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本文研究了沙打旺产量损失与狗尾草密度之间的关系,建立了狗尾草生态经济阈值模型和生态经济除草阈值模型。计算结果表明,当杂草密度低于阈值时,不需要防除。
In this paper, the relationship between the yield loss of Setaria rubra and the density of Setaria viridis was studied. The threshold value of Setaria viridis and the threshold model of eco-economic weed control were established. The calculated results show that when the weed density is below the threshold, no control is needed.