摘要
为了研究浑善达克沙地丘间低地植物群落类型及其分布与土壤环境因子的关系,于2004年7~8月对浑善达克沙地丘间低地进行了植物群落学调查,共获取群落样方102个,其中草本植物群落样方99个,灌木样方3个。同时对每一个样方均取了土样,并分析了土壤的全氮、有机质、可溶性钾、钠的含量和土壤溶液的pH值。对在浑善达克沙地中部丘间低地获取的102个植物群落样方进行了分析,按照样方中建群种和优势种的重要值把它们归属于28个植物群落类型,分别以黄花蒿(Artemisiaannua)、褐沙蒿(A.intramongolica)、沙地雀麦(Bromusircutensis)、尖头叶藜(Chenopodiumacuminatum)、大籽蒿(Artemisiasieversiana)、砂珍棘豆(Oxytropisgracilima)、狗尾草(Setariaviridis)、猪毛蒿(Artemisiascoparia)、冷蒿(Artemisiafrigida)、寸草苔(Carexduriuscula)、糙隐子草(Cleistogenessquarrosa)、冰草(Agropyroncristatum)、克氏针茅(Stipakrylovii)、羊草(Leymuschinensis)、赖草(L.secalinus)、无芒雀麦(Bromusiner-mis)、草地风毛菊(Saussureaamara)、菊叶委陵菜(Potentillatanacetifolia)、芨芨草(Achnatherumsplendens)、马蔺(Irislactea)、小红柳(Salixmicrostachya)、芦苇(Phragmitesaustralis)、拂子茅(Calamagrostisepigejos)、鹅绒委陵菜(Potentillaanserine)、金戴戴(Halerpestesruthenica)、星星草(Puccinelliatenuiflora)、水葱(Scirpustabernaemontani)、碱篷(Suaedaglau-ca)为建群种。黄花蒿、沙地雀麦、猪毛蒿、褐沙蒿、尖头叶藜、大籽蒿、砂珍棘豆和狗尾草等群落分布于沙生环境,地下水位低,土壤溶液为中性,全氮和有机质平均含量低;冷蒿、糙隐子草、冰草、克氏针茅、寸草苔、羊草、赖草和菊叶委陵菜等群落分布于固定沙地,土壤的水分、全氮和有机质的含量都较高;无芒雀麦、草地风毛菊、鹅绒委陵菜、星星草和芦苇等群落分布于中生环境,地下水位高,土壤的养分含量也较高;芨芨草、拂子茅、马蔺、
Aims Vegetation and soil surveys were conducted in the summer of 2004 to study the relationship between vegetation types and soil of inter-dune lowland of Otindag sand land. Of 102 vegetation samples collected, 99 were herb-dominated, the others shrub-dominated. We analyzed soils for total nitrogen, soil organic matter, soluble sodium, soluble potassium and pH. Vegetation samples were classified based on species composition and species functional groups. We used detrended canonical correspondence analysis （DCCA） to determine the main environmental factors related to the distribution of plant communities.
Methods The 102 samples were classified into twenty-eight groups dominated by Artemisia annua, A. intramongolica , Bromus iwutensis , Chenopodium acuminatum , A . sieversiana , Oxytropis gracilima , Setaria viridis , A . scoparia , A . frigida , Carex duriuscula , Cleistogenes squarrosa , Agropyron cristatum , Stioa krylovii, Leymus chinensis, L. secalinus, Bromus inermis, Saussurea amara, Potentilla tanacetifolia, Achnatherum splendens, Iris lactea, Salix microstachya, Phragmites australis, Calamagrostis epigejos, Potentilla anserine, Halerpestes ruthenica, Puccinellia tenuiflora, Scirpus tabernaemontani and Suaeda glauca. Importunt findings The Artemisia annua, A. intramongolica, Bromus ircutensis, Chenopodium acuminaturn, A. sieversiana, Oxytropis gracilima, Setaria viridis and A. scoparia associations are mostly distributed on sites often covered by quicksand. The level of the groundwater is low, the lixivium of the soil is neutral and the average soluble K ^＋ , Na ^＋ , total nitrogen and organic matter are low. Artemisia fiigida, Cleistogenes squarrosa, Agropyron cristatum, Stipa krylovii, Potentilla tanacetifolia, Leymus secalinus, Carex duriuscula and L. chinensis associations are rooted mostly in stable sand, where soil water, organic matter and total nitrogen are high. Bromus inern^s＂ , Saussurea amara, Puccinellia tenuiflora, Phragmites australis and Potentilla anserine associations grow in
出处
《植物生态学报》
CAS
CSCD
北大核心
2007年第1期40-49,共10页
Chinese Journal of Plant Ecology
基金
中国科学院知识创新工程重大项目(KSCX1-08)
