干旱区研究

Arid Zone Research ›› 2019, Vol. 36 ›› Issue (5): 1175-1185.doi: 10.13866/j.azr.2019.05.15

• Plant and Plant Resources • Previous Articles     Next Articles

Effects of Soil Types and Precipitation Variation on Dynamic Status of Artemisia scoparia Population

SU Ying1,2, LI Yue-fei1,2, CHEN Lin1,2, ZHU Zhong-you1,2, YUAN Chuang1,2,3, MENG Wen-ting1,2, ZHU Lin1,2   

  1. 1. Key Laboratory for Restoration and Reconstruction of Degenerated Ecosystem in Northwest China under Ministry of Education, Ningxia University,Yinchuan 750021,Ningxia,China;
    2. Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China,Ningxia University, Yinchuan 750021,Ningxia,China;
    3. College of Agriculture,Ningxia University,Yinchuan 750021,Ningxia,China
  • Received:2018-11-01 Revised:2019-01-28 Published:2025-10-14

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Abstract: Artemisia scoparia,a herbaceous plant species in the desert steppe in Yanchi County,Ningxia,was taken as the research object.Three soil types including sandy soil,weathered bedrock residual soil and sierozem soil were selected,a field device was used to change the rainfall pattern,and the samples were collected from the delimited sample plots to analyze the effects of these factors on the dynamic status of A.scoparia population.The results showed that the bulk moisture content of weathered bedrock residual soil was higher than that of sandy soil and sierozem soil.In the rainfall-increased zone,the bulk moisture contents of sandy soil,weathered bedrock residual soil and sierozem soil were increased by 10.6%,6.6% and 20.2% respectively,but they were decreased by 44.1%,9.2% and 20.1% respectively in the rainfall-decreased area.The survival curve of A.scoparia was concave,and the plant species was a typical r-strategist.Comparatively,the canopy of A.scoparia growing on sandy soil was larger,but the density of the plants growing on sierozem soil was larger.At the middle growth stage of A.scoparia,the plant height and canopy on sandy soil in the rainfall-increased zone were higher,but the plant density in the rainfall-reduced area was higher.On weathered bedrock residual soil,the plant density in the rainfall-decreased was high,but the plant height and canopy were higher.On sierozem soil,the plant density in the rainfall-decreased zone was the lowest,but the plant height and canopy were higher.At the early growth stage,the soil type,soil moisture,plant height and canopy were negatively correlated.At the middle growth stage,there were the significant negative correlations between soil moisture and plant density,between soil type and plant height,and between soil type and canopy.At the later growth stage,the soil moisture content was extremely negatively correlated with plant density,and the soil type was extremely negatively correlated with canopy.The biomass of A.scoparia was positively correlated with total carbon content and total nitrogen content (P<0.05),and negatively correlated with total phosphorus content (P<0.05).

Key words: Artemisia scoparia, soil type, precipitation variation, survival curve, population dynamic, desert steppe, Yanchi County, Ningxia