宁夏盐池平沙地主要植物群落土壤水分季节动态  

Plant Communities and Seasonal Change of Soil Water Content on Flat Sandy Land in Yanchi,Ningxia Hui Autonomous Region

作　　者：弓成[1] 温存[1] 

机构地区：[1]北京林业大学水土保持学院教育部水土保持与荒漠化重点实验室,北京100083

出　　处：《水土保持通报》2008年第3期39-43,共5页Bulletin of Soil and Water Conservation

基　　金："十一五"国家科技支撑项目(2006BAD26B0702)

摘　　要：采用样方法,调查了盐池沙地主要植物群落,并测定了4—10月各主要植物群落样地的土壤含水量,研究了不同植物群落土壤含水量的季节动态。结果表明,在根层以下为不透水层的平沙地,各样地平均土壤含水量由小到大依次为:赖草(Leymus secalinus)群落(4.91%)<猫头刺(Oxytropis aciphylla)群落(7.42%)<柠条(Caragana korshinskii)群落(10.36%)<黑沙蒿(Artemisia ordosica)群落(12.55%)<裸地(16.27%);同一植物群落(包括裸地)的土壤含水量在各个季节也不相同。在进行沙地植被建设时,适宜采用柠条和黑沙蒿,并注意控制其合理密度及配置比例,以期达到长期稳定的治理效果。Investigation was carried out on the main plant communities in Yanchi sandy landby sampling method and soil water content was measured on each sample plot, as well as the seasonal change of soil water content in the different plant communities. Results show that plant communities on the flat sandy land with impermeable stratum below root layer, in terms of average soil water content in different plots, ranke in the ascendant order of Leymus secalinus community （4. 91%）, Oxytropis aciphylla community （7. 42%）, Caragana korshinskii Community （10. 36%）, Artemisia ordosica Community （12. 55%）, and bare sandy land （16.27%）. In the same plant community, soil water content is different in different seasons. During vegetation construction on sandy land, we should select Caragana korshinskii and Artemisia ordosica as the main artificial vegetation species and control the density of plant in a reasonable range or distribute some proportion of bare sandy land to achieve a long-term stable state.

关 键 词：盐池沙地 植物群落 土壤含水量 

分 类 号：Q948[生物学—植物学] S152.7[农业科学—土壤学]