水分和沙埋对4种沙生植物种子萌发和出苗的影响  

Effects of Water Supply and Sand Burial on Seed Germination and Seedling Emergence of Four Psammophytes

作　　者：贺宇[1] 丁国栋[1] 汪晓峰[2] 李家国[2] 肖萌[1] 

机构地区：[1]北京林业大学水土保持学院/水土保持与荒漠化防治教育部重点实验室,北京100083 [2]北京林业大学生物科学与技术学院,北京100083

出　　处：《中国沙漠》2013年第6期1711-1716,共6页Journal of Desert Research

基　　金：国家林业公益性行业科研专项项目(201104024)资助

摘　　要：通过室内试验研究了土壤水分和沙埋深度对4种沙生植物种子萌发和出苗的影响。结果表明：草本雾冰藜（Bassiadasyphylla）种子萌发和幼苗出土喜好水分，水分含量越高，种子发芽率越高；半灌木黑沙蒿（ArtemisiaOF—dosica）、灌木沙冬青（AmmopiptanthUSmongolicus）和沙棘（Hippophaerhamnoides）种子在含水量为15％～20％的土壤中发芽率高，干旱或水分含量过高会导致种子发芽率降低。沙埋深度显著影响种子的萌发和出苗，雾冰藜种子在无沙埋时发芽率最高，黑沙蒿适宜沙埋深度为0．5Cm，沙冬青和沙棘适宜沙埋深度1．0Cm。The effects of water supply and sand burial on seed germination and seedling emergence of four psammophytes were experimented. The results showed that Bassia dasyphylla preferred water in the process of seed germination and seedling emergence. The seed germination rate of Bassia dasyphylla in creased with increasing soil moisture. The most suitable water content for the seed of Arternisia ordosica, Ammopiptanthus mongolicus and Hippophae rhamnoides to germinate was 15 % -20 %. Seed germination rate reduced when encountered with drought or over moist enviroments. Sand burial depth had signifi cant effect on seed germination and seedling emergence. The seed germination rate of Bessie dasgphylla reached the highest with no burial. The most suitable sand burial depth for Artemisia ordosica, Ammopp-tanthus mongoltcus and Hippophae rhamnoides were O. 5 cm, 1.0 cm and 1.0 cm respectively.

关 键 词：沙生植物 种子萌发 幼苗出土 土壤水分 沙埋深度 

分 类 号：Q945.3[生物学—植物学]