揭示环境因素对火烧草(Senecio madagascariensis)发芽的影响及其管理意义

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Virender Singh Hooda, Bhagirath Singh Chauhan
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引用次数: 0

摘要

火棘(Senecio madagascariensis Poir.)已经入侵并定居在澳大利亚东南部沿海地区的许多栖息地,是耕地以及草质差、疏于管理和放牧严重的牧场中的主要杂草。为了研究马达加斯加草(S. madagascariensis)两个种群(Felton 和 Gatton)的种子萌发生态学,我们在实验室和筛选室进行了实验。随着温度从最冷温度(15/5 C)到较高温度(25/15 C)的交替升高,两个种群的发芽率都有所提高。然而,最高温度(35/25 摄氏度)下的发芽率最低。与费尔顿种群相比,加顿种群对盐胁迫和水胁迫的耐受力更强。与交替光照和黑暗期(各 12 小时)(97-98%)相比,在完全黑暗(24 小时)条件下(33-39%),两个种群的发芽率都显著降低。筛房种子埋藏深度实验显示,两个种群的马达加斯加绣线菊出苗率相似。将种子置于土壤表面时,出苗率最高(60%),随后随着埋藏深度的增加,出苗率急剧下降。埋藏深度为 4 厘米的种子没有出苗。在土壤表层添加小麦作物残留物(添加量相当于 4 至 8 兆克公顷-1)后,马达加斯加草(S. madagascariensis)的出苗率显著下降。本研究获得的信息可用于管理和开发有效的杂草管理策略,以控制不同农业生态条件下的马达加斯加蓟马。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Unraveling the influence of environmental factors on fireweed (Senecio madagascariensis) germination and its management implications
Fireweed (Senecio madagascariensis Poir.) has invaded and colonized numerous habitats in the coastal areas of southeastern Australia and is a major weed in cultivated lands as well as in poorly grassed, neglected, and highly grazed pastures. To examine the seed germination ecology of two populations (Felton and Gatton) of S. madagascariensis, experiments were conducted in the laboratory and screenhouse. The germination of both populations increased as the alternating temperatures increased from the coolest temperatures (15/5 C) to warmer temperatures (25/15 C). However, the highest temperature regime (35/25 C) resulted in the lowest germination rates. The Gatton population exhibited greater tolerance to higher temperatures, resulting in significantly higher germination (2.4 times) than the Felton population at the highest alternating temperature of 35/25 C. Compared to the Felton population, the Gatton population demonstrated higher tolerance to salt and water stress. In comparison to alternating light and dark periods (12 h each) (97-98%), the germination of both populations of S. madagascariensis was significantly reduced under complete darkness (24 h) (33-39%). A screenhouse seed burial depth experiment revealed similar emergence of S. madagascariensis seedlings between the populations. The maximum emergence (60%) was observed for seeds placed at the soil surface, followed by a dramatic decline in seedling emergence with an increase in depth. No seedlings emerged from a burial depth of 4 cm. With the addition of wheat crop residue to the soil surface at rates comparable to 4 to 8 Mg ha-1, seedling emergence of S. madagascariensis decreased significantly. Information acquired from this study could be utilized to manage and develop effective weed management strategies for controlling S. madagascariensis in different agroecological conditions.
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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