Anthocyanin of color potato was important as its nutritional value, but very little research had been conducted on the influence of cultivation techniques on anthocyanin content of potatoes. In this paper, orthogonal experimental design L 9(3 4) was used to investigate the effect of fertilizers and planting densities on anthocyanin content of color potatoes In different cultivation conditions. The results showed that to obtain the highest anthocyanin content in Ziyun No. 1, optimal cultivation techniques were as follow: at the condition of intercropping with orchard in the shallow valley, optimal average per hectare consumption of fertilizer nutrients was pure P 2O 5 100 kg, the most cost-effective plant density was 50 000 plants/hm 2, with 2 per mil spray concentration of KH 2PO 4; at the condition of individual cropping in the shallow valley, optimal average per hectare consumption of fertilizer nutrients was pure P 2O 5 75 kg, the most cost-effective plant density was 60 000 plants/hm 2, with a 3 per mil spray concentration of KH 2PO 4; at the condition of individual cropping in deep valley between low mountains areas, optimal average per hectare consumption of fertilizer nutrients was pure P 2O 5 100 kg, the most cost-effective plant density was 60 000 plant/hm 2, with 3 per mil spray concentration of KH 2PO 4.
