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首页> 外文会议>International Conference on Energy, Environment and Sustainable Development >Effects of Sand Burial and Water Regimes on Seed Germination and Seedling Emergence of Two Desert Species
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Effects of Sand Burial and Water Regimes on Seed Germination and Seedling Emergence of Two Desert Species

机译：沙埋和水域对两种沙漠物种种子萌发和苗木出现的影响

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摘要

Reaumuria songarica (Pall.) Maxim and Nitraria tangutorum Bobr. are two species growing on nebkhas in dune system. But N. tangutorum distributes more widely than R. songarica does. Sand burial and drought are two major disturbing factors in the field. Experiments were conducted under controlled conditions to investigate sand burial depth and simulated precipitation amount on seed germination, seedling emergence and seedling mass of the two shrubs to explain the dominance of N. tangutorum over R. songarica. Seeds were buried at 6 depths (0, 0.5, 1.5, 3, 5, 8 cm) and irrigated with 3 water regimes (5, 7, 10 mm) in plastic pots (8 cm in diameter and 11 cm in height) under the same light intensity and alternating temperature in an environment controlled growth chamber. R. songarica has a greater germination percentage than N. tangutorum under each burial depth with any water regime. R songarica seed germination increased with burial depth at each water regime and when depth is deeper than 1.5 cm all the seeds germinated under 7 and 10 mm water treatment. N. tangutorum seed germination increased until an optimal burial depth and then decreased. The optimal burial depth shifts with water regime. Seedling emergence of R songarica did not occur at depth deeper than 1.5 cm under any water regime. N. tangutorum seedling emergence maximized at 3, 1.5 and 0.5 cm with 5, 7 and 10 mm water supply regime respectively. Under all the treatments, N. tangutorum seedlings had larger dry mass than R. songarica seedlings. Higher N. tangutorum seedling emergence percentage and seedling mass with given water supply enhance its possibility to appear on nebkhas in the study area.
机译：Reaumuria Songarica（Pall。）Maxim和Nitraria Tangutorum Bobr。在沙丘系统中的Nebkhas是两种生长的两种物种。但是N.唐特um经过罗马卡的方式销售得更广泛。砂砾和干旱是该领域的两个主要令人不安的因素。在受控条件下进行实验，以研究砂埋深和模拟沉淀量对两种灌木的种子萌发，幼苗出苗和幼苗质量，以解释N.Tongorum在R.Songarica的统治。将种子埋在6个深度（0,0.5,1.5,3,5厘米），并用3个水体（5,7,10mm）的塑料盆（直径为8厘米，高度为11厘米）灌溉环境控制的生长室中的相同光强度和交替温度。 R.Songarica在每个埋葬深度下的萌发百分比大于任何水域的校正。 r onongarica种子萌发随着每个水域的埋藏深度而增加，当深度比1.5厘米更深，所有种子都在7和10 mm水处理下发芽。 N.曲矩的种子萌发增加，直到最佳的埋藏深度，然后减少。随着水域的最佳埋葬深度转变。 R Songarica的幼苗出现在任何水域下，r ononarica的育种在1.5厘米处没有发生。 N.宏观幼苗出现在3,1.5和0.5厘米的时间分别最大化，分别为5,7和10 mm供水制度。在所有治疗中，N.曲局幼苗比R.Songarica幼苗更大。具有给定供水的较高的N.宏观幼苗出苗百分比和幼苗肿块提高了在研究区域中出现在Nebkhas上的可能性。

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