农民种庄稼烦心的事之一就是野草,野草在田地里与庄稼竞争,争夺阳光和养分。为了保护庄稼生长,除草成了农民的日常工作。然而,野草除不尽,春风吹又生,野草生命力实在太强。现代农业普遍使用化学除草剂代替人工除草,除草的效率大大提高,但是除草剂不仅增加了农民的经济负担,其危害也十分明显,除草剂的化学残留成分使粮食和地下水受到污染,影响生态环境。 多少年来,科学家一直在研究快速 One of the things farmers worry about crops is the weeds. The weeds compete with the crops in the fields for the sunshine and nutrients. In order to protect the growth of crops, weeding has become a peasant’s daily task. However, in addition to the weeds, spring breeze again, weeds vitality is too strong. Modern herbicides generally use chemical herbicides instead of artificial weeding, which greatly increases the efficiency of weeding. However, the herbicides not only increase the economic burden on farmers, but also have obvious harm to them. The chemical residues of herbicides contaminate food and groundwater and affect the ecological environment . For years, scientists have been studying fast