The scientific name "I don't know fire" is also called "convex orange", "ugly orange" and "ugly monster" It was bred in the experimental field of horticulture in Japan's Ministry of Agriculture and Water Resources by crossing with Nakano 3 Ponkan 1972. It was first planted in Pujiang County, Sichuan Province in 2000. In 2003, the fruit yield per plant in Pujiang County was more than 5 kg, with the highest 15 kg. In 2003 alone, the number of tourists in Pujiang exceeded 65,438+0,000. Later, Jintang, Dan Ling and other counties in Sichuan were gradually introduced, and other places in Sichuan, such as Neijiang, Chongqing, Yunnan, Jiangxi, Hunan and Zhejiang, were also planted locally. After grafting with high grafting technology, the fruit of Huhuoza is larger in the western Sichuan basin, with an average single fruit weight of 200 grams and a maximum of more than 400 grams. Fruit obovate, mostly with prominent short neck; The pericarp is yellow-orange, and it begins to be colored in the first ten days of 10, and it is completely colored in the first ten days of 12. The peel is yellow and orange, the fruit surface is slightly thick and easy to peel. The sugar content of fruit juice is above 13%, and the highest is 17%, which is very sweet. Mature in February and March of the following year, with excellent flavor.

Second, planting techniques

1) Orchard Planning

It is required that the soil layer is deep (60㎝) and fertile; The ph value of the soil is 5.5-7.0; The slope of the orchard is less than 25 degrees. When planning a garden, there should be necessary roads, irrigation and drainage, water storage and ancillary building facilities. In terms of specific planning, we should concentrate on one place as much as possible and build gardens in places with good traffic and water conditions.

2) Planting time and planting technology

1, time. Generally, it is planted after the autumn bamboo shoots mature in September-165438+10 or before the spring bamboo shoots germinate in February-March. 2. Density. The planting density on the flat land is 3m× 4m, with 55-60 plants per mu. Stepped terrain planting, the density is 2.5× 3m row spacing, and 80 plants per mu are suitable. 3. Planting techniques. Digging planting holes in the soil: pulling wires at regular intervals, digging planting holes with a depth of 80cm and a width of 80cm, then pressing green manure with a depth of 50cm, and backfilling the soil with a height of 40cm for planting; Ridge planting: 8 meters, 60-80㎝ wide and 40-60cm deep, with 2 ridges per grid (width 1.5m, center distance 4m, height 20-30cm). When planting, the roots of seedlings should be trimmed appropriately, placed in the center of the planting hole, stretched and righted, and the seedlings should be gently lifted upward while filling the soil, so that the roots are closely connected with the soil. Water the roots, make a 1m tree tray around the seedlings, and cover it with chaff.