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草是个颇具“矛盾”的植物,有的受到优遇,有的却遭到灭顶之灾。为什么呢?请往下看。 非凡的生命力 在农业生产中,草被称为杂草,即非有意识栽培的植物,如油菜地里的看麦娘、水稻田里的稗草等。在我国,为害农业生产的杂草大约有1000多种。 在与自然界及人类漫长的抗争过程中,杂草逐渐形成了生命力旺盛、繁殖能力强、传播方式多样等特点,这使它们能够在恶劣的环境条件下繁衍生息。 杂草种子的寿命极长。当杂草种子成熟后,如果外界条件不适于生长,种子便在土壤中长时间休眠而不损失其生命力。稗草的种子可保存15年,荠菜的种子可在土壤中
Grass is a rather “contradictory” plant, and some are favored, while others are drowned. Why? Please read on. Extraordinary vitality in agricultural production, grass is called weeds, that is, plants that are not consciously cultivated, such as Amanita in rape fields, barnyardgrass in paddy fields, and the like. In our country, there are about 1,000 kinds of weeds that harm agricultural production. In the protracted protests with nature and mankind, weeds have gradually developed the characteristics of strong vitality, strong reproductive capacity and diversified modes of propagation, allowing them to flourish under harsh environmental conditions. Weed seeds have a long life expectancy. When the weed seeds mature, if the external conditions are not suitable for growth, the seeds will sleep in the soil for a long time without losing their vitality. Barnyard grass seeds can be preserved for 15 years, shepherd’s purse seeds can be in the soil