[1]ZHAO Yan,ZHOU Wen-yuan,SUN Bao-ping,et al.Root Distribution of Three Desert Shrubs and Soil Moisture in Mu Us Sand Land[J].Research of Soil and Water Conservation,2010,17(04):129-133.
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Root Distribution of Three Desert Shrubs and Soil Moisture in Mu Us Sand Land
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
17
Number of periods:
2010 04
Page number:
129-133
Column:
Public date:
2010-08-20
- Title:
- Root Distribution of Three Desert Shrubs and Soil Moisture in Mu Us Sand Land
- Keywords:
- root distribution; soil water content; Artemisiaordo-sica; Hedysarum mongolicum; Atraphaxis bracteata A· Los·
- CLC:
- S152.7;S718.3
- DOI:
- -
- Abstract:
- Root distribution of three desert shrubs,Artemisiaordo-sica,Hedysarum mongolicum and Atraphaxis bracteata A· Los· were investigated in wind sandy land conditions using whole root system excavation method.The rhizosphere soil moisture contents in different layers were observed to determine the root distribution of three desert shrubs and their jnteractive of soil moisture.The results showed that roots of Hedysarum mongolicum distribution for underground 0-280cm,mainly distributed in the 20-110 cm,and their root weight is 65.86% of the total amounts.The roots of Atraphaxis bracteata A· Los· distribution for underground 0-180cm,mainly distributed in the 0-80cm,and their weight is 68.29% of the total amounts.The roots of Artemisiaordo-sica distribution for underground 0-180 cm,mainly distributed in the 0-60cm,and their weight is 62.14% of the total amounts.For vertical distribution of plant root systems of three different morphological characteristics,the distribution of Atraphaxis bracteata A· Los· is the "V"-type,and the distribution of Artemisiaordo-sica is "umbrella" type.In contrast,the distribution of Atraphaxis bracteata A· Los· is more uniformly.Except for Hedysarum mongolicum,Artemisiaordo-sica and Atraphaxis bracteata A· Los· have more root distributing in toplayer (0-20cm).There are largest distribution share in 0-80cm layer of root density,and decreasing trend from the soil surface to the deep layers.The absorptive roots of plant have markedly effect on soil moisture.Soil moisture rapidly decreased under the concentrated distribution area of absorptive roots.The largest soil water content is Artemisiaordo-sica,the next is Atraphaxis bracteata A· Los· and Hedysarum mongolicum.The plant responses is closely related to their root distribution and plant water-use strategy.The discrepancy of root distribution partially determined the position of the studied species in water resources competition.
- References:
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1900-01-01