摘要
采用通径分析方法研究了水稻穗期受三化螟为害后的螟害结构及其对产量损失的影响。白穗株率,隐害株率和半白穗株率对产量损失率的直接通径系数分别为0.8778、0.0723和0.0882。决定系数达0.9971,说明剩余因素对产量损失的影响仅为0.29％,从而使通径分析的结果表达了螟害与产量损失的真实关系。
The damage caused by paddy stem borer in the rice earing stage are white ear,concealing plant and half white ear etc.They made yield loss in different degrees.In this study,we employed the method of path coefficient to analyse the damage caused by the paddy stem borers in the rice earing stage.The results showed that the direct path coefficient of the white ear,the concealing plant and the half white ear attained 0.8778, 0.0723 and 0.0882 respectively.On the other hand,the determinative coef- ficient was 0.9971.The determinative coefficient showed that rice yield loss resulted from the surplus factor was only 0.29％.Thus,the result of the path coefficient conveyed the real relationship between the damage of paddy stem borer to yield loss.
关键词
水稻
穗期
三化螟
为害
产量影响
paddy stem borer
yield loss
path coefficient
