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[Effects of drying-rewetting on leaf litter decomposition and nutrient releases in forest plantations in Horqin Sandy Land, China].

Identifieur interne : 001112 ( Main/Exploration ); précédent : 001111; suivant : 001113

[Effects of drying-rewetting on leaf litter decomposition and nutrient releases in forest plantations in Horqin Sandy Land, China].

Auteurs : Jin Tao Li [République populaire de Chine] ; Xue Kai Sun [République populaire de Chine] ; Ya Lin Hu [République populaire de Chine] ; Shan Yu Zhao [République populaire de Chine] ; De Hui Zeng [République populaire de Chine]

Source :

RBID : pubmed:29745134

Descripteurs français

English descriptors

Abstract

Soil drying-rewetting is a common phenomenon in arid and semi-arid regions. Under the background of global climate change, it is predicted that the intensity of soil drying-rewetting cycle in Horqin Sandy Land will be further strengthened in the future. In this study, we conducted an in-situ soil column incubation experiment for 180 days to investigate the effects of soil drying-rewetting on leaf litter decomposition and nutrient releases of Populus simonii and Pinus sylvestris var. mongo-lica in Horqin Sandy Land. There were three treatments: Constantly moist treatment (CM, 60% water holding capacity during whole incubation period), mild drying-rewetting treatment (DW1, gra-dual drought for 10 days plus 60% WHC for 20 days) and heavy drying-rewetting treatment (DW2, gradual drought for 20 days plus 60% WHC for 10 days). To evaluate their delayed effects, leaf litter in all three treatments were incubated for 60 days under same and constant humid condition (60% WHC) after four cycles of soil drying-rewetting. The responses of litter decomposition to soil drying-rewetting cycles and nutrient releases of P. simonii and P. sylvestris var. mongolica were similar during the drying and rewetting period. Litter mass loss and the release of C, lignin and total phenol were decreased by 17.4%, 23.8%, 35.2% and 32.7% in DW2 treatment compared with CM treatment. There was no significant difference in release of leaf litter N or P among the drying-rewetting treatments. There were consistent changes of litter mass loss and nutrient releases among the treatments at the end of drying-rewetting and delayed incubation period. However, litter decomposition rate and litter C and lignin release rates were increased in DW2 treatment compared with CM treatment during the delayed incubation period, indicating a short-term delayed effect.

DOI: 10.13287/j.1001-9332.201706.033
PubMed: 29745134


Affiliations:


