水分和沙埋对4种沙生植物种子萌发和出苗的影响

doi:10.7522/j.issn.1000-694X.2013.00135

摘要/Abstract

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。

关键词: 沙生植物, 种子萌发, 幼苗出土, 土壤水分, 沙埋深度

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.

Key words: psammophyte, seed germination, seedling emergence, soil moisture, sand burial depth

中图分类号:

Q945.3

贺宇1, 丁国栋1, 汪晓峰2, 李家国2, 肖萌1. 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.

HE Yu1, DING Guo-dong1, WANG Xiao-feng2, LI Jia-guo2, XIAO Meng1. 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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