摘要
依据田阳县2002-2012年水稻纹枯病观测田的病情系统调查记载表数据,采用分层随机抽样法抽取100对数据,构建了病情指数y与病株率x数学预测模型y=0.2919x-0.1478(%,0<x<20),应用于预测预报时可减少调查工作量,提高工作效率。
Based on field observation data during 2002-2012 in Tianyang County, the relationship between disease index of rice sheath blight and diseased plants rate were studied. The mathematical model of y=0.2919x-0.1478（%, 0〈x〈20）was constructed according 100 pairs of data which were sampled by delaminated random sampling method. Its application in forecasting was beneficial for reducing the workload and improving work efficiency.
出处
《广西农学报》
2013年第4期23-26,共4页
Journal of Guangxi Agriculture
关键词
水稻纹枯病
病情指数
病株率
数学模型
Rice sheath blight
disease index
diseased plant rate
mathematical model
