在马铃薯生产上，造成减产、品质下降的最主要原因是种薯感染病毒，引起生理机能退化。在多年生产技术研究中，还发现如采取的栽培措施不当，就地繁种也能引起种薯生理退化，造成种薯质量下降，即使是本重新感染病毒的脱毒薯种，高产的优良性状在一定的使用年限内也会迅速减退 In potato production, resulting in reduced production, the decline in quality is the main reason for the virus infected seed, causing the deterioration of physiological function. In many years of production technology research, it was also found that if cultivation measures taken improperly, local species can also cause physiological degradation of seed, resulting in the quality of seed, even if the re-infected virus virus-free potato varieties, high yield of fine traits In a certain period of service will quickly decline