sub> flux rate and indirectly enhanced the gas flux rate by increasing soil MBC and MBP contents. Species change indirectly affected the microbial biomass and enzyme activity by altering soil chemical properties, which eventually affected gas flux rates. Our study emphasizes the effects of tree-shrub-grass on soil microbial characteristics, which can improve the evaluation of soil ecological processes and responses to N deposition in forest ecosystems.</p></div>\",\"PeriodicalId\":7512,\"journal\":{\"name\":\"Agriculture, Ecosystems & Environment\",\"volume\":\"360 \",\"pages\":\"Article 108763\"},\"PeriodicalIF\":6.0000,\"publicationDate\":\"2023-10-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Agriculture, Ecosystems & Environment\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S016788092300422X\",\"RegionNum\":1,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"AGRICULTURE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Agriculture, Ecosystems & Environment","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S016788092300422X","RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRICULTURE, MULTIDISCIPLINARY","Score":null,"Total":0}
Understory vegetation had important impact on soil microbial characteristics than canopy tree under N addition in a Pinus tabuliformis plantation
Forest ecosystem is a complex community, and its soil microbes play a vital role in global matter cycling. However, the patterns of rhizosphere soil microbial characteristics among tree-shrub-grass and their responses to nitrogen (N) deposition are still unclear. This study evaluated the microbial biomasses, processes (gas fluxes), and enzyme activities in the rhizosphere soils of tree (Pinus tabuliformis), shrub (Rosa xanthina), and grass (Carex lanceolata) and their responses to N addition (0, 3, 6, 9 g N m−2 y−1 corresponding to N0, N3, N6, N9) in a P. tabuliformis plantation. (1) Microbial biomass carbon (MBC), microbial biomass nitrogen (MBN), microbial biomass phosphorus (MBP) contents, as well as CO2, CH4 flux rates in the rhizosphere soil of C. lanceolata were significantly higher than those in the rhizosphere soils of P. tabuliformis and R. xanthina (P < 0.05). The activities of alkaline phosphatase (ALT), leucine aminopeptidase (LAP), β-glucosidase (BG), D-cellulosidase (CBH), N-acetyl-glucosaminidase (NAG), and xylosidase (XYL) in the rhizosphere soils of C. lanceolata and R. xanthina were significantly higher than those in the rhizosphere soil of P. tabuliformis. (2) Soil MBC content, N2O, and CH4 flux rates increased after N addition, while the CO2 flux rate decreased. MBP content initially increased and then reduced with N additions, and the maximum values observed in N3 or N9 treatments. (3) In the rhizosphere soil of P. tabuliformis, N addition enhanced the NAG, BG, CBH, and XYL activities. While low N increased and high N decreased these enzyme activities in the rhizosphere soils of C. lanceolata and R. xanthina, with the maximum values obtained in N3 treatment. (4) N addition directly reduced the CO2 flux rate and indirectly enhanced the gas flux rate by increasing soil MBC and MBP contents. Species change indirectly affected the microbial biomass and enzyme activity by altering soil chemical properties, which eventually affected gas flux rates. Our study emphasizes the effects of tree-shrub-grass on soil microbial characteristics, which can improve the evaluation of soil ecological processes and responses to N deposition in forest ecosystems.
期刊介绍：
Agriculture, Ecosystems and Environment publishes scientific articles dealing with the interface between agroecosystems and the natural environment, specifically how agriculture influences the environment and how changes in that environment impact agroecosystems. Preference is given to papers from experimental and observational research at the field, system or landscape level, from studies that enhance our understanding of processes using data-based biophysical modelling, and papers that bridge scientific disciplines and integrate knowledge. All papers should be placed in an international or wide comparative context.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
