Characteristics of growth and development and performance of yield and quality for winter-planting potato in different cultivation models.

Zihua851,which is a leading variety of winter-planting potato in Fujian,was used to study the difference in the characteristics of growth and development and performance of yield and quality of the variety in five cultivation models.The results showed that these models with covering all increased the yield.As far as yield is concerned,the tillage with straw covering and plastic film mulching was the best,then followed by the tillage with plastic film and straw covering mulching,the tillage with plastic film mulching,and the tillage with straw covering.For all treatments,the high yield advantage was due to high number of potato and partition coefficient of biomass.Moreover,all treatments had significant influence on the content of soluble starch,reducing sugar,vitamin C,protein,marketable potato rate,number of microorganism population,but had little effect on the dry matter of tuber and flour yield.Different cultivation models have merits and demerits respectively,so in order to get high yield,relevant cultivation model should be employed to various environmental conditions.