论文部分内容阅读
根据棉叶螨在石河子垦区棉田的年发生程度与当年4～8月气温、降雨量之间关系的研究及历史资料分析，明确了4～6月≥0C积温和4～8月总降雨量是影响棉叶螨在本年发生程度的重要因子。用这两个预报因子，建立了棉叶螨年发生程度的中期预报数学模型：y＝－3．805＋0005X1－0．0129X2±0．776，经验证预报准确率可达93.8％。
According to the research on the relationship between annual occurrence of cotton spider mites and the temperature and rainfall in April and August of that year in the Shihezi reclamation area and the historical data analysis, it is clear that the accumulated temperature ≥0C and the total rainfall from April to August are Affect the cotton spider mites in the degree of occurrence of this important factor. Using these two forecasting factors, the mathematic model of mid-term forecast of the annual occurrence rate of cotton spider mites was established: y = -3.805 + 0005X1-0.0129X2 ± 0.776, and the prediction accuracy of the prediction was 93.8%.