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本文旨在描述在大面积范围内测定自然发病对作物产量的影响.它描述了1981年美国爱德荷州的Kootenai流域小麦病害的调查情况,包括样点的选择以及使用杀菌剂以降低或消除天然流行的不同比重的多种病害.最后,试图确定该地区由于病害造成小麦减产的数量.为此,在每一个样点测定了产量对人工诱导减轻病害的反应.根据田间资料用多元线性回归方程计算了一种和几种病害对产量的影响.在该方程中把产量作为不同病害发生水平的函数.其一般式为:y=b_0+b_1x_1+b_2x_2+……
This paper aims to characterize the effect of natural occurrence on crop yields over a large area and describes the survey of wheat disease in the Kootenai Valley, Idaho, USA in 1981, including sample selection and the use of fungicides to reduce or eliminate Natural prevalence of various diseases of different weights.Finally, trying to determine the number of wheat yield reduction due to disease in the area.Therefore, in each sample was measured on the production of artificial induced lesion response.According to field data using multiple linear regression The equation calculates the effect of one or several diseases on the yield, in which the yield is taken as a function of the level of occurrence of different diseases. The general formula is: y = b_0 + b_1x_1 + b_2x_2 +