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以山东省沂蒙山区夏玉米田为研究对象,设化学除草剂除草(CK)、不除草(W0)、苗期人工锄草1次(W1)、苗期+开花期人工锄草两次(W2)4种处理方式,研究除草次数对农田杂草生物多样性和对夏玉米产量的影响。结果表明,玉米田中9种杂草的多样性指数以W0处理最高,W1处理次之;花后40 dW1、W2处理玉米地上部生物量与CK差异不显著(P0.05)W0处理与CK差异显著(P0.05)产量也表现出相同规律。研究表明,当地苗期适时进行1次除草,不仅能维持杂草多样性,而且可避免作物产量损失;与人工锄草两次相比,次除草能省工省时,减少成本。
Taking the summer maize field in Yimeng Mountain area of Shandong Province as the research object, artificial herbicide weeding (CK), weeding (W0), artificial weeding at seedling stage (W1) and seedling + flowering stage ) Four treatments to study the effect of weeding on the weed biodiversity and the yield of summer maize. The results showed that the diversity index of 9 weeds in maize field was the highest in W0 and the next in W1; the aboveground biomass of CK and W2 was not significantly different from CK (P> 0.05) Significant (P <0.05) yield also showed the same pattern. The research shows that weeding at one time in the local seedling stage can not only maintain weed diversity but also avoid crop yield loss. Compared with artificial weeding twice, weeding can save time and reduce costs.