关键词: 消化系统, 消化系统

Abstract: In the experiment, potato variety ‘Netherlands No.7’ was used to study the difference in the characteristics of growth and development, yield and quality of winter-planting potato of the variety in seven cultivation models. The results showed that compared with the control, these models with covering could make potato emergence earlier more than 5 days, the growth period shortened by 8 days to 22 days, leaf growth promoted, the tuber number and yield improved by 29.04% to 67.68%. As far as yield was concerned, the tillage with straw covering and plastic film mulching was the best, then followed by the black plastic mulching, the tillage with straw covering and soil covering, the tillage with straw covering and black plastic film mulching, plastic film mulching, straw covering. Moreover, all treatments had significant influence on the dry matter of tuber, reducing sugar, the content of soluble starch and commercial potato rate. 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.