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Le document en format XML

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<term>Desert Climate (MeSH)</term>
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<term>Forests (MeSH)</term>
<term>Plant Leaves (MeSH)</term>
<term>Soil (MeSH)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr">
<term>Chine (MeSH)</term>
<term>Climat désertique (MeSH)</term>
<term>Feuilles de plante (MeSH)</term>
<term>Forêts (MeSH)</term>
<term>Sol (MeSH)</term>
<term>Écosystème (MeSH)</term>
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<term>Chine</term>
<term>Climat désertique</term>
<term>Feuilles de plante</term>
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<term>Sol</term>
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<div type="abstract" xml:lang="en">Soil drying-rewetting is a common phenomenon in arid and semi-arid regions. Under the background of global climate change, it is predicted that the intensity of soil drying-rewetting cycle in Horqin Sandy Land will be further strengthened in the future. In this study, we conducted an in-situ soil column incubation experiment for 180 days to investigate the effects of soil drying-rewetting on leaf litter decomposition and nutrient releases of Populus simonii and Pinus sylvestris var. mongo-lica in Horqin Sandy Land. There were three treatments: Constantly moist treatment (CM, 60% water holding capacity during whole incubation period), mild drying-rewetting treatment (DW
<sub>1</sub>
, gra-dual drought for 10 days plus 60% WHC for 20 days) and heavy drying-rewetting treatment (DW
<sub>2</sub>
, gradual drought for 20 days plus 60% WHC for 10 days). To evaluate their delayed effects, leaf litter in all three treatments were incubated for 60 days under same and constant humid condition (60% WHC) after four cycles of soil drying-rewetting. The responses of litter decomposition to soil drying-rewetting cycles and nutrient releases of P. simonii and P. sylvestris var. mongolica were similar during the drying and rewetting period. Litter mass loss and the release of C, lignin and total phenol were decreased by 17.4%, 23.8%, 35.2% and 32.7% in DW
<sub>2</sub>
treatment compared with CM treatment. There was no significant difference in release of leaf litter N or P among the drying-rewetting treatments. There were consistent changes of litter mass loss and nutrient releases among the treatments at the end of drying-rewetting and delayed incubation period. However, litter decomposition rate and litter C and lignin release rates were increased in DW
<sub>2</sub>
treatment compared with CM treatment during the delayed incubation period, indicating a short-term delayed effect.</div>
</front>
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<ISSN IssnType="Print">1001-9332</ISSN>
<JournalIssue CitedMedium="Print">
<Volume>28</Volume>
<Issue>6</Issue>
<PubDate>
<Year>2017</Year>
<Month>Jun</Month>
<Day>18</Day>
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<ArticleTitle>[Effects of drying-rewetting on leaf litter decomposition and nutrient releases in forest plantations in Horqin Sandy Land, China].</ArticleTitle>
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<Abstract>
<AbstractText>Soil drying-rewetting is a common phenomenon in arid and semi-arid regions. Under the background of global climate change, it is predicted that the intensity of soil drying-rewetting cycle in Horqin Sandy Land will be further strengthened in the future. In this study, we conducted an in-situ soil column incubation experiment for 180 days to investigate the effects of soil drying-rewetting on leaf litter decomposition and nutrient releases of Populus simonii and Pinus sylvestris var. mongo-lica in Horqin Sandy Land. There were three treatments: Constantly moist treatment (CM, 60% water holding capacity during whole incubation period), mild drying-rewetting treatment (DW
<sub>1</sub>
, gra-dual drought for 10 days plus 60% WHC for 20 days) and heavy drying-rewetting treatment (DW
<sub>2</sub>
, gradual drought for 20 days plus 60% WHC for 10 days). To evaluate their delayed effects, leaf litter in all three treatments were incubated for 60 days under same and constant humid condition (60% WHC) after four cycles of soil drying-rewetting. The responses of litter decomposition to soil drying-rewetting cycles and nutrient releases of P. simonii and P. sylvestris var. mongolica were similar during the drying and rewetting period. Litter mass loss and the release of C, lignin and total phenol were decreased by 17.4%, 23.8%, 35.2% and 32.7% in DW
<sub>2</sub>
treatment compared with CM treatment. There was no significant difference in release of leaf litter N or P among the drying-rewetting treatments. There were consistent changes of litter mass loss and nutrient releases among the treatments at the end of drying-rewetting and delayed incubation period. However, litter decomposition rate and litter C and lignin release rates were increased in DW
<sub>2</sub>
