枇杷 Proper use of bio-organic fertilizer

It is a subtropical evergreen fruit tree, which is stronger than citrus. The average annual temperature is above 12-15 °C, the winter is not lower than -6 °C, and the annual rainfall is more than 1000 mm. The shoots of the dragonfly have four peaks in one year, mainly spring shoots (February to April), summer shoots (5-June), autumn shoots (8-September), and winter shoots (11-December) It is mainly spring, summer and autumn. There is a clear alternation between the root activity of alfalfa and the growth of shoot shoots in the shoot. Generally, the roots grow about two weeks earlier than the shoot shoots.

The fertilization of young trees is based on the principle of thin application. From the planting to the germination, the first fertilizer was applied, and the seedlings applied 20 kg of bio-organic fertilizer. Fertilize once a month until October. In the second year and 2, 4, 6, 8, and 10 months, each fertilization was carried out once, and 40 kg per mu was applied.

Adult orchards usually apply three times a year. The first application of spring-fed fertilizer, applied in mid-February, mainly promotes spring shoots and enlarges the fruit. Spring shoots can become the base of the fruit branches and summer and autumn shoots of the year. This fertilization is more important. 50 kg of bio-organic fertilizer per mu, 10 kg of urea, 5 kg of superphosphate and 15 kg of potassium sulfate. The second application of summer-fed fertilizer is applied after picking fruit from mid-May to early June (the late-maturing variety is applied before harvesting). It mainly promotes summer shoots and promotes flower bud differentiation in July-August. The summer shoots are many and tidy. In the past, many of them could form the mother branches, and the promotion of summer shoots was the main measure to ensure the high yield of the year. Therefore, the amount of fertilizer applied was very large. Generally, 200 kg of bio-organic fertilizer is applied per mu, 50 kg of urea and 20 kg of superphosphate. The third application of autumn fertilizer or pre-flowering fertilizer, in the early September-October, before flowering before heading, mainly promotes good flowering, improves fruit set and increases cold-proof winter ability. 80 acres of bio-organic fertilizer.

The soil with good radiance is not as strong as other fruit trees, and the new roots are strong. Therefore, when fertilizing, care should be taken not to lose the fertilizer, and the roots of the cockroaches can be absorbed in time. Generally, the method of applying a hole or ditch is adopted. The hole application is to excavate 3-4 caves in the square or three sides about 1.5 meters from the main trunk, and the depth is 60-80 cm. Each time the liquid fertilizer is applied, it is poured into the cave, and the soil is covered with water to allow the fertilizer to slowly penetrate into the soil. It is also possible to use a method of applying a circular groove or a radial groove.

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