小麦赤霉病的为害损失估计模型

LOSS ASSESSMENT MODELS OF YIELD AND QUALITY CAUSED BY FUSARIUM HEAD BLIGHT

以4年对不同小麦品种的赤霉病为害损失结构的研究为基础,用950个数据构建了小麦赤霉病的产量、质量损失模型。结果表明,单穗粒重损失率是唯一完全的、最佳的产量损失指标,千粒重损失率是粗略的产量损失估计指标。病粒率是品质损失的最佳指标,用其可完整地表征赤霉病的产量、质量损失。以所建模型对关中麦区、黄淮麦区、长江中下游麦区及黑龙江春麦区的赤霉病资料进行验证,结果表明,所建模型预测效果好、精度高、适用性强,可适用于关中及类似麦区。

The loss models of yield and quality were constructed based on loss composition of yield and quality cased by wheat scab in different wheat cultivars with data collected in 4 years. The results showed that loss rate of kernel weight per spike was the only and the most suitable index for assessing yield loss while that of 1000 kernel weight as rough index. The diseased kernel rate was an optimum index for quality loss. These indexes were stable and could describe the yield and the quality loss caused by scab. The data on wheat scab obtained from Guanzhong in Shaanxi Province, Huanghe-Huaihe Basin, Yangtze River Valley and Heilongjiang Province were used to check the models. The result showed that the models were effective, accurate and applicable. The models will be applied to wheat growth area of Guanzhong and other wheat growth areas.