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自己动手修剪植物英语作文

时间：2021-01-17 15:16:39 植物作文我要投稿

自己动手修剪植物英语作文

　　This is the VOA Special English Agriculture Report.

自己动手修剪植物英语作文

　　Pruning makes no sense. You cut off parts of a plant. Yet the plant is supposed to grow back even better than before? This demands an answer.

　　The explanation begins with the apical bud. This bud is at the end of the actively growing tip of the plant.

　　Apical buds produce a growth hormone called auxin. The buds release this hormone down the plant stem. When the top of the main shoot is removed -- by pruning or breakage -- the auxin is no long produced.

　　This causes buds to the side, called lateral buds, to wake up and start growing. The result: better plant development.

　　Pruning can also remove unhealthy or unneeded parts of a plant, and increase the growth of flowers and fruit.

　　Generally, the best time to prune is in late winter, before spring growth starts. But gardening experts at the University of Florida extension point out some exceptions.

　　For example, spring-blooming plants like spireas and azaleas should be pruned after they bloom. Then pinch the new shoots between your thumb and forefinger. That will help them develop branches that produce new blooms.

　　Plant expert Doug Welsh says when you prune a rosebush, crape myrtle or shade tree, first remove dead, broken or diseased parts. Cut at the place where the problem begins. "Deadhead," or take off, dead blooms.

　　Remove any branches that touch another branch; leave the stronger one or the one that is in a better position. Remove any branches growing in the same space as the branches next to them. Also prune branches growing toward the ground, high branches growing straight up and shoots growing from the base of the tree.

　　But Doug Welsh, a professor at Texas A&M University, says not to go too far with pruning. He says a lot of it can be avoided just by choosing the right plant for the right space. "People can ruin what nature has created," he says.

　　Melissa Snyder, a master gardener in Manatee County, Florida, says pruning wounds a plant. People do not need to put anything on the wound, she says. But they do need to be careful not to wound themselves with chainsaws or other pruning tools.

　　Also, tools can spread disease from one plant to another. So be sure to disinfect tools with alcohol or bleach after each plant.

　　And that's the VOA Special English Agriculture Report, written by Jerilyn Watson. Next week, learn about new scientific understanding of how pruning works. And for more gardening advice, go to 51voa.com. I'm Steve Ember.

　　这里是VOA特别英语农业报道。

　　修剪是没有意义的。你剪掉植株的一部分，然而，植株会长的比以前更加茂盛。这需要一个答案。

　　解释要从顶芽开始。顶芽位于植株活跃的生长点末端。

　　顶芽分泌出叫做生长素的生长类激素。顶芽将生长素释放至植株茎部。当主芽的顶端被修剪或受到损坏时，将不能再分泌生长素。

　　这将导致侧芽苏醒并开始生长。结果是，植株生长的更加茂盛。

　　修剪还可以移除植株不健康或不必要的部分，促进花朵或果实的生长。

　　总体来说，修剪植株的最佳时间是在冬末，植株开始生长之前。但是佛罗里达推广大学的园艺专家指出，也有一些植物例外。

　　例如，像绣线菊和杜鹃花这样春天开花的植物，应该在开花之后进行修剪。然后掐掉长度在拇指和食指之间的新芽。这可以帮助催生新的枝干，开出更多的花。

　　植物学专家Doug Welsh表示，修剪玫瑰丛，桃金娘或者能遮荫的'数木时，应该首先剪掉枯死，断裂或患病的部分，从出现问题的地方开始修剪。除掉枯死的花朵。

　　剪掉所有与其他枝干相接触的树枝，留下比较强壮或者位置更好的一个。剪掉所有与邻近枝条在同样的空间生长的树枝。剪掉向地面生长的树枝，直直向上生长的树枝和从树木底部生长出来的枝条。

　　但是得克萨斯A&M大学的Doug Welsh说，不要过度修剪。他说，选择正确的植株，种植在正确的地方可以避免许多修剪工作。“人们会毁掉自然界创造的东西。”他说。

　　佛罗里达Manatee郡的主要园艺师Melissa Snyder说，修剪会使植株受伤。人们不需要在伤口放置任何物质。但是，需要注意，不要使锯条或其他修剪工具伤到自己。