[Time lag effect between poplar' s sap flow velocity and microclimate factors in agroforestry system in West Liaoning Province].
Identifieur interne : 003037 ( Main/Exploration ); précédent : 003036; suivant : 003038[Time lag effect between poplar' s sap flow velocity and microclimate factors in agroforestry system in West Liaoning Province].
Auteurs : Sun Di [République populaire de Chine] ; De-Xin Guan ; Feng-Hui Yuan ; An-Zhi Wang ; Jia-Bing WuSource :
- Ying yong sheng tai xue bao = The journal of applied ecology [ 1001-9332 ] ; 2010.
Descripteurs français
- KwdFr :
- MESH :
- croissance et développement : Populus.
- métabolisme : Eau.
- méthodes : Agriculture, Science forêt.
- physiologie : Populus, Tiges de plante, Transpiration des plantes.
- Chine, Microclimat.
- Wicri :
- geographic : République populaire de Chine.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Water.
- geographic : China.
- growth & development : Populus.
- methods : Agriculture, Forestry.
- physiology : Plant Stems, Plant Transpiration, Populus.
- Microclimate.
Abstract
By using Granier's thermal dissipation probe, the sap flow velocity of the poplars in agroforestry system in west Liaoning was continuously measured, and the microclimate factors were measured synchronously. Dislocation contrast method was applied to analyze the sap flow velocity and corresponding air temperature, air humidity, net radiation, and vapor pressure deficit to discuss the time lag effect between poplar' s sap flow velocity and microclimate factors on sunny days. It was found that the poplar's sap flow velocity advanced of air temperature, air humidity, and vapor pressure deficit, and lagged behind net radiation. The sap flow velocity in June, July, August, and September was advanced of 70, 30, 50, and 90 min to air temperature, of 80, 30, 40, and 90 min to air humidity, and of 90, 50, 70, and 120 min to vapor pressure deficit, but lagged behind 10, 10, 40, and 40 min to net radiation, respectively. The time lag time of net radiation was shorter than that of air temperature, air humidity, and vapor pressure. The regression analysis showed that in the cases the time lag effect was contained and not, the determination coefficients between comprehensive microclimate factor and poplar's sap flow velocity were 0.903 and 0.855, respectively, indicating that when the time lag effect was contained, the determination coefficient was ascended by 2.04%, and thus, the simulation accuracy of poplar's sap flow velocity was improved.
PubMed: 21360994
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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<author><name sortKey="Di, Sun" sort="Di, Sun" uniqKey="Di S" first="Sun" last="Di">Sun Di</name>
<affiliation wicri:level="1"><nlm:affiliation>Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China. sundiabc@163.com</nlm:affiliation>
<country xml:lang="fr">République populaire de Chine</country>
<wicri:regionArea>Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang</wicri:regionArea>
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<author><name sortKey="Guan, De Xin" sort="Guan, De Xin" uniqKey="Guan D" first="De-Xin" last="Guan">De-Xin Guan</name>
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<author><name sortKey="Yuan, Feng Hui" sort="Yuan, Feng Hui" uniqKey="Yuan F" first="Feng-Hui" last="Yuan">Feng-Hui Yuan</name>
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<author><name sortKey="Wang, An Zhi" sort="Wang, An Zhi" uniqKey="Wang A" first="An-Zhi" last="Wang">An-Zhi Wang</name>
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<author><name sortKey="Wu, Jia Bing" sort="Wu, Jia Bing" uniqKey="Wu J" first="Jia-Bing" last="Wu">Jia-Bing Wu</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Agriculture (methods)</term>
<term>China (MeSH)</term>
<term>Forestry (methods)</term>
<term>Microclimate (MeSH)</term>
<term>Plant Stems (physiology)</term>
<term>Plant Transpiration (physiology)</term>
<term>Populus (growth & development)</term>
<term>Populus (physiology)</term>
<term>Water (metabolism)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr"><term>Agriculture (méthodes)</term>
<term>Chine (MeSH)</term>
<term>Eau (métabolisme)</term>
<term>Microclimat (MeSH)</term>
<term>Populus (croissance et développement)</term>
<term>Populus (physiologie)</term>
<term>Science forêt (méthodes)</term>
<term>Tiges de plante (physiologie)</term>
<term>Transpiration des plantes (physiologie)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Water</term>
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<keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Agriculture</term>
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<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Eau</term>
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<keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Populus</term>
<term>Tiges de plante</term>
<term>Transpiration des plantes</term>
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<keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Plant Stems</term>
<term>Plant Transpiration</term>
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<keywords scheme="MESH" xml:lang="fr"><term>Chine</term>
<term>Microclimat</term>
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<keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>République populaire de Chine</term>
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<front><div type="abstract" xml:lang="en">By using Granier's thermal dissipation probe, the sap flow velocity of the poplars in agroforestry system in west Liaoning was continuously measured, and the microclimate factors were measured synchronously. Dislocation contrast method was applied to analyze the sap flow velocity and corresponding air temperature, air humidity, net radiation, and vapor pressure deficit to discuss the time lag effect between poplar' s sap flow velocity and microclimate factors on sunny days. It was found that the poplar's sap flow velocity advanced of air temperature, air humidity, and vapor pressure deficit, and lagged behind net radiation. The sap flow velocity in June, July, August, and September was advanced of 70, 30, 50, and 90 min to air temperature, of 80, 30, 40, and 90 min to air humidity, and of 90, 50, 70, and 120 min to vapor pressure deficit, but lagged behind 10, 10, 40, and 40 min to net radiation, respectively. The time lag time of net radiation was shorter than that of air temperature, air humidity, and vapor pressure. The regression analysis showed that in the cases the time lag effect was contained and not, the determination coefficients between comprehensive microclimate factor and poplar's sap flow velocity were 0.903 and 0.855, respectively, indicating that when the time lag effect was contained, the determination coefficient was ascended by 2.04%, and thus, the simulation accuracy of poplar's sap flow velocity was improved.</div>
</front>
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<Abstract><AbstractText>By using Granier's thermal dissipation probe, the sap flow velocity of the poplars in agroforestry system in west Liaoning was continuously measured, and the microclimate factors were measured synchronously. Dislocation contrast method was applied to analyze the sap flow velocity and corresponding air temperature, air humidity, net radiation, and vapor pressure deficit to discuss the time lag effect between poplar' s sap flow velocity and microclimate factors on sunny days. It was found that the poplar's sap flow velocity advanced of air temperature, air humidity, and vapor pressure deficit, and lagged behind net radiation. The sap flow velocity in June, July, August, and September was advanced of 70, 30, 50, and 90 min to air temperature, of 80, 30, 40, and 90 min to air humidity, and of 90, 50, 70, and 120 min to vapor pressure deficit, but lagged behind 10, 10, 40, and 40 min to net radiation, respectively. The time lag time of net radiation was shorter than that of air temperature, air humidity, and vapor pressure. The regression analysis showed that in the cases the time lag effect was contained and not, the determination coefficients between comprehensive microclimate factor and poplar's sap flow velocity were 0.903 and 0.855, respectively, indicating that when the time lag effect was contained, the determination coefficient was ascended by 2.04%, and thus, the simulation accuracy of poplar's sap flow velocity was improved.</AbstractText>
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