Rainfall Redistribution Characteristics of Dominant Shrubs in Aerial Seeding Afforestation Area in Northeastern Margin of Tengger Desert
Quantitative analysis of the rainfall redistribution process of shrub vegetation in desert ecosystem is of great significance for understanding the eco-hydrological cycle process in arid areas.In this study,the dominant shrubs of Hedysarum scoparium,Calligonum mongolicum and Artemisia ordosica in the northeastern margin of Tengger Desert in 1992 were taken as the research objects.The field in-situ fixed-point observation method was used to analyze the redistribution characteristics of vegetation under different rainfalls,and the effects of plant size and rainfall on the redistribution of vegetation rainfall.The results showed that the average throughfall of the three typical shrubs accounted for the highest proportion,ranging from 68.80％to 78.17％,followed by Hedysarum scoparium,Artemisia ordosica and Calligonum mongolicum.The proportion of canopy interception was between 18.07％and 30.28％,and the highest was Calligonum mongolicum,followed by Artemisia ordosica and Hedysa-rum scoparium.The proportion of stem flow was the smallest,ranging from 0.89％to 3.76％,decreasing from Hedysarum scoparium,Calligonum mongolicum to Artemisia ordosica.With the increase of plant,the stem flow of Hedysarum scoparium increased and the canopy interception decreased.Calligonum mongolicum decreased throughfall.Stem flow and canopy interception increased;the stem flow of Artemisia ordosica decreased and the canopy interception increased.With the increase of rainfall,the stem flow rate of Hedysarum scoparium increased,while that of Calligonum mongolicum and Artemisia ordosica decreased.The canopy interception rate of Hedysar-um scoparium decreased,while that of Calligonum mongolicum and Artemisia ordosica increased.
万方数据
维普
