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为了综合治理谷田杂草,探索谷田杂草对谷子的危害及竞争规律。采用田间小区试验和非线性回归分析的方法,对主要的杂草竞争经验模型进行模拟和比较。结果表明,谷子产量损失率与杂草密度呈显著正相关,且随着杂草密度的增加呈减速增加的趋势。双曲线模型的决定系数R2为0.99712,最小残差平方和为16.174,是模拟谷田杂草与谷子竞争关系的优化模型。预测方程式为Y=d/(1.733+0.018d),杂草的种间竞争力为0.5770,种内竞争力为0.0103,谷子产量最大损失率为55.56%。本研究确定了谷田杂草对谷子为害的预测模型,将为谷田杂草综合治理提供有益帮助。
In order to comprehensively control the weeds in the valley, we explored the damage and competition rules of the weeds in the valley. Field trial and non-linear regression analysis methods were used to simulate and compare the main weed competition experience models. The results showed that the yield loss of millet was significantly and positively correlated with weed density, and decreased with the increase of weed density. The determination coefficient R2 of hyperbolic model is 0.99712 and the sum of squares of minimum residuals is 16.174, which is an optimization model to simulate the competition between weed and millet. The prediction equation was Y = d / (1.733 + 0.018d). The interspecific competitiveness of weeds was 0.5770, the intraspecific competitiveness was 0.0103, and the maximum loss rate of millet was 55.56%. In this study, the prediction model of the weed damage to the millet was established, which will provide useful help for the comprehensive management of the weed in the valley.