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我区农田杂草中,豆科和藜科杂草种类很多,有关它们成株期的形态特征资料较多,易于识别,唯有关幼苗的描述很少见。为了适应大面积化学除草的需要,我们专门种植了杂草圃,对这两科的主要杂草幼苗进行了观察。现将它们的主要形态特征简述如下。 一、几种豆科杂草幼苗形态特征 1.细叶百脉根(Lotus fenuis Kit.) 上、下胚轴明显,细长。子叶卵圆形,长3.5—4.5毫米,叶柄细长,光滑。初生叶
Weed farmland weeds, leguminous and chenopodia weeds a lot, the morphological characteristics of their adult plant more information, easy to identify, only the description of seedlings is rare. In order to meet the needs of large-scale chemical weeding, we have specially planted weed farms to observe the major weed seedlings in these two families. Now their main morphological characteristics are summarized as follows. First, the morphological characteristics of several seedlings of leguminous weeds 1. Lotus leaf Lotus (Lotus fenuis Kit.), Hypocotyl obvious, slender. Cotyledons ovate, 3.5-4.5 mm long, petiole slender, smooth. Newborn leaves