2007, 20(6): 883-886.
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.