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近年来,随着化学除草剂的推广使用,推动了对农田杂草生态和生物学特性的研究。在农田里作杂杂草就得采取措施防除,而在农田以外,杂草不但不能破坏,还要采取措施保护。因此,为了更好地防除农田杂草和保护农田以外的草本植物,首先要认识杂草。本文对菊科、苋科等十三科三十种农田杂草幼苗的特征描述于下,仅供参考。
In recent years, with the popularization and application of chemical herbicides, the research on ecological and biological characteristics of farmland weeds has been promoted. Weeds in the farmland have to take measures to control, and in the field outside, weeds not only can not be destroyed, but also take measures to protect. Therefore, to better control weeds in farmland and protect herbs other than farmland, we must first understand weeds. This article on Compositae, Amaranthus and other Thirteen families of 30 kinds of farmland weed seedling characteristics described below, for reference purposes only.