CAJ | 학술논문

对玉米褐斑病的空间分布型进行研究，结果表明：在发病中后期褐斑病在病株率为31％～34％的地块中，空间分布为随机分布；在病株率为45．2％～84．6％的地块中，空间分布均为均匀分布。根据平均拥挤度和平均密度关系回归方程，得到病害在不同发病程度下的理论抽样数。若想得到精确的调查结果，在病株率达到5％左右时，大约需要调查325个样本；在病株率达到10％以上时，大约需要调查160个样本。
대옥미갈반병적공간분포형진행연구，결과표명：재발병중후기갈반병재병주솔위31％～34％적지괴중，공간분포위수궤분포；재병주솔위45．2％～84．6％적지괴중，공간분포균위균균분포。근거평균옹제도화평균밀도관계회귀방정，득도병해재불동발병정도하적이론추양수。약상득도정학적조사결과，재병주솔체도5％좌우시，대약수요조사325개양본；재병주솔체도10％이상시，대약수요조사160개양본。
The spatial distribution of Physoderma maydis Miyabe in maize was studied. The results showed that brown spot was random distributed in fields with 31% -44% diseased plants and uniform distributed in fields with 45.2% -84.6% diseased plants. The optimum sampling number in different disease seventy was determined according to the regression equation of average congestion degree and density. It was found that to obtain accurate survey results, 325 and 160 samples are required for fields with about 5% and 10% diseased plants, respectively.