Xiao Guoguang.
(2) Site conditions.
The elevation of the reserve is 300m to 650m, the soil type is mainly cinnamon soil, the soil texture is mainly sandy loam, the soil organic matter content is ≥0.8, the soil pH value is 6.5 to 7.5, and the soil thickness is above 80cm.
(3) Cultivation management.
1. Seedling raising: Begonia octagonal is used as rootstock, and scions are collected from excellent mother plants with strong growth and grafted to propagate seedlings.
2. Planting:
(1) Planting time: The planting time is in the first half of April.
(2) Planting density: ≤840 plants/hectare.
(3) Fertilization: organic fertilizer is the main fertilizer, and it is ≥ 22,500 kg per hectare every year.
3. Plastic pruning: combine winter pruning with summer pruning to ensure ventilation and light transmission of trees, and keep the total number of branches per hectare ≤1.2000.
4. Flower and fruit management: the yield per hectare is ≤ 37,500 kg.
5. Environmental and safety requirements: The use of pesticides and fertilizers must comply with the relevant provisions of the state and must not pollute the environment.
(4) harvesting.
The harvest time is 65438+1mid-to-late October. 1, sensory characteristics: smooth and clean fruit surface, bright color, yellow and white flesh, crisp quality, rich juice, sweet and sour taste.
2. Physical and chemical indexes: soluble solids ≥ 12.0, titratable acid ≤0.57, solid-acid ratio ≥2 1.05, and fruit surface coloring rate ≥80%.
3. Safety requirements: product safety indicators must comply with the relevant national regulations on similar products.
Apple varieties, also known as Xiao Guoguang and Wanshou. Native to the United States, accidental seedlings were discovered in 1600, and introduced to Japan in 1872. It was introduced to China in about 1905, and by 1980, Guoguang apple planting in Beijing had accounted for 50-60% of the total apple planting area. It was not until the introduction of red Fuji varieties that the cultivation area of Guoguang decreased year by year.
Guoguang apple is a medium-sized apple, with average single fruit weight 150g and maximum fruit weight of 240g. The fruit is oblate, neat in size, with a yellow-green background and numerous fruits. The flesh is white or light yellow, crisp, thin, juicy and sweet. This variety has strong adaptability and stress resistance. But the fruit is late, sour, small and bad in color. After storage, the sweet and sour taste is moderate, but there is fruit cracking.