论文部分内容阅读
一年一度的植树节即将到来。每年到这个时候,每个单位、每个人都会投入到植树造林的热潮之中。但很少有人会认真思考一下:什么样的植树造林才是科学的。首先,不是每个地方都适合植树。比如在年降水量少或者灌溉不易的地方,就不适合植树。强行在这些地方植树,由于要长年累月维持人工灌溉,成本很高,得不偿失。其次,植树造林不能只讲量不讲质。我们看到每年各地总结植树节成绩,总要说种下多少多少棵树。数量很庞大,成绩很漂亮。但这些种下的树最后都成活了没有,却没有多少人关心。植树节设立以来已经三十多年,有人开玩笑,如果中国人此期间种下的每一棵
The annual Arbor Day is coming. At this time of year, every unit and every individual is devoted to the upsurge of afforestation. But few people think hard about what kind of afforestation is science. First, not every place is suitable for planting trees. For example, it is not suitable for planting trees in areas with little annual precipitation or poor irrigation. Forcing trees to be planted in these places is costly and costly because of the need to maintain artificial irrigation for many years. Second, afforestation can not only talk about quantity and lack of quality. We see annual results of Arbor Day concluded, always say how many trees planted. The number is very large, the results are very beautiful. However, these kinds of trees have finally survived, but not many people care about. It has been more than 30 years since the Arbor Day was set up. It is a joke that if every Chinese plant