准噶尔盆地南缘梭梭树干液流规律比较

Abstract

Abstract: The trunk sap flow and soil moisture content of artificiallyplanted and natural Holoxylon ammodendron growing in the southern marginal zone of the Junggar Basin, Xinjiang, China were measured with the SF-300 heatpulse technique, and the data were analyzed and compared. An optimum regression equation between trunk sap flow velocity of artificially-planted Holoxylon ammodendron and meteorological factors was developed. The results show that the curve of daily cumulative trunk sap flow flux of artificially-planted Holoxylon ammodendron was S-shaped, and the correlation between daily cumulative trunk sap flow flux and soil moisture content was very remarkable; the curves of daily change of trunk sap flow velocity were mostly bimodal, the change of circadian rhythm was obvious, and the time lag to air temperature was for about one hour; water consumption of natural Holoxylon ammodendron was relatively stable, the curve of daily cumulative trunk sap flow flux of natural Holoxylon ammodendron was approximatively beelineshaped, there was no correlation with soil moisture content, and the curves of daily change of trunk sap flow velocity were mostly in a multipeak shape without obvious daily process. The average value of trunk sap flow flux of artificially-planted Holoxylon ammodendron was 0.240 L/(cm².d) during the observation period, it was 1.5 times of that of natural Holoxylon ammodendron After rainfall, the peak value of sap flow velocity of artificiallyplanted and natural Holoxylon ammodendron was moved up for 3 hours and 30 minutes respectively compared with that before rainfall.

Key words: Holoxylon ammodendron, trunk sap flow velocity, meteorological factor, soil moisture content, Junggar Basin

LI Miao-ling,ZHOU Hong-fei,SUN Peng-fei. Comparative Study on the Stem-sap Flow Flux of Holoxylon ammodendronin Southern Marginal Zone of the Junggar Basin[J]., 2012, 29(1): 101-108.

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Comparative Study on the Stem-sap Flow Flux of Holoxylon ammodendronin Southern Marginal Zone of the Junggar Basin

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