topsoil

简明释义

英[ˈtɒpsɔɪl]美[ˈtɑːpsɔɪl]

n. 表层土；上层土

英英释义

单词用法

同义词

反义词

例句

1.Topsoil is a precious resource, and we don't have enough topsoil to replace it.

表层土是非常珍贵的资源，我们不可能找来足够的表层土去覆盖那些受过铅污染的区域。

2.The deep, brown topsoil of the North China Plain is planted with wheat, corn, millet, sorghum and cotton.

华北平原大多是褐色土壤，土层深厚，农作物有小麦、玉米、谷子、棉花等。

3.When it rains hard, landslides sweep topsoil down to the sea.

下大雨的时候，山崩会把表层泥土席卷到海里。

4.Mud slides and floods are likely, with streams and rivers carrying off the topsoil.

泥石流和洪水很有可能会发生，河流将冲走表层泥土。

5.With hoes and axes, they crafted flat, wide terraces and a simple water-management system that would keep valuable topsoil in place.

手拿锄头和斧子，他们精心的建造出自己的平地，梯田，和简单的水处理系统，这样可以保持住最肥沃的表层土不要流失。

6.Topsoil is a precious resource, and we don’t have enough topsoil to replace it.

表层土是非常珍贵的资源，我们不可能找来足够的表层土去覆盖那些受过铅污染的区域。

7.Calm and peaceful for most of the year, the Nile used to flood annually, thereby creating, irrigating and carrying new topsoil to the nearby farmland on which ancient Egypt depended for livelihood.

尼罗河虽然在一年的大部分时间里平静而祥和，但是过去每年都会泛滥，从而生成、灌溉并把新的表层土搬运到附近的古埃及人赖以为生的农田。

8.Irregular rainfall and loss of topsoil means that the land produces less than before.

无常的降水和表层土壤的流失都使土地逐渐减产。

9.The topsoil has been almost completely washed away.

表层土壤已差不多完全给冲走了。

10.Erosion can wash away valuable topsoil, making it difficult for plants to grow.

侵蚀可以冲走宝贵的表土，使植物难以生长。

11.Farmers often test the topsoil to ensure it has the right nutrients for crops.

农民通常会测试表土以确保它具有适合作物的营养成分。

12.Adding compost to the topsoil can improve soil fertility.

在表土中添加堆肥可以提高土壤的肥力。

13.The gardener carefully removed the topsoil to plant new flowers.

园丁小心地移走了表土以种植新花。

14.After heavy rains, the topsoil became muddy and difficult to work with.

大雨过后，表土变得泥泞，难以操作。

作文

Topsoil is one of the most critical components of our ecosystem. It is the uppermost layer of soil, typically ranging from a few inches to a foot deep, and it is where most of the biological activity takes place. The importance of topsoil (表土) cannot be overstated; it is the layer that supports plant life, provides nutrients, and helps retain moisture. Without healthy topsoil (表土), agriculture would struggle, and natural ecosystems would be severely disrupted.In many regions around the world, topsoil (表土) is being lost at an alarming rate due to various human activities. Deforestation, urbanization, and industrial agriculture all contribute to the degradation of this vital resource. When trees are cut down or land is paved over, the protective cover that prevents erosion is removed. Rainwater then washes away the topsoil (表土), leading to a loss of fertility and the ability to grow crops.Moreover, the use of chemical fertilizers and pesticides can further degrade topsoil (表土). While these chemicals may provide immediate benefits to crops, they can harm the microorganisms in the soil that are essential for maintaining its health. Healthy topsoil (表土) is rich in organic matter and teeming with life, which helps break down nutrients and makes them available to plants. When these microorganisms are killed off, the topsoil (表土) becomes less productive over time.Another significant issue concerning topsoil (表土) is erosion. Wind and water can easily erode topsoil (表土) if it is not protected by vegetation. This is particularly problematic in areas that have been over-farmed or where natural vegetation has been removed. Erosion not only removes the nutrient-rich layer of soil but also contributes to sedimentation in rivers and streams, which can harm aquatic ecosystems.To combat the loss of topsoil (表土), sustainable agricultural practices must be adopted. Crop rotation, cover cropping, and reduced tillage are some methods that can help preserve topsoil (表土) and maintain soil health. By rotating crops, farmers can prevent nutrient depletion and reduce pest populations. Cover crops, such as clover or rye, can protect the topsoil (表土) from erosion during the off-season and add organic matter back into the soil when they decompose.Additionally, reforestation efforts can help restore areas where topsoil (表土) has been lost. Planting trees not only protects the soil from erosion but also enhances biodiversity and improves air quality. Community initiatives aimed at educating people about the importance of topsoil (表土) can also play a crucial role in conservation efforts.In conclusion, topsoil (表土) is an invaluable resource that supports life on Earth. Its preservation is essential for food security, environmental health, and sustainable development. As we face the challenges of climate change and population growth, understanding the significance of topsoil (表土) and taking action to protect it will be vital for future generations. We must recognize that every effort counts in the fight against soil degradation and work together to ensure that our topsoil (表土) remains healthy and productive for years to come.

表土是我们生态系统中最关键的组成部分之一。它是土壤的最上层，通常厚度从几英寸到一英尺不等，是大多数生物活动发生的地方。topsoil（表土）的重要性不容小觑；这是支持植物生命、提供养分并帮助保持水分的层。如果没有健康的topsoil（表土），农业将面临困境，自然生态系统也会受到严重干扰。在世界许多地区，topsoil（表土）正以惊人的速度流失，这主要是由于各种人类活动。森林砍伐、城市化和工业农业都在导致这一重要资源的退化。当树木被砍伐或土地被铺设时，防止侵蚀的保护层就会被移除。雨水随后冲走topsoil（表土），导致肥力和种植作物的能力下降。此外，化肥和农药的使用也会进一步退化topsoil（表土）。虽然这些化学品可能为作物提供即时的好处，但它们可能会损害土壤中对维持其健康至关重要的微生物。健康的topsoil（表土）富含有机物，生机勃勃，有助于分解养分并使其对植物可用。当这些微生物被杀死时，topsoil（表土）随着时间的推移变得不那么高效。关于topsoil（表土）的另一个重大问题是侵蚀。风和水如果没有植被的保护，很容易侵蚀topsoil（表土）。这在过度耕作或自然植被被移除的地区尤为严重。侵蚀不仅去除了富含营养的土层，还导致河流和溪流的沉积，这可能会危害水生生态系统。为了应对topsoil（表土）的流失，必须采用可持续农业实践。作物轮作、覆盖作物和减少耕作是一些可以帮助保护topsoil（表土）并维护土壤健康的方法。通过轮作，农民可以防止养分耗竭并减少害虫数量。覆盖作物，如苜蓿或黑麦，可以在淡季保护topsoil（表土）免受侵蚀，并在分解时将有机物质重新加入土壤。此外，植树造林的努力可以帮助恢复topsoil（表土）流失的地区。植树不仅可以保护土壤免受侵蚀，还可以增强生物多样性并改善空气质量。旨在教育人们认识topsoil（表土）重要性的社区倡议也可以在保护工作中发挥关键作用。总之，topsoil（表土）是一种无价的资源，支持着地球上的生命。保护它对于粮食安全、环境健康和可持续发展至关重要。面对气候变化和人口增长的挑战，理解topsoil（表土）的重要性并采取行动保护它，对于未来几代人至关重要。我们必须认识到，在抗击土壤退化的斗争中，每一个努力都是重要的，携手合作以确保我们的topsoil（表土）在未来几年保持健康和高产。