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莠子是谷田的主要杂草之一,它和谷子均属禾本科狗尾草属,其幼苗和谷子很相似,且长势健壮,在间苗时往往被当成谷子留下,不仅造成谷子减产,而且导致莠子蔓延。一、谷田莠子的来源: 1.土壤中存带。莠子适应性广,生活力强,既可在高水肥条件下生长,也可在干旱瘠薄的条件下繁衍,成熟的种子在土壤中可存活2年以上。在管理粗放的谷田及花生等矮秆作物农田中,往往长有大量谷莠子,其种子成熟后落入土壤中,即成为来年莠子的重要来源。
It is one of the main weeds in the valley. It is a grass of the genus Setaria and its seedlings are very similar to the millet, and are robust. They are often left behind as millet, which not only reduces the yield of millet, Sub-spread. First, the source of Gutian hydra: 1. The soil is stored. With wide adaptability and strong viability, the herbivores can grow under high water and fertilizer conditions and can also multiply under arid and infertile conditions. The mature seeds can survive in the soil for more than two years. Of the dwarf crop farms, such as broad-leaved valley and peanut farms, there are often a large number of valley-sized pests that fall into the soil as they mature and become an important source of the herbivores for the coming year.