Stock Sap Flow Characters of Juglans reg ia and Relationship withM eteorological Factors in Dry Season
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1.
Forestry College, H ebeiAgricu lturalUn ivers ity, Baod ing?? 071000, Hebe,i Ch ina
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2.
Key Laboratory for S ilvicu lture and Conservation ofM in is try ofEducat ion, Beijing Fores try Un iversity, Beijing?? 100083, Ch ina
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Received Date:
2006-11-10
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Abstract
Juglans reg ia is an important econom ic tree species. Observation of its stock sap flow w as carried bySF100 heat pulse recorder in dry season( April-July) in area of conversion farm land for forest and surround ing meteorolog ical facto rs such as air temperature, a ir relative hum idity and radiation intensity w ere monitored in-phase. Experimental p lot locates in P ing shan, H ebe.i Th is study w ould o ffer some references for vegetation restoration. Theresu lts show ed that the Jug lans reg ia stock sap flow changed obv iously betw een day and n igh,t w hich follow ed a single peak type curve. Variation amplitude w as b ig in sunny day and little in cloudy day; In Apr il-M ay, sap flow w asbig and little in June-Ju ly because of so ilw ater stress; In fluencing order on stock sap flow flux byme teoro log ica l facto rs w as sun rad iation> a ir temperature> re lative hum id ity respectively.
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Proportional views
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