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本观察结果,早稻田杂草萌发总量为380株/m~2,总萌发量随水稻生育进程而下降,其下降动态的回归方程式为:Y=87.6981-1.1585X±11.3142(r_(cy)=0.8422 p<0.05);各类杂草随水稻生育进程的萌发动态,各有其色,如稗草为幂函数曲线Y=4242.5530X~(-2.2223)±0.1412,而节节草为S形曲线Y=37.8/1+e~(5.2522-0.1502X)±0.8819。研究早稻杂草萌发动态,为有效合理除草提供科学依据。
The results showed that the total amount of weeds germinated in the early rice fields was 380 plants / m ~ 2, and the total germination rate decreased with the growth of rice. The regression equation of the decline was Y = 87.6981-1.1585X ± 11.3142 (r cy = 0.8422, p <0.05). The weed species varied with the germination dynamics of rice during their reproductive process. For example, barnyard grass showed a power function curve Y = 4242.5530X ~ (-2.2223) ± 0.1412, Y = 37.8 / 1 + e ~ (5.2522-0.1502X) ± 0.8819. Study on early weed germination dynamics, in order to provide a scientific basis for effective and reasonable weeding.