| 鲁 敏,吴振廷,闫 婷,尚海军,师鹏飞,王美珍,乌日恒.覆土厚度及土壤水分对五角枫种子萌发及幼苗生长的影响[J].林业调查规划,2024,49(5):18-23 |
| 覆土厚度及土壤水分对五角枫种子萌发及幼苗生长的影响 |
| Effect of Covering Soil Thickness and Soil Water Content onSeed Emergency and Seedling Growth of Acer mono |
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| DOI： |
| 中文关键词: 五角枫 覆土厚度 土壤相对含水量 种子萌发 幼苗生长 |
| 英文关键词: Acer mono covering soil thickness soil relative water content seed emergence seedling growth |
| 基金项目:内蒙古自治区重点研发和成果转化计划项目(2022YFDZ0054);内蒙古自治区林业科学研究院科研能力提升“揭榜挂帅”项目(2024NLTS02). |
| 作者 | 单位 | | 鲁 敏 | 内蒙古自治区林业科学研究院,内蒙古 呼和浩特 010010
沙地生物资源保护与培育国家林业局重点实验室,内蒙古 呼和浩特 010010 | | 吴振廷 | 内蒙古自治区林业科学研究院,内蒙古 呼和浩特 010010
沙地生物资源保护与培育国家林业局重点实验室,内蒙古 呼和浩特 010010 | | 闫 婷 | 内蒙古自治区林业科学研究院,内蒙古 呼和浩特 010010
沙地生物资源保护与培育国家林业局重点实验室,内蒙古 呼和浩特 010010 | | 尚海军 | 内蒙古自治区林业科学研究院,内蒙古 呼和浩特 010010
| | 师鹏飞 | 内蒙古自治区林业科学研究院,内蒙古 呼和浩特 010010
| | 王美珍 | 内蒙古自治区林业科学研究院,内蒙古 呼和浩特 010010
内蒙古自治区黑果枸杞工程技术研究中心,内蒙古 呼和浩特 010010 | | 乌日恒 | 内蒙古自治区林业科学研究院,内蒙古 呼和浩特 010010
内蒙古自治区黑果枸杞工程技术研究中心,内蒙古 呼和浩特 010010 |
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| 中文摘要: |
| 种子覆土厚度及土壤水分供应量是影响其萌发和幼苗建成的关键生境因子。通过室内控制实验,研究了不同覆土厚度(0、1、2、4、6、8、10 cm) 及土壤相对含水量(4%、8%、12%、16%、20%、30%和40%)对五角枫种子萌发特征、幼苗早期生长及生物量分配特性的影响。结果表明,五角枫种子出苗率随覆土厚度增加呈先增后降趋势。当覆土厚度为1~2 cm 时,出苗率显著高于其他处理(P<0.05);覆土厚度≥4 cm 时抑制出苗;覆土10 cm时种子无法出苗。覆土厚度增加对幼苗高生长表现出明显抑制,幼苗总茎长、主根长以及鲜重随覆土厚度增加呈下降趋势,幼苗根茎比及地径则呈先降后增趋势。随土壤相对含水量升高,五角枫种子出苗率呈先增加后降低趋势。当土壤相对含水量为4%时,种子能够萌发出苗,但出苗率低(59.26%);当土壤相对含水量由8%提高30%,种子出苗率由67.78%提高为85.19%,且出苗较整齐,其中土壤相对含水量为30%时种子出苗率显著高于其他处理;当土壤相对含水量提高到40%时,过高的土壤水分又导致出苗率下降。水分条件对五角枫幼苗早期生长具有显著影响,随土壤相对含水量的升高,幼苗株高、主根长、基径、幼苗鲜重均表现出显著增加趋势。综上所述,对五角枫种子覆土1~2 cm 并保持土壤相对含水量30%,其种子出苗率高且出苗整齐,幼苗生长健壮。 |
| 英文摘要: |
| Seed covering soil thickness and soil water availability are key habitat factors affecting germination
and seedling establishment. This paper investigated the response of different thickness covering soil (0, 1, 2,4, 6, 8 and 10cm) and soil moisture (4%, 8%, 12%, 16%, 20%, 30% and 40%) on seed germination characteristics,
early seedling growth and biomass allocation of Acer mono through controlled indoor experiments,
in order to provide theoretical references for the seedling cultivation. The results showed that seedlings emergence
rate of A. mono increased first and then decreased with the increase of covering soil thickness. When the
thickness covering soil was 1-2 cm, the seeding emergence percentage was significantly higher than other
treatments (P<0.05); seedling emergence was inhibited when thickness of covering soil was ≥4 cm, and
seedlings did not occurred at the covering soil thickness of 10 cm. With the increase of covering soil thickness,
seedling height growth was significantly inhibited, and seedling total stem length, main root length and fresh weight tended to decrease with increasing soil thickness, while seedling root/ shoot ratio and ground diameter tended to decreases and then increase. The seedling emergence rate increased and then decreased with the increase of soil relative water content. When the relative soil water content was 4%, the seeds could germinate
but the seedling emergence rate was low (59.26%). When the soil relative water content was increased
from 8% to 30%, the seedling emergence rate increased significantly from 67.78% to 85.19%, and the seedlings
emerged neatly, in which the seedling emergence rate was significantly higher than other treatments when
the soil relative water content was 30%. When the soil relative water content increased to 40%, the excessive
soil moisture led to a decrease in seedling emergence. The total stem length, main root length, basal
ground diameter and fresh weight of seedlings all showed a significant increase with the increase of soil relative
water content. In conclusion, the seeds of A. mono were covered 1-2 cm soil and maintained at 30%
relative soil water content, which resulted in a high seedling emergence rate and healthy seedling growth. |
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