| 玉米瘤黑粉病空间分布型研究 |
| |
| 引用本文： | 段显德.玉米瘤黑粉病空间分布型研究[J].河南农业科学,2010(6). |
| |
| 作者姓名： | 段显德 |
| |
| 作者单位： | 辽东学院,农学院,辽宁,丹东118003 |
| |
| 摘 要： | 对玉米瘤黑粉病空间分布型进行了研究,结果表明:玉米瘤黑粉病在病株率低于4%的条件下,空间分布型基本为随机分布;病株率在10%左右,空间分布型仍为随机分布,但有均匀分布趋势。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:若想获得一般精确的调查结果,在病株率达到1%左右时,大约需要调查285个样本;在病株率达到5%左右时,大约需要调查135个样本;在病株率达到10%以上时,大约需要调查115个样本。
|
| 关 键 词： | 玉米 瘤黑粉病 空间分布型 理论抽样数 |
Primary Study on Spatial Distribution of Corn Lump Smut |
| |
| DUAN Xian-de.Primary Study on Spatial Distribution of Corn Lump Smut[J].Journal of Henan Agricultural Sciences,2010(6). |
| |
| Authors: | DUAN Xian-de |
| |
| Abstract: | The spatial distribution of Ustilago maydis in maize was studied.The results were showed as follows: when the percentage of diseased maize was under 4% as well as around 10% it displayed random distribution combined with uniform distribution tendency.The optimum sampling number in different disease severity was determined according to the regression equation of average congestion degree and density.In order to obtain relatively accurate survey results when the diseased rate reached to 1%,5% and 10%,respectively,the required sample number was 285,135 and 115 correspondingly. |
| |
| Keywords: | Maize Sommon smut Spatial distribution Optimum sampling number |
| 本文献已被 万方数据 等数据库收录！ |
|
