Spring apples before this flower

Some apple parks tend to focus only on pest control and disease prevention after fruiting, while neglecting pre-flowering management during the golden season. In fact, Apple's spring management is a critical period for improving apple production and quality.

Pest control is the key. Early spring is a critical period for the prevention and control of apple pests and diseases. The first step is to scrape bark rot lesions, ring vein lesions and old cracks, clean up the orchards, control the development of the disease, reduce the density of the wormholes, and then apply wound protection agents. Spray a 3–5 bymide lime sulfur agent before and after pruning; in a seriously rotted orchard, spray 40% methine WP 100-200 times; apple anthrax serious orchard , spraying pentachlorophenol sodium 50 times -100 times the liquid; lobular disease serious orchard spraying 5% zinc sulfate solution.

Fertilizer should meet nutrient needs. The application of chemical fertilizers on the basis of applying organic fertilizers to meet the needs of nutrients for flowering, fruit setting and shoot growth of fruit trees. The amount of topdressing depends on the soil, tree vigor, age, and yield. Generally, the young saplings on fertile soil do not top-dress, and the weak saplings on thin soils may be top-dressed. The general initial result tree is 0.5-1 kg of ammonium sulfate or 25-30 kg of human fecal urine. Fruit trees, each 1.5–2 kg of ammonium sulfate or 50–100 kg of human excrement, and if applicable, additional phosphorus and potassium fertilizer, 2.5–5 kg of calcium superphosphate per plant and 5-10 kg of plant ash. . In this way, not only can the yield be raised, but also the fruit quality can be improved and the tree vigor can be increased. In the middle to late March and early April, watering is combined with topdressing. Because the temperature is still low at this time, the amount of irrigation should not be too large, so as not to reduce the soil temperature, affecting the root development. For an orchard that had not been filled with frozen water the previous year, it should be watered in time to facilitate the germination, flowering and fruit setting of the fruit trees.

Cut in time before flowering. Before the flowers are cut, it is an effective measure to correct winter shear errors and compensate for the destruction of the original winter cut tree shape due to climate and mechanical damage. This measure can adjust the proportion of flower buds and leaf buds and coordinate the relationship between growth and results. For the juvenile trees that have just resulted, the flower buds should be kept as much as possible to alleviate the vegetative growth; for the young trees of the fruit period, flower buds should also be retained to obtain a certain amount of yield; for the full-fruit trees, the new year trees should be The ratio of flower buds and leaf buds is 1:3-1:2, and strict control of flower bud retention. The unbalanced force of each branch and branch can be adjusted by the difference in the amount of preserved flowers. The strong ones should spend more time on flowers and the weaker ones should spend less time on flowers. It should be noted that the apple flowering season often encounters the hazards of low temperatures, high winds, and late frosts, affecting normal pollination and fruit setting. Flower buds should be left as much as possible until the fruit set is established.

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