草业学报 ›› 2021, Vol. 30 ›› Issue (12): 143-151.DOI: 10.11686/cyxb2020451
• 研究论文 • 上一篇
张敏(), NIPAPAN Kanjana, 李铷, 傅杨, 汤东生()
收稿日期:
2020-10-13
修回日期:
2020-12-02
出版日期:
2021-11-11
发布日期:
2021-11-11
通讯作者:
汤东生
作者简介:
Corresponding author. E-mail: tangds@ynau.edu.cn基金资助:
Min ZHANG(), Kanjana NIPAPAN, Ru LI, Yang FU, Dong-sheng TANG()
Received:
2020-10-13
Revised:
2020-12-02
Online:
2021-11-11
Published:
2021-11-11
Contact:
Dong-sheng TANG
摘要:
扁穗雀麦是近年由牧场逃逸至农田的恶性入侵杂草。为了解入侵和生态适应性规律,通过室内试验测定了温度、湿度、深度、pH、盐和渗透势对扁穗雀麦种子萌发的影响。结果表明,30/20 ℃的变温处理下种子萌发率最高,达到92.1%;随着日平均温度的降低种子萌发率逐渐降低;日平均温度接近10 ℃种子几乎不萌发。在pH 5~10的环境条件下,种子萌发率均能达到90%,弱酸和弱碱处理的种子萌发率显著高于中性处理。低于20 mmol·L-1的NaCl处理与对照无显著差异,160 mmol·L-1的处理种子萌发率仍可达到85%以上。-0.1 MPa的渗透势下种子萌发率最高,渗透势高于-0.2 MPa的处理种子萌发率与对照无显著差异,-0.4 MPa处理种子的萌发率仍高于80%。在60%相对湿度的土壤中,种子的萌发率和萌发势均最高。播种于土表的种子萌发势和萌发率均最高,播种深度达到10 cm时,种子几乎不萌发。由此可见,扁穗雀麦种子萌发对环境条件的生态适合度高,因此在多数区域气候温暖干旱的云南具有入侵广阔生境的可能性。
张敏, NIPAPAN Kanjana, 李铷, 傅杨, 汤东生. 环境因子对云南扁穗雀麦种子萌发和出苗的影响[J]. 草业学报, 2021, 30(12): 143-151.
Min ZHANG, Kanjana NIPAPAN, Ru LI, Yang FU, Dong-sheng TANG. Environmental factors affecting seed germination of prairie grass (Bromus willdenowii) in Yunnan Province[J]. Acta Prataculturae Sinica, 2021, 30(12): 143-151.
图1 不同培养温度条件对扁穗雀麦种子萌发的影响不同小写字母表示各处理在0.05水平差异显著。Different letters indicate significant differences among treatments at the 0.05 level.
Fig.1 Effect of incubation temperature conditions on seed germination of B. catharticus
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