Where is the latest production area of Red Fuji apples?

Red Fuji apples originated in southeastern Europe, the Turkey and Caucasus region, and were first introduced to Shandong, China around 1870. Zhucheng City began introducing and propagating Red Fuji apples in 1982, introducing a total of five strains: Nagafu 1, Nagafu 2, Nagafu 6, Akifu 1, and Iwafu 10, becoming one of the earlier counties and cities in Shandong Province to develop Red Fuji apple production. In recent years, they have been widely cultivated in Liaoning and the provinces of North China and Northwest China.

China began introducing Fuji apples in 1966. In the spring of 1980, when the Ministry of Agriculture organized relevant experts to visit Japan for investigation, they selectively introduced saplings and scions of several well-colored Fuji strains such as Nagafu 2, Akifu 1, and Nagafu 6, and arranged for systematic observation and research at multiple trial sites in major apple production areas. Today, Fuji strain apples have been developed across nearly one million hectares in China, and in Liaoning, Shandong, Hebei, Beijing, Shanxi, Shaanxi, Tianjin, Henan, Jiangsu, Anhui, Gansu and other provinces and cities, they have all replaced the late-maturing variety Guoguang.

Red Fuji has weak cold resistance, noticeably lower than varieties such as Guoguang, Shouhong, and New Jonagold. Frost damage and young tree shoot shriveling often occur in Liaoning, Hebei, Shandong and other places. In poorly drained and acidic soil, branch ring rot and rough bark disease occur severely. In addition, in high-temperature and high-humidity areas, ring-shaped cracking easily occurs at the fruit stem cavity. It is suitable for promotion north of the Lixiahe high plain area of Jiangsu Province at around 33°N and south of Zhuanghe County - Gaixian - Xingcheng City - Jianchang County in Liaoning at around 40°N, and east of the Qingyang, Tianshui, and Pingliang areas of Gansu Province. The old course of the Yellow River area is an economic cultivation zone for Fuji apples. Suitable soil is sandy loam, requiring deep soil layers, generally preferably more than 80 cm, with soil organic matter content above 2%.