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烟草是我国的一种重要经济作物,在南北方均有种植.烟田杂草是影响烟叶产量和品质的一个重要因素,烟田杂草与烟草争水、争肥、争空间、争阳光,直接影响烟株的生长发育.一、杂草的危害性及种类烟草种子极小,幼苗生长缓慢,如果苗床内杂草较多,轻者使烟苗瘦弱,严重的苗床可全被杂草占据.烟田移栽到大田初期,其生长速度比较慢,防除杂草若不及时,极易造成杂草的“欺苗”现象.另外,有些杂草是烟草病虫害的奇主或栖息场所,烟田杂草丛生,为病虫害的发生、发展创造了适宜条件.
Tobacco is one of the most important economic crops in our country, and it is planted in the north and the south.Weed weeds in tobacco fields are an important factor affecting the yield and quality of tobacco leaves. Tobacco weeds compete with water, fight fertilizer, fight for space, Directly affect the growth and development of tobacco plants. First, the harmfulness of weeds and species Tobacco seeds are extremely small, seedling growth is slow, if the weeds in the bed more light, so thin seedling, severe seedbed can be occupied by weeds In the early days of transplanting tobacco fields to the field, the growth rate is relatively slow, if not timely weed control weeds can easily lead to the phenomenon of “bullying seedlings.” In addition, some weeds are the main tobacco or pests habitat, tobacco Field overgrown with weeds, for the occurrence and development of pests and diseases to create suitable conditions.