VOA慢速：如何限制花园里的杂草生长

燕山大学 刘立军 供稿

【TRANSCRIPT】

Weeds, the fast-growing plants that cannot be eaten and do not bring flowers, are a common problem for gardeners. Some use chemicals to kill weeds. Others pull them up by hand or with heavy machinery. Luckily, there are other ways to limit their growth.

l Mulches

For starters, there are mulches which can bury weeds. Mulches are made from organic material, such as leaves, grass cuttings, and small pieces of wood, or inorganic material like plastic. They are spread over the ground in a garden to control weeds.

Organic mulches break down over time so you must add more to your garden often. That is not a bad thing, because their decomposition creates nutrients for plants and humus to keep soil wet and full of fresh air.

Plastic mulch is another way to stop weeds. Common black plastic is easy to lay down. It also effectively blocks weeds and helps soil warm faster in the spring. Recent experiments with other colored plastic have shown effects on both bugs and plant growth. A reflective plastic mulch, for example, keeps some plant-eating insects away.

A major problem with plastic is that it breaks apart over time, so eventually it needs to be thrown away. It also adds nothing to the soil as far as nutrients or humus. And plastic also can block air from reaching the soil.

One kind of mulch that combines some of the qualities of both plastic and organic material is paper. Paper mulch is easy to lay down and eventually decomposes. However, paper adds little to the soil in terms of humus or nutrients.

l Birds

For larger gardens where the weeds are mainly grasses, a somewhat unusual way to control them is using the birds known as geese.

Young geese will eat their weight in weeds every day. A small group of geese can clear weeds in half a hectare of land and keep each other company. All you need to provide is water, protection from the sun, and some additional feed. You also need barriers to keep the geese in and other animals out. One warning, though, do not plant corn or they will eat that, too.

l Other ways to control weeds

Finally, in addition to direct attacks on weeds, how you plant your garden can indirectly influence weed growth.

For example, close spacing of plants in the garden blocks sunlight from reaching the ground and can limit weed growth. And using a watering method known as drip irrigation will direct small amounts of water to the roots of your plants instead of the weeds.

Whether or not you dig up your soil also influences weed growth. Lying in soil are millions of weed seeds just waiting to be awakened by light and air.

Using any or all of the methods will not permanently stop weed growth. Instead, your goal is simply to limit their growth in the garden.

I'm Pete Musto.

【VOCABULARY】

1. mulch n. 覆盖物，护根（用以保护植物根基、改善土质或防止杂草生长）

2. decomposition n. 分解; 腐烂

3. humus n. a substance made from dead leaves and plants, added to soil to help plants grow 腐殖质

【QUESTIONS】

Listen to the news and choose the best answer to each question you hear.

Q1: Which of the following can block air from reaching the soil?

A. Wood mulch.

B. Plastic mulch.

C. Organic mulch.

D. Paper mulch.

Q2: Which of the following statements about geese is FALSE?

A. Young geese will eat their weight in weeds every day.

B. All you need to provide is water, protection from the sun, and some additional feed.

C. You also need barriers to keep the geese in and other animals out.

D. You can plant corn in the garden to protect geese from the sun.

Q3: What is the main idea of the news?

A. Weeds are a common problem for gardeners.

B. Chemicals are an effective way to kill weeds.

C. Pulling them up by hand is a more effective way to kill weeds.

D. Any method will not permanently stop weed growth.

【KEY】

Q1: B。细节题。命题出处：A major problem with plastic is that it breaks apart over time, so eventually it needs to be thrown away. It also adds nothing to the soil as far as nutrients or humus. And plastic also can block air from reaching the soil.

Q2: D。推断题。命题出处：Young geese will eat their weight in weeds every day. A small group of geese can clear weeds in half a hectare of land and keep each other company. All you need to provide is water, protection from the sun, and some additional feed. You also need barriers to keep the geese in and other animals out. One warning, though, do not plant corn or they will eat that, too.

Q3: D。推断题。命题出处：Using any or all of the methods will not permanently stop weed growth. Instead, your goal is simply to limit their growth in the garden.