Study On Technoligy System Of High Yield And High Value Of Spring Potato (Solanum Tuberosum L.) In Taixing Region

Six potato varieties: Netherlands-15,dongnong-303jinguan,kexin-4,luyin-l and kexin-1 were employed in this research for the comparing of bearing period, plant character and economic yield. Kexin-4 was employed for studying the effect on yield of different sowing time and protecting equipment. Kexinl was employed for studying the effect on yield and quality of different quantity of kalium fertilizer.Jinyin8 was employed for studying the effect on yield and different harvesting period. The benefit of interplanting-cultivation model of kexinl and kaixing sweet-smelling dasheen also was analyzed. The results indicate that prematurity varieties such as dongnong303,luyinl cultivar et al. is more adaptable to cultivating in taixing region, but the middle- or late-maturity variety such as kexinl has been eliminated gradually. Advancing breeding period properly and using double-plastic film to cover can led to positive domino effect obviously on nutrition growth of potato. It can promote expanding of underground tuber and shorten maturity period and enhance the yield of potato. The sowing time is available of in Jan 20 for double-plastic film covering, while single-plastic film covering in Feb 11 ,and the plastic film should be ridge in field. The using of kalium fertilizer can promote plant height and total biologic yield , increase the economic yield, advance the distributing efficiency of nutrition and promote expanding of underground tuber. But excessive kalium also bring on some negative effect. Kalium fertilizer can promote the content of amylum, but the content of Vc has a pulsing pattern of reducing-increasing-reducing. The available quantity of kalium is between 15-20 kg/667m~2 for spring potato in Taixing region. With putting off the harvesting time, the economic yield increased continuously, and got it's peak of yield at May 25, then keeping unchanged, but it's economic benefit has a changing pattern of increase-reducing. So the best harvesting time of spring potato in Taixing region is May 22. The interplanting-cultivation model of spring potato and sweet-smelling dasheen can increase the economic benefit.