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以肇庆市为代表,分析了广东省中部晚造稻飞虱种群数量变动的一般规律。用逐步回归方法,在IBM-PC/XT 电子计算机上选择关键因子,将褐稻虱、白背飞虱、稻飞虱(两种飞虱总量)分别组建了5个多因子主害代(第七代)发生程度的预测模型。这些模型的复相关系数均达极显著程度,经x~2检验,其理论值和实测值的拟合概率为99.5%,用1990年实测数据检验,与实际相符。
Taking Zhaoqing City as the representative, this paper analyzed the general law of late change of population of planthopper in central Guangdong Province. By stepwise regression, key factors were selected on the IBM-PC / XT computer to establish five multi-factorial major offspring of brown planthopper, white-backed planthopper and planthopper (total amount of two planthoppers) Seventh generation) prediction model of the degree of occurrence. The complex correlation coefficients of these models reached extremely significant degree. After x ~ 2 test, the fitting probability of the theoretical value and the measured value was 99.5%, which was verified by the measured data of 1990 and was in accordance with the actual.