| 水分和沙埋对4种沙生植物种子萌发和出苗的影响 |
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| 引用本文： | 贺 宇,丁国栋,汪晓峰,李家国,肖 萌.水分和沙埋对4种沙生植物种子萌发和出苗的影响[J].中国沙漠,2013,33(6):1711-1716. |
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| 作者姓名： | 贺 宇 丁国栋 汪晓峰 李家国 肖 萌 |
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| 作者单位： | 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 |
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| 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（Bassia dasyphylla）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（Artemisia ordosica）、灌木沙冬青（Ammopiptanthus mongolicus）和沙棘（Hippophae rhamnoides）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0.5 cm,沙冬青和沙棘适宜沙埋深度1.0 cm。
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| 关 键 词： | 沙生植物 种子萌发 幼苗出土 土壤水分 沙埋深度 |
| 收稿时间： | 2012-11-12 |
| 修稿时间： | 2012-01-09 |
Effects of Water Supply and Sand Burial on Seed Germination and Seedling Emergence of Four Psammophytes |
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| HE Yu,DING Guo-dong,WANG Xiao-feng,LI Jia-guo,XIAO Meng.Effects of Water Supply and Sand Burial on Seed Germination and Seedling Emergence of Four Psammophytes[J].Journal of Desert Research,2013,33(6):1711-1716. |
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| Authors: | HE Yu DING Guo-dong WANG Xiao-feng LI Jia-guo XIAO Meng |
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| Institution: | 1.School of Soil and Water Conservation/Ministry of Education, Key Laboratory of Soil and Water Conservation and Combating Desertification, Beijing Forestry University, Beijing 100083, China;
2.School of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China |
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| Abstract: | 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 increased with increasing soil moisture. The most suitable water content for the seed of Artemisia 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 significant effect on seed germination and seedling emergence. The seed germination rate of Bassia dasyphylla reached the highest with no burial. The most suitable sand burial depth for Artemisia ordosica, Ammopiptanthus mongolicus and Hippophae rhamnoides were 0.5 cm,1.0 cm and 1.0 cm respectively. |
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| Keywords: | psammophyte seed germination seedling emergence soil moisture sand burial depth |
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