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水稻白叶枯病的产量损失是病情函数。病情与产量损失之间存在错综复杂的关系,反应出农业生态系统中植病系统在环境条件和人类干预下,寄主-病原相互作用和相互适应结果,可行成不同的病情与产量损失组合。我们采取三种病情与产量损失估计方法进行相应的调查研究:(一)稻白叶枯病病情与产量损失宏观定性分级定量估计损失法;(二)病情按严重度分级,抽样测定单株产量与损失率,再估计全田或地区产量损失;(三)多年多点稻白
Yield loss of rice bacterial blight is a function of disease. There is a complex relationship between disease status and yield loss, which reflects the host-pathogen interaction and mutual adaptation of phytopathogenic system in agricultural ecosystem under different environmental conditions and human interventions. It is feasible to combine different disease states and yield losses. We take three disease and yield loss estimation methods to conduct the corresponding investigation: (a) the disease severity and yield loss of rice qualitative and quantitative macro-quantitative assessment of loss method; (b) the disease severity grading, sampling to determine the yield per plant And the loss rate, and then re-estimate the loss of production in the whole field or region; (3) more rice for many years