植物生态学报 ›› 2019, Vol. 43 ›› Issue (10): 899-908.DOI: 10.17521/cjpe.2019.0154
收稿日期:
2019-06-24
接受日期:
2019-09-05
出版日期:
2019-10-20
发布日期:
2020-02-24
通讯作者:
何维明
基金资助:
Received:
2019-06-24
Accepted:
2019-09-05
Online:
2019-10-20
Published:
2020-02-24
Contact:
HE Wei-Ming
Supported by:
摘要:
种子出苗对种间关系和群落组成具有重要影响。种内研究表明种子质量与种子出苗之间存在正相关关系, 但这种关系很少在物种水平进行检验, 尤其是在不同土壤埋藏深度条件下。为此, 该文开展了一个因子实验(10种植物和5种土埋深度(0、1、2、4和8 cm))以检验是否在不同土层中“种子质量-种子出苗之间的正相关关系”始终存在。该文在不同土埋深度播种50粒种子(重复5次), 连续30天观测种子出苗, 并提出了一个耐土埋性指标。结果表明: (1) 10种植物的最适出苗深度为0-2 cm土层; 6种植物的最大出苗率发生在1 cm土埋深度。(2)种子质量与耐土埋性之间存在显著的正相关关系, 种子质量越大耐土埋性越强, 适宜出苗的土层越深。(3)当土层较深(4或8 cm)时, 种子出苗率和持续出苗时间随种子质量增加而增大, 种子出苗率与持续出苗时间之间存在正相关关系; 这些关系在较浅土层(0、1或2 cm)并不存在。这些结果有助于进一步理解种子大小与出苗之间的关系, 以及种子出苗过程中的策略。
王祖幸, 何维明. 土埋深度影响物种水平的种子质量-种子出苗关系. 植物生态学报, 2019, 43(10): 899-908. DOI: 10.17521/cjpe.2019.0154
WANG Zu-Xing, HE Wei-Ming. Effects of soil-burial depths on the relationship between seed mass and seed emergence. Chinese Journal of Plant Ecology, 2019, 43(10): 899-908. DOI: 10.17521/cjpe.2019.0154
物种 Species | 科 Family | 生长型 Growth form | 生活型 Life form |
---|---|---|---|
羽茅 Achnatherum sibiricum | 禾本科 Gramineae | 禾草 Grass | 多年生 Perennial |
长芒草 Stipa bungeana | 禾本科 Gramineae | 禾草 Grass | 多年生 Perennial |
Vulpia octoflora | 禾本科 Gramineae | 禾草 Grass | 一年生 Annual |
草地早熟禾 Poa pratensis | 禾本科 Gramineae | 禾草 Grass | 一年生 Annual |
Poa secunda | 禾本科 Gramineae | 禾草 Grass | 多年生 Perennial |
野苜蓿 Medicago falcata | 豆科 Leguminosae | 非禾草 Forb | 多年生 Perennial |
灰绿藜 Chenopodium glaucum | 藜科 Chenopodiaceae | 非禾草 Forb | 一年生 Annual |
千叶蓍 Achillea millefolium | 菊科 Compositae | 非禾草 Forb | 多年生 Perennial |
加拿大一枝黄花 Solidago canadensis | 菊科 Compositae | 非禾草 Forb | 多年生 Perennial |
Centaurea maculosa | 菊科 Compositae | 非禾草 Forb | 二年生 Biennial |
表1 本实验选择的10种不同植物
Table 1 A list of the ten plant species selected for this experiment
物种 Species | 科 Family | 生长型 Growth form | 生活型 Life form |
---|---|---|---|
羽茅 Achnatherum sibiricum | 禾本科 Gramineae | 禾草 Grass | 多年生 Perennial |
长芒草 Stipa bungeana | 禾本科 Gramineae | 禾草 Grass | 多年生 Perennial |
Vulpia octoflora | 禾本科 Gramineae | 禾草 Grass | 一年生 Annual |
草地早熟禾 Poa pratensis | 禾本科 Gramineae | 禾草 Grass | 一年生 Annual |
Poa secunda | 禾本科 Gramineae | 禾草 Grass | 多年生 Perennial |
野苜蓿 Medicago falcata | 豆科 Leguminosae | 非禾草 Forb | 多年生 Perennial |
灰绿藜 Chenopodium glaucum | 藜科 Chenopodiaceae | 非禾草 Forb | 一年生 Annual |
千叶蓍 Achillea millefolium | 菊科 Compositae | 非禾草 Forb | 多年生 Perennial |
加拿大一枝黄花 Solidago canadensis | 菊科 Compositae | 非禾草 Forb | 多年生 Perennial |
Centaurea maculosa | 菊科 Compositae | 非禾草 Forb | 二年生 Biennial |
图1 10种植物的单粒种子质量(平均值±标准误差)。不同小写字母表示种子质量在种间差异显著(p < 0.05)。Am, 千叶蓍; As,羽茅; Cg, 灰绿藜; Cm, Centaurea maculosa; Mf, 野苜蓿; Pp, 草地早熟禾; Ps, Poa secunda; Sb, 长芒草; Sc, 加拿大一枝黄花; Vo, Vulpia octoflora。
Fig. 1 The mass per seed of the ten species used in the experiment (mean ± SE). Different lowercase letters indicate significant differences in mass per seed among species (p < 0.05). Am, Achillea millefolium; As, Achnatherum sibiricum; Cg, Chenopodium glaucum; Cm, Centaurea maculosa; Mf, Medicago falcata; Pp, Poa pratensis; Ps, Poa secunda; Sb, Stipa bungeana; Sc, Solidago canadensis; Vo, Vulpia octoflora.
图2 10种植物的种子出苗率随5种不同土埋深度和时间的变化(平均值±标准误差)。
Fig. 2 Changes in the seed emergence of 10 different plant species with five different soil burial depths and time (mean ± SE).
图3 种子质量与耐土埋性的关系。图中的10个点分别代表10种不同植物(平均值±标准误差)。r表示数据间的相关性, p值表示概率。
Fig. 3 Relationship between seed mass and the tolerance to soil burial. Each point represents 10 species (mean ± SE). r represents the correlation coefficient between two variables, and the p represents probability.
图4 不同土埋深度下种子质量与出苗率、T50间的关系。每个小图中的10个点分别代表10种不同植物(平均值±标准误差)。
Fig. 4 Illustrations of seed mass vs. seed emergence and seed mass vs. T50 at five different soil burial depths. The ten data points per panel represent the different plant species (mean ± SE).
图5 不同土埋深度下种子出苗率与T50之间的关系。每个小图中的10个点分别代表10种不同植物(平均值±标准误差)。
Fig. 5 Relationships between seed emergence and T50 at five different soil burial depths. Each point per panel represents one tested plant species (mean ± SE).
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