| 苗圃毛白杨由锈病引起的生长量损失估计 |
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| 引用本文： | 曾大鹏,杨鹤安,王昕,束永志,李浙华.苗圃毛白杨由锈病引起的生长量损失估计[J].植物保护学报,1988,15(3):195-199. |
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| 作者姓名： | 曾大鹏 杨鹤安 王昕 束永志 李浙华 |
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| 作者单位： | 中国林业科学院，中国林业科学院，北京市园林科学研究所，北京市园林局绿化处，北京市东北旺苗圃 |
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| 摘 要： | 1983—1985年,通过定株系统观测,对毛白杨幼苗由锈病造成的生长量损失做了数理分析,提出3个数学模型,可试用于计算不同病情(x)对单株胸径增长量(y)的影响,并可做为研究防治苗圃锈病的经济效益和防治指标的参考。用于1年生养干苗的模型为:y_1=0.2998e~(-0.08481x) 用于2年生养干苗的模型为:y_2=0.4208e~(-0.0457x2) 用于3年生养干苗的模型为:y_3=0.7913e~(-1.0282x3)
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STUDY ON GROWING LOSSES OF POPULUS TOMENTOSA GAUSED BY LEAF RUST IN NURSERY |
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| Zeng Dapeng,Yang Hean,Wang Xing,Su Yongzhi and Li Zhehua.STUDY ON GROWING LOSSES OF POPULUS TOMENTOSA GAUSED BY LEAF RUST IN NURSERY[J].Acta Phytophylacica Sinica,1988,15(3):195-199. |
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| Authors: | Zeng Dapeng Yang Hean Wang Xing Su Yongzhi and Li Zhehua |
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| Institution: | Forest Research Institute, Chinese Academy of Forestry,Forest Research Institute, Chinese Academy of Forestry,Scientific Research Institute of Gardening, Beijing,Division of Afforestation, Bureau of Gardening, Beijing and Dongbeiwang forest nursery of Beijing Municipality |
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| Abstract: | During 1983-1985,the estimation of growing losses of Populus tomentosa caused by leaf rust in nursery were carried out. Different levels of diseases severity(X) established by spraying fungicide and chest diameter(Y) of young popular trees were investigated.The data obtained were studied by regression analysis. Three holistic models were put forward:(1) The model was used for poplar trees, which had been planted for one year:Y1=0.2988e-0.0848x1(2)The model was used for poplar trees, which had been planted for two years:Y2=0.4208e-0.0457x2(3)The model was used for poplar trees, which had been planted for three years:Y3=0.7913e-0.0282x3 It is believed that the three equations be beneficial in the disease loss assessment and making disease control management. |
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