小麦各生育期的两种麦蚜种群动态研究

STUDIES ON POPULATION DYNAMICS OF SCHIZAPIS GRAMINUM AND MACROSIPHUM AVENAE IN DIFFERENT GROWTH PERIODS OF WHEAT

高、中氮肥条件下二叉蚜的种群曲线为"J"形和"S"形、其数学模型依次为y＝35.7446e^0.1072x和y=；高、中氮肥条件下长管蚜的种群曲线均为"凸"形，5月3日即灌浆期前的种群数学模型依次为y＝16.6515e^0.199x和=18.752e^0.201x，5月3日后种群数学模型依次为y＝1156432e^-0.1977x和y＝6545903ee~－0.2233x其结果可为两种麦蚜的预测预报提供科学依据。

Under application of high and medium rates of N fertilizer,population dynamics of Schizaphis graminum was 'J' and 'S'curves, models were y=35.7446-e^0.1072x and y=5277/14 e^7.1022-0.2193x reapectively. Population dynamics of Macrosphum avenae was '凸' curve, models under high and medium N fertilizer were y=16.6515 e^0.199x and y=10.752e^0.201x respectively before May 3(grouting of grain phase).And after May 3,models were y=1156432e^-0.1977x and y=6545913e^-0.2233x respectively.These results would be applied for forecasting on population danamics of Schizaphis graminum and Macrosiphum avenae.