treatment compared with CM treatment during the delayed incubation period, indicating a short-term delayed effect.</AbstractText>
</Abstract>
<AuthorList CompleteYN="Y">
<Author ValidYN="Y">
<LastName>Li</LastName>
<ForeName>Jin Tao</ForeName>
<Initials>JT</Initials>
<AffiliationInfo>
<Affiliation>Daqinggou Ecological Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.</Affiliation>
</AffiliationInfo>
<AffiliationInfo>
<Affiliation>University of Chinese Academy of Sciences, Beijing 100049, China.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Sun</LastName>
<ForeName>Xue Kai</ForeName>
<Initials>XK</Initials>
<AffiliationInfo>
<Affiliation>Daqinggou Ecological Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Hu</LastName>
<ForeName>Ya Lin</ForeName>
<Initials>YL</Initials>
<AffiliationInfo>
<Affiliation>Daqinggou Ecological Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.</Affiliation>
</AffiliationInfo>
<AffiliationInfo>
<Affiliation>College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Zhao</LastName>
<ForeName>Shan Yu</ForeName>
<Initials>SY</Initials>
<AffiliationInfo>
<Affiliation>Daqinggou Ecological Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.</Affiliation>
</AffiliationInfo>
<AffiliationInfo>
<Affiliation>University of Chinese Academy of Sciences, Beijing 100049, China.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Zeng</LastName>
<ForeName>De Hui</ForeName>
<Initials>H</Initials>
<AffiliationInfo>
<Affiliation>Daqinggou Ecological Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.</Affiliation>
</AffiliationInfo>
</Author>
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</PublicationTypeList>
<VernacularTitle>干湿交替对科尔沁沙地人工林叶凋落物分解和养分释放的影响.</VernacularTitle>
</Article>
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<Country>China</Country>
<MedlineTA>Ying Yong Sheng Tai Xue Bao</MedlineTA>
<NlmUniqueID>9425159</NlmUniqueID>
<ISSNLinking>1001-9332</ISSNLinking>
</MedlineJournalInfo>
<ChemicalList>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D012987">Soil</NameOfSubstance>
</Chemical>
</ChemicalList>
<CitationSubset>IM</CitationSubset>
<MeshHeadingList>
<MeshHeading>
<DescriptorName UI="D002681" MajorTopicYN="N">China</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D003889" MajorTopicYN="N">Desert Climate</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D017753" MajorTopicYN="N">Ecosystem</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D065928" MajorTopicYN="Y">Forests</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D018515" MajorTopicYN="Y">Plant Leaves</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D012987" MajorTopicYN="N">Soil</DescriptorName>
</MeshHeading>
</MeshHeadingList>
<OtherAbstract Type="Publisher" Language="chi">
<AbstractText>在干旱/半干旱地区,土壤干湿交替现象非常明显.在全球气候变化背景下,预测未来科尔沁沙地的土壤干湿交替变化强度将进一步加剧.本研究采用室内原位土柱培养方法,模拟干湿交替对科尔沁沙地小叶杨和樟子松叶凋落物分解速率及养分释放的影响.试验设置3个处理:恒湿处理(CM)、轻度干湿交替处理(DW
<sub>1</sub>
,10 d干燥+20 d湿润)和重度干湿交替处理(DW
<sub>2</sub>
,20 d干燥+10 d湿润).整个培养试验共处理180 d,其中进行4次干湿交替循环处理,并在干湿交替处理结束后,将各处理置于相同土壤水分条件(60%田间持水量)延时培养60 d.结果表明: 小叶杨和樟子松叶凋落物分解及养分释放对干湿交替的响应一致.在干湿交替期间,DW
<sub>2</sub>
处理显著抑制叶凋落物分解及叶凋落物C、木质素和总酚释放;与CM相比,DW
<sub>2</sub>
处理叶凋落物质量、C、木质素和总酚残留率分别增加17.4%、23.8%、35.2%和32.7%,而干湿交替对叶凋落物N和P养分释放无显著影响.干湿交替处理结束和延时培养结束时,不同干湿处理叶凋落物分解及养分残留率的变化具有一致性.而延时培养期间DW
<sub>2</sub>
处理凋落物分解速率、叶凋落物C和木质素释放加快,表明干湿交替对叶凋落物分解及养分释放具有短期延时效应.</AbstractText>
</OtherAbstract>
<KeywordList Owner="NOTNLM">
<Keyword MajorTopicYN="N">Horqin Sandy Land</Keyword>
<Keyword MajorTopicYN="N">drying-rewetting</Keyword>
<Keyword MajorTopicYN="N">litter decomposition</Keyword>
<Keyword MajorTopicYN="N">nutrient release</Keyword>
<Keyword MajorTopicYN="N">semi-arid region</Keyword>
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<Month>5</Month>
<Day>11</Day>
<Hour>6</Hour>
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<PubMedPubDate PubStatus="medline">
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<list>
<country>
<li>République populaire de Chine</li>
</country>
<region>
<li>Fujian</li>
</region>
<settlement>
<li>Fuzhou</li>
<li>Pékin</li>
</settlement>
</list>
<tree>
<country name="République populaire de Chine">
<noRegion>
<name sortKey="Li, Jin Tao" sort="Li, Jin Tao" uniqKey="Li J" first="Jin Tao" last="Li">Jin Tao Li</name>
</noRegion>
<name sortKey="Hu, Ya Lin" sort="Hu, Ya Lin" uniqKey="Hu Y" first="Ya Lin" last="Hu">Ya Lin Hu</name>
<name sortKey="Hu, Ya Lin" sort="Hu, Ya Lin" uniqKey="Hu Y" first="Ya Lin" last="Hu">Ya Lin Hu</name>
<name sortKey="Li, Jin Tao" sort="Li, Jin Tao" uniqKey="Li J" first="Jin Tao" last="Li">Jin Tao Li</name>
<name sortKey="Sun, Xue Kai" sort="Sun, Xue Kai" uniqKey="Sun X" first="Xue Kai" last="Sun">Xue Kai Sun</name>
<name sortKey="Zeng, De Hui" sort="Zeng, De Hui" uniqKey="Zeng D" first="De Hui" last="Zeng">De Hui Zeng</name>
<name sortKey="Zhao, Shan Yu" sort="Zhao, Shan Yu" uniqKey="Zhao S" first="Shan Yu" last="Zhao">Shan Yu Zhao</name>
<name sortKey="Zhao, Shan Yu" sort="Zhao, Shan Yu" uniqKey="Zhao S" first="Shan Yu" last="Zhao">Shan Yu Zhao</name>
</country>
</tree>
</affiliations>
</record>

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