二季作地区马铃薯脱毒种薯繁育体系的研究

天津处于我国马铃薯种性严重退化的二季作地区.针对我市马铃薯病毒病,结合二季作地区留种技术,采用早熟优种红纹白、丰收白进行脱毒种薯生产.试验中将塑料大棚生产技术,地膜覆盖技术用于脱毒种薯生产,达到了早收、防蚜目的.并结合二季作地区秋播留种,完成了天津市三年六代的马铃薯脱毒种薯的繁育体系.各级种薯达到了国内暂行规定标准.

A STUDY ON THE PROPAGATING SYSTEM OF VIRUS-FREE POTATO SEED TUBERS IN DOUBLE CROPPING POTATO REGION

Though Tianjin is in the region of double cropping potatoes, the varietal deterioration of potato seed tubers is very serious. In order to control the damage by potato viruses in our area, we have produced the virus-free potato seed tubers with the local propagating method and by selecting early mature and high yield varieties. "Hong Wen Bai" and "Feng Shou Bai" During the production test, polythene film covered sheds and ground film covering technique were adopted and succeeded in protecting the crop from the damage by aphids and having an earlier harvest.The propagating system of virus-free potato tubers for 6 generations in 3 years hereby has been established in Tianjin. The potato seed tubers of each degree have reached the temperary national standards respectively.