玉米褐斑病空间分布型研究  

Spatial Distribution Pattern of Corn Brown Spot

作　　者：段显德[1] 王晓梅[2] 马腾达[2] 杨信东[2] 

机构地区：[1]辽东学院农学院,辽宁丹东118003 [2]吉林农业大学农学院,长春130118

出　　处：《辽东学院学报（自然科学版）》2011年第4期290-291,302,共3页Journal of Eastern Liaoning University:Natural Science Edition

基　　金：国家自然科学基金项目(30600003)

摘　　要：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。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.

关 键 词：玉米 褐斑病 空间分布型 理论抽样数 

分 类 号：S435.131.4[农业科学—农业昆虫与害虫防治]