| 邱书志;蔡斌.云杉落针病防治指标的研究[J].植物保护,2005,31(6):58-62. |
| 云杉落针病防治指标的研究 |
| Study on the control indices of spruce needle cast |
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| DOI： |
| 中文关键词: 植物病虫害测报云杉落针病 损失率 防治指标 |
| 英文关键词:forecasting of plant disease and pest pine needle dropping disease loss proprotion control index |
| 基金项目: |
| 邱书志;蔡斌 |
| 甘肃白龙江林业管理局林业科学研究所 甘肃兰州730050 |
| 摘要点击次数: 678 |
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| 中文摘要: |
| 对甘肃白龙江林区人工云杉林落针病发生严重地区,采用均匀典型整群抽样法调查40块样地,分不同病级进行树干解析40株,利用计算机辅助设计计算,获得了病级与树高、胸径、材积平均生长量、损失量和损失率的关系,各病情指数与材积损失量、损失率的相关关系。从病害群体的角度推导出云杉落针病材积损失率估测模型,建立了经济危害允许水平、防治指标的估测模型,确定经济危害最高稳定阈值,以及与其对应的材积损失率。模型预测准确,精度高。 |
| 英文摘要: |
| Forty plots of spruce lands with serious pine needle dropping disease were selected by even and typical principles in artificial forests of Bailongjiang.Forty strains at different degrees of disease severity were sectioned and analyzed.The relations between the disease severity and the height,the diameter, the average growth rate of log cubage,the total loss of log cubage and loss proportion were studied respectively.The indices of disease severity were correlated to both the total loss and loss proportion of log cubage.Based on the population levels of the disease,the evaluation models of the loss proportion of log cubage from pine needle dropping disease were established.The estimation based on the model was accurate. |
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