摘要
本研究明确了掖单１３号高产品种玉米霜霉病的病株率、病株结实率和产量损失率之间的相关关系。当病株率Ｘ＜１１．１３８４％时，病株结实率ｙ＝１５．２７４１－１．１３７３Ｘ，病株产量损失率（％）＝０．９２７２Ｘ＋０．００６５Ｘ２；当病株率Ｘ＝１１．１３８４％时，病株结实率（％）＝０；当病株率≥１１．１３８４％时，病株率等于产量损失率。在田间病株率较低的情况下，病株发病程度较轻，部分病抹上可以形成结实果穗，病株率与病株结实率之间呈负相关关系，即病株率愈高，病株结实率愈低，相关系数ｒ＝－０．９５９７，相关性达到极显著水平。
The result of study showed that there a relationship between rate of,diseasedplant,setting percentage of diseased plant and rate of impaired yield of the high yield cultivar,Yidan Mo.13.As the rate of diseased plant,x<ll.1384%,the setting percentageof diseased pland y-15.2741-1.1373x,the rate of impaired yield(% )=0.9272x+0.0065x2;As the rate of diseased plant,x= 11.1384%,the setting percentage of disasedplant(% )=0;As the rate of diseased plant>ll.1384%,the rate of diseased plantis equalto the rateof impaired yield.Under the condition of lower diseased degree as well as lowerrate of diseased plant in field,the partial diseased plants can form setting maize ear, therelation between the rate of diseased plant and the setting percentage of diseased plant wasnegative correlation,that is,as the rate of diseased plant is higher, the setting percentageof diseased plant is lower,the correlation coeficient,r=0.9597* *,the relativityachieves extreme significance level.
出处
《宁夏农学院学报》
1996年第3期1-4,共4页
Journal of Ningxia Agricultural College
关键词
掖单13号
玉米霜霉病
病株率
损失率
Yidan No.13 maize downy mildewrate of diseased plant rate of impaired yield
