| 辽宁西部地区苹果树皮含钾量与腐烂病发生关系和矫治效果 |
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| 引用本文： | 王金友,李美娜,张萍,乔壮.辽宁西部地区苹果树皮含钾量与腐烂病发生关系和矫治效果[J].植物保护学报,1998,25(1):61-64. |
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| 作者姓名： | 王金友 李美娜 张萍 乔壮 |
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| 作者单位： | 中国农业科学院果树研究所，中国农业科学院果树研究所，中国农业科学院果树研究所，中国农业科学院果树研究所 兴城 125100，兴城 125100，兴城 125100，兴城 125100 |
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| 摘 要： | 在辽西地区国光苹果大树园，完善腐烂病树病情分级标准，适当增加样本数，将生长期叶分枝改为春季发芽前树皮分析，研究发现，树皮中含钾量与腐烂病发生程度之间呈极显著负相关，经初步验证，结果一致，矫治试验结果表明，春季增施钾肥，可提高树皮含钾量并减轻腐烂病发生程度。
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| 关 键 词： | 苹果树 腐烂病 钾 相关性 防治 |
CORRELATION BETWEEN POTASSIUM CONTENT IN APPLE BARK IN THE SPRING AND THE OCCURRENCE OF VALSA CANKER |
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| Wang Jinyou,Li Mein,Zhang Ping and Qiao Zhuang.CORRELATION BETWEEN POTASSIUM CONTENT IN APPLE BARK IN THE SPRING AND THE OCCURRENCE OF VALSA CANKER[J].Acta Phytophylacica Sinica,1998,25(1):61-64. |
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| Authors: | Wang Jinyou Li Mein Zhang Ping and Qiao Zhuang |
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| Institution: | CORRELATION
BETWEEN POTASSIUM CONTENT IN APPLE BARK;IN THE
SPRING AND THE OCCURRENCE OF VALSA CANKER;Wang
Jinyou Li Meina Zhang Ping Qiao Zhuang;(Institute
of Pomology, Chinese Academy of Agricultural Sciences, Xingcheng) |
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| Abstract: | It was revealed in an extensive survey that the occurrence of apple Valsa canker (Valsa ceratosperma) is correlated negatively with potassium content in bark. The method of disease rating was modified. The assay of potassium content in leaf in growing season was changed to that in bark before budding in early spring. Bark sampling for potassium assay was increased to a considerable amount. A critical level of potassium content of 0. 505% in 'strong tree' was suggested and was confirmed through field experiment. The application of potassium fertilizer resulted in the increase of bark potassium content and the disease resistance of apple trees was strengthened significant-
ly. |
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| Keywords: | Valsa ceratosperma potassium content in bark correlation disease man-agement |
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