| 白菜霜霉病及软腐病空间分布型研究 |
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| 引用本文： | 段显德,马海霞,杨信东.白菜霜霉病及软腐病空间分布型研究[J].吉林农业大学学报,2010,32(2):130-135. |
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| 作者姓名： | 段显德 马海霞 杨信东 |
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| 作者单位： | 1. 吉林农业大学农学院,长春,130118;辽东学院农学院,丹东,118003
2. 吉林农业大学农学院,长春,130118 |
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| 基金项目： | 国家自然科学基金项目(30600003) |
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| 摘 要： | 对白菜霜霉病及软腐病的空间分布型进行了研究。结果表明:白菜霜霉病在单株病斑数20的15个地块中均为聚集分布,且随着单株病斑数的增多,聚集程度逐渐减小;在单株病斑数3 000的4个地块中为均匀分布。在病株率30%的地块中,白菜软腐病多为随机分布,但由于局部地势低洼等原因也会导致集聚分布;在病株率30%的地块中,白菜软腐病多为随机分布,但有接近均匀分布的趋势。根据平均拥挤度和平均密度关系回归方程,得到2种病害在不同发病程度下的理论抽样数。
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| 关 键 词： | 白菜 霜霉病 软腐病 空间分布型 理论抽样数 |
| 收稿时间： | 2010-09-24 |
| 修稿时间： | 2009-04-16 |
Primary Study on Spatial Distribution Pattern of Chinese Cabbage Downy Mildew and Soft Rot |
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| DUAN Xian-de,MA Hai-xia,YANG Xin-dong.College of Agronomy,Jilin Agricultural University,Changchun ,China,.College of Agriculture,Eastern Liaodong University,D,ong.Primary Study on Spatial Distribution Pattern of Chinese Cabbage Downy Mildew and Soft Rot[J].Journal of Jilin Agricultural University,2010,32(2):130-135. |
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| Authors: | DUAN Xian-de MA Hai-xia YANG Xin-dongCollege of Agronomy Jilin Agricultural University Changchun China College of Agriculture Eastern Liaodong University D ong |
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| Institution: | 1. College of Agronomy, Jilin Agricultural University,Changchun 130118|China|2. College of Agriculture, Eastern Liaodong University, Dandong 118003,China |
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| Abstract: | The spatial distribution of Chinese cabbage downy mildew and soft rot was studied.The results showed that the distribution pattern of Chinese cabbage downy mildew was aggregation in 15 fields of which the number of lesion per plant was less than 20.And with the increase of lesion number,the aggregation degree decreased gradually.To the 4 fields of which the number of lesion per plant was more than 3 000, the distribution pattern was evenness.The distribution pattern of soft rot was mostly a random in those ... |
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| Keywords: | Chinese cabbage downy mildew soft rot spatial distribution pattern optimum sampling number |
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