论文部分内容阅读
在自然界中,某些种类的植物体内可以产生一种能够杀死别的植物的“异株克生物质”。美国农业部农业研究站的科学家们正在研究这类物质的除草活性,专家们认为,在未来的农业生产中,此种天然除草剂将担任一个十分重要的角色。但是,到目前为止,已经合成出来的此种天然化合物还不到一粒阿斯匹林药片那样大,因而还不能用于实践。美国农业部农业研究站的植物生理学家Gerald R.Leather说,一种极小的池塘漂浮
In nature, some species of plants produce “isogenic material” capable of killing other plants. Scientists at the U.S. Department of Agriculture’s Agricultural Research Station are studying the herbicidal activity of these substances and experts believe such natural herbicides will play an important role in future agricultural production. However, so far, the natural compound that has been synthesized is less than as large as an aspirin tablet and therefore can not be used in practice. Gerald R. Leather, a plant physiologist at the Agricultural Research Station at the U.S. Department of Agriculture, said a tiny pond floats