nematode

简明释义

英[ˈnemətəʊd]美[ˈnemətoʊd]

adj. 线虫类的

n. 线虫，线虫类

英英释义

单词用法

同义词

反义词

例句

1.High abundance ratio between nematode and benthic copepoda at shrimp ponds was related to disturbance.

虾池海洋线虫与底栖挠足类丰度比率较高，与人为扰动有关。

2.The result indicates that the highest yield of infective nematode can be obtained in air lift internal loop bioreactor.

结果显示，气升内环流反应器最适合于线虫的培养，不仅产量高而且线虫侵染率亦高。

3.The measurements and morphological description of two population of this nematode were given.

对此线虫两个群体进行了形态学测量和描述。

4.Neem oil has the effects of insecticide, anti-fungi, anti-bacterial, anti-virus, and control the nematode.

印楝油对农作物害虫具有防治作用，而且具有抗菌、抗病毒的能力，还可用于线虫的防治。

5.The experiment showed that the morphological structure of the sweet potato can prohibit invasion of potato rot nematode effectively.

表皮接种线虫结果表明，这种形态结构可有效阻止马铃薯腐烂线虫侵入。

6.The effect of Rugby granular in different dosage on sweet potato stem nematode was tested in indoor and outdoor experiments.

试验研究了室内、室外不同剂量的克线丹颗粒剂对甘薯茎线虫病的防治效果。

7.Mermithidae is a group of insect's parasitic nematode with diversified morphological characters and host specificity.

索科线虫是一类昆虫寄生线虫，其形态多样而且具有较高的宿主特异性。

8.The farmer discovered that the crop damage was caused by a type of nematode.

农民发现作物损害是由一种线虫造成的。

9.Research shows that certain nematodes can be beneficial for soil health.

研究表明，某些线虫对土壤健康是有益的。

10.Gardeners often use nematodes as a natural pest control method.

园丁们常常使用线虫作为一种天然的害虫控制方法。

11.The scientist studied the life cycle of a specific nematode species.

科学家研究了一种特定线虫物种的生命周期。

12.Some nematodes are known to infect plant roots and cause diseases.

一些线虫已知会感染植物根部并导致疾病。

作文

Nematodes, often referred to as roundworms, are a diverse group of organisms that play significant roles in various ecosystems. These microscopic creatures are found in soil, freshwater, and marine environments, making them one of the most abundant animals on Earth. The term nematode (线虫) encompasses thousands of species, each adapted to its unique habitat and ecological niche. Understanding nematodes is crucial for both environmental science and agriculture due to their impact on soil health and crop productivity. The morphology of nematodes is fascinating. They have elongated, cylindrical bodies that are tapered at both ends, which allows them to move easily through soil and water. Most nematodes are less than a millimeter in diameter, but their small size does not diminish their ecological importance. They possess a simple body plan with a cuticle, a muscular pharynx, and a digestive system that runs from mouth to anus. This basic structure enables them to feed on a variety of organic materials, including bacteria, fungi, and even larger organisms. In agricultural contexts, nematodes can be both beneficial and harmful. Some species, such as the root-knot nematode (根结线虫), are notorious for causing significant damage to crops by infecting plant roots and disrupting nutrient uptake. This can lead to reduced crop yields and economic losses for farmers. Conversely, other nematodes, like predatory or beneficial nematodes, help control pest populations by feeding on harmful insects and nematodes. This dual role highlights the complexity of nematodes in agricultural ecosystems and the need for careful management practices to balance their benefits and drawbacks. Research on nematodes has also provided insights into biodiversity and ecosystem functioning. As indicators of soil health, the presence and diversity of nematodes can reveal important information about the quality of the environment. For instance, a high diversity of nematodes typically indicates a healthy soil ecosystem, while a predominance of parasitic species may signal ecological imbalance. Scientists study these organisms to understand better how they contribute to nutrient cycling, decomposition, and overall soil fertility. Moreover, nematodes have become an essential tool in biological research. The model organism Caenorhabditis elegans is a type of free-living nematode widely used in genetic and developmental biology studies. Its transparent body and simple nervous system allow researchers to observe cellular processes in real time, leading to significant discoveries in fields such as neurobiology and genetics. In conclusion, nematodes are a vital component of our ecosystems, influencing soil health, agricultural productivity, and scientific research. Their diverse roles, ranging from beneficial organisms to agricultural pests, underscore the importance of understanding these tiny yet powerful creatures. As we continue to explore the complexities of nematodes, we gain valuable insights into maintaining sustainable agricultural practices and preserving ecological balance. Thus, fostering a deeper appreciation for nematodes can lead to more informed decisions regarding land use and environmental conservation efforts.

线虫，通常被称为圆形蠕虫，是一个多样化的生物群体，在各种生态系统中发挥着重要作用。这些微小的生物在土壤、淡水和海洋环境中广泛存在，使它们成为地球上最丰富的动物之一。术语nematode（线虫）涵盖了数千种物种，每种物种都适应其独特的栖息地和生态位。理解nematodes对于环境科学和农业至关重要，因为它们对土壤健康和作物生产力的影响。 nematodes的形态学非常迷人。它们具有细长、圆柱形的身体，两端逐渐变尖，这使它们能够轻松穿过土壤和水域。大多数nematodes直径不足一毫米，但它们的小尺寸并没有减弱它们的生态重要性。它们拥有简单的身体结构，包括外骨骼、肌肉性咽喉和从口到肛门的消化系统。这种基本结构使它们能够以多种有机物为食，包括细菌、真菌甚至更大的生物。 在农业背景下，nematodes可以是有益的，也可以是有害的。一些物种，如根结nematode（根结线虫），因感染植物根部并干扰养分吸收而臭名昭著，造成作物严重损害。这可能导致作物产量下降和农民经济损失。相反，其他nematodes，如捕食性或有益nematodes，通过以有害昆虫和线虫为食来帮助控制害虫种群。这种双重角色突显了nematodes在农业生态系统中的复杂性，以及需要仔细管理实践以平衡它们的好处和缺点。 对nematodes的研究还提供了关于生物多样性和生态系统功能的重要见解。作为土壤健康的指示器，nematodes的存在和多样性可以揭示有关环境质量的重要信息。例如，高多样性的nematodes通常表明健康的土壤生态系统，而寄生物种的主导可能表明生态失衡。科学家们研究这些生物，以更好地理解它们如何促进养分循环、分解和整体土壤肥力。 此外，nematodes已成为生物研究中的重要工具。模式生物Caenorhabditis elegans是一种广泛用于遗传学和发育生物学研究的自由生活nematode。它透明的身体和简单的神经系统使研究人员能够实时观察细胞过程，从而在神经生物学和遗传学等领域取得重大发现。 总之，nematodes是我们生态系统的重要组成部分，影响土壤健康、农业生产力和科学研究。它们作为有益生物和农业害虫的多样角色强调了理解这些微小而强大的生物的重要性。随着我们继续探索nematodes的复杂性，我们获得了关于维持可持续农业实践和保护生态平衡的宝贵见解。因此，培养对nematodes的更深入理解，可以帮助我们在土地使用和环境保护方面做出更明智的决策。