knapweed

简明释义

英[/ˈnæp.wiːd/]美[/ˈnæp.wiːd/]

n. 黑矢车菊

英英释义

单词用法

同义词

反义词

例句

1.Oh Germany there is love - the knapweed in this "field" have the flowers pale blue and purple, blue, and purple, and fruit, pink, rosy, white in various colors.

哦德国那边有我喜爱的矢车菊- - -这种“原野上的小花”已经有浅蓝、蓝紫、深蓝、深紫、雪青、淡红、玫瑰红、白等多种颜色。

2.I prefer the Daisy and the knapweed in particular.

我特别喜欢雏菊和矢车菊。

3.Main compositions: Lavender extract, Knapweed, Sage, Coral powder.

主要成份：熏衣草精华、矢车菊、鼠尾草、珊瑚粉末。

4.Oh Germany there is love - the knapweed in this "field" have the flowers pale blue and purple, blue, and purple, and fruit, pink, rosy, white in various colors.

哦德国那边有我喜爱的矢车菊- - -这种“原野上的小花”已经有浅蓝、蓝紫、深蓝、深紫、雪青、淡红、玫瑰红、白等多种颜色。

5.The local conservation group organized a volunteer day to remove knapweed 刺苜蓿 from the nature reserve.

当地的保护组织组织了一次志愿者日，以清除自然保护区中的刺苜蓿 knapweed。

6.Farmers often struggle to control knapweed 刺苜蓿 in their fields, as it can spread rapidly.

农民们常常难以控制田地里的刺苜蓿 knapweed，因为它可以迅速传播。

7.The garden was overrun with knapweed 刺苜蓿, making it difficult for other plants to thrive.

花园里被刺苜蓿 knapweed 侵占，导致其他植物难以生长。

8.During the hike, we noticed patches of knapweed 刺苜蓿 along the trail.

在徒步旅行中，我们注意到小径旁有几片刺苜蓿 knapweed。

9.The invasive knapweed 刺苜蓿 species can outcompete native flora for resources.

这种入侵性的刺苜蓿 knapweed 物种可以在资源竞争中击败本土植物。

作文

In the vast world of botany, there are countless plants that play significant roles in their ecosystems. One such plant is the knapweed, known scientifically as Centaurea. This genus includes several species, but the most notorious among them is the spotted knapweed (Centaurea maculosa). Native to Europe and Asia, this invasive weed has spread across North America, causing considerable ecological disruption. Understanding the impact of knapweed is essential for both conservation efforts and agricultural practices.The knapweed is characterized by its striking purple flowers and spiky leaves, making it visually distinctive. However, its beauty is deceiving. Once introduced to new environments, knapweed can outcompete native flora for resources such as sunlight, water, and nutrients. This aggressive growth habit allows it to dominate landscapes, leading to a decline in biodiversity. In many regions, the presence of knapweed has been linked to the reduction of native plant populations, which in turn affects the animals that rely on these plants for food and habitat.Moreover, the spread of knapweed poses significant challenges for farmers. This weed can invade pastures and cropland, reducing the quality of forage for livestock and decreasing crop yields. The economic implications are substantial, as farmers often spend large amounts of money on herbicides and other control measures to manage knapweed infestations. Additionally, the chemical treatments used can have adverse effects on the surrounding ecosystem, further complicating the issue.Efforts to control knapweed have included mechanical removal, chemical treatments, and biological control methods. Biological control involves introducing natural predators or competitors to help manage the spread of knapweed. For instance, certain insects that feed specifically on knapweed have been introduced in some areas with the hope of curbing its growth. While these methods can be effective, they require careful planning and monitoring to ensure that they do not inadvertently harm native species.Education and awareness are crucial in the fight against knapweed. By informing the public about the dangers of this invasive species, we can encourage responsible gardening and landscaping practices. For instance, gardeners should be cautious when purchasing plants, ensuring that they do not inadvertently introduce knapweed or other invasive species into their yards. Community efforts, such as organized weed pulls and educational workshops, can also play a vital role in managing knapweed populations.In conclusion, while the knapweed may be a beautiful plant, its impact on ecosystems and agriculture cannot be overlooked. As we continue to grapple with the challenges posed by invasive species, understanding the biology and behavior of knapweed will be essential. Through concerted efforts in management, education, and prevention, we can work towards preserving our native ecosystems and ensuring that the balance of nature remains intact.

在广阔的植物学世界中，有无数植物在其生态系统中发挥着重要作用。其中一种植物是knapweed，科学上称为Centaurea。这个属包括几种物种，但其中最臭名昭著的是斑点knapweed（Centaurea maculosa）。这种植物原产于欧洲和亚洲，已传播到北美，造成了相当大的生态破坏。理解knapweed的影响对于保护工作和农业实践至关重要。knapweed的特点是其令人瞩目的紫色花朵和尖刺状叶子，使其在视觉上十分独特。然而，它的美丽具有欺骗性。一旦引入新环境，knapweed就能与本土植物争夺阳光、水分和养分等资源。这种侵略性的生长习性使其能够主导景观，导致生物多样性的下降。在许多地区，knapweed的存在与本土植物种群的减少有关，而这些植物又是依赖于这些植物作为食物和栖息地的动物。此外，knapweed的蔓延对农民构成了重大挑战。这种杂草可能侵入牧场和农田，降低牲畜的饲料质量并减少作物产量。经济影响是相当可观的，因为农民通常要花费大量资金在除草剂和其他控制措施上，以管理knapweed的侵扰。此外，所使用的化学处理可能对周围生态系统产生不利影响，进一步复杂化了问题。控制knapweed的努力包括机械去除、化学处理和生物控制方法。生物控制涉及引入天然捕食者或竞争者来帮助管理knapweed的扩散。例如，某些专门以knapweed为食的昆虫已经在一些地区被引入，希望能够遏制其生长。尽管这些方法可以有效，但它们需要仔细规划和监测，以确保不会无意中伤害本土物种。教育和意识在对抗knapweed的斗争中至关重要。通过向公众宣传这种入侵物种的危险，我们可以鼓励负责任的园艺和景观实践。例如，园丁在购买植物时应谨慎，确保他们不会无意中将knapweed或其他入侵物种引入自己的院子。社区努力，例如组织除草活动和教育研讨会，也可以在管理knapweed种群方面发挥重要作用。总之，虽然knapweed可能是一种美丽的植物，但其对生态系统和农业的影响不可忽视。当我们继续应对入侵物种带来的挑战时，了解knapweed的生物学和行为将是必不可少的。通过在管理、教育和预防方面的共同努力，我们可以朝着保护本土生态系统和确保自然平衡保持完整的目标迈进。