Study on Different Ridge Distance of Potato in Ridge Aboveground Cultivation Pattern

Aiming at the problems of low yield,low commodity rate and high rotten potato rate lied in traditional cultivation pattern in Heilongjiang province,the effect of different ridge distance on the potato late blight occurrence,yield,commodity rate,deformity potato rate and other related traits were studied using ridge aboveground cultivation pattern.The results showed that potato late blight occurred lighter when the ridge distance was 80 cm or more than 80 cm.The yield was highest with the 80 cm ridge distance.The commodity rate was the highest and the green-husk rate was the least with the 85 cm ridge distance,when the ridge distance was 90 cm the deformity potato rate was the lowest,the rotten potato rate was the least with the 80 cm ridge distance.So it suggested applying 80 cm ridge distance for the highest yield level and the least rotten potato rate.