摘要
羊草草地植物群落的分布与土壤水盐运动有着十分密切的关系。研究结果表明，羊草、拂子茅、獐毛和角碱篷群落的土壤饱和导水率分别为０．０５８６ｃｍ·ｈ￣（－１），０．０５６７ｃｍ·ｈ￣（－１），０．０１７５ｃｍ·ｈ￣（－１）和０．０００４ｃｍ．ｈ￣（－１）。当土壤含水量相同时，角碱蓬群落下土壤水吸力高于羊草群落。在相同的土壤水吸力范围内，角碱蓬群落下土壤非饱和导水率高于羊草群落。因此，角碱篷群落在春季干旱时，士体内上行水流的数量和强度远远大于羊草群落。夏季降水集中时，角碱蓬群落下土体内下行水流又远远小于羊草群落。造成土体上部甚至表层的盐分积累。
The movements of water and Total Dissolved Salts(TDS) in soils were cl-oselv related to the plant community in Aneurolcpidiunl chinense grassland of Songnen Plain.The results of our study showed: that the water conductivity(WC)in the saturated soils under different communities was 0. 0586cm·h￣(-1) (Aneurolepidium chinense),0.0567cm·h￣(-1)(Calamagrostis epigeios),0.0175cm·h￣(-1)(Aeluropus littoralis var.sinensis)and0. 0004cm·h￣(-1)(Suaeda corniculata);that the soil matric suction(SMS)was greatly higher under Suaeda corniculata than under Aneurolepidium chinense when the soil moisture was similar; that the amount and velocity of upward moving water in the soil were smaller under Aneurolepidium chinense 00 than undcr Suacda corniculata,but those of downward moving water were larger under the former.therefore,it bro-ught about the accumulation of dissolved salts in the uplayer of the soil under Suaeda corniculata, but under Aneurolepidium chinense the amount of dissolved salts decreased quickly with the precipitation in the summer.
出处
《植物生态学报》
CAS
CSCD
北大核心
1994年第2期132-139,共8页
Chinese Journal of Plant Ecology
基金
自然科学基金
关键词
松嫩平原
羊草
草地
水盐运动
Aneurolepidium chinense grassland
Songnen plain
Water and dissolved salts in soils
