| 杨树溃疡病流行与土壤条件的关系 |
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| 引用本文： | 曹支敏,景耀,周芳.杨树溃疡病流行与土壤条件的关系[J].西北林学院学报,1991(2). |
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| 作者姓名： | 曹支敏 景耀 周芳 |
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| 作者单位： | 西北林学院森林资源保护系
(曹支敏，景耀)，西北林学院基础课部(周芳) |
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| 基金项目： | 林业部七·五攻关项目(75-07-04-09-04)子课题 |
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| 摘 要： | 土壤条件对箭杆杨溃疡病的流行与抗病性及发病程度具有明显影响。40～60cm深层土壤中的速效P与病情指数是显著正相关,pH与病情指数呈负相关。树皮中全P含量与该层土壤速效P含量及感病指数均具有显著的正相关性。通径分析指出,该层土壤的速效P及其pH对病情指数产生正效应;而全N、速效K对病情指数产生负效应。它们的效应大小依次为:P>K>N>pH。
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| 关 键 词： | 箭杆杨 溃疡病 流行规律 土壤因素 |
Relationship Between the Epidemic of Poplar Canker and Soil Condition |
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| Cao Zhimin Jing Yao.Relationship Between the Epidemic of Poplar Canker and Soil Condition[J].Journal of Northwest Forestry University,1991(2). |
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| Authors: | Cao Zhimin Jing Yao |
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| Institution: | Cao Zhimin Jing Yao(Dept. of Forest Resource Conservation)Zhou Fang(Dept. of Basic Courses) |
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| Abstract: | Soil condition affects the epidemic of Dothiorella gregaria Sacc. severely in that a positive correlation was found between the available phosphorus in 41~60cm depth of soil and disease index of the canker , while a negative correlation was found between pH of the soil layer and the disease index. Phosphorus content of the poplar bark was correlated positively with both the disease index and the available P in the soil layer. The available P and pH of the soil layer showed positive effect on the canker whereas the total nitrogen and the available potassium of the soil layer showed negative effect as revealed by path analysis. The order of effect is: P>K>N>pH . |
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| Keywords: | Populus usbekistanica Kom cv Afghauica canker epidemic soil factor |
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