Hawthorn fertilization period mainly includes basal fertilizer, top-dressing at flowering stage, top-dressing at fruit enlargement stage, and top-dressing at fruit enlargement stage.
Base fertilizer application. It is better to carry out timely after fruit picking in late autumn, which can promote the absorption and accumulation of nutrients in the tree, which is conducive to the differentiation of flower buds. The application of basal fertilizer is preferably based on organic fertilizer, with a certain amount of chemical fertilizer. The amount of chemical fertilizer is: the nitrogen fertilizer used as base fertilizer generally accounts for about half of the annual application amount, which is equivalent to the application of urea 0.25 kg to 1.0 kg or ammonium bicarbonate 0.7 kg to 5.0 kg; phosphate fertilizer is mainly used as the main Base fertilizer, which accounts for about 80% of the annual application amount, corresponds to the application of 1.0 to 5.0 kg of superphosphate containing 16% of phosphorus pentoxide. The amount of potash used in the basal fertilizer is generally 0.25 kg to 2.0 kg of potassium sulfate or 0.25 kg to 1.5 kg of potassium chloride. The application amount is determined based on the size of the fruit tree and the yield of the hawthorn. Open 20 cm to 40 cm of the ditch, pay attention to not too close to the tree, the first chemical fertilizer and organic fertilizer or soil to be mixed properly after the application into the ditch, so as not to burn roots.
Flowering fertilizer. The nitrogen fertilizer is the main type, which is generally about 25% of the annual application amount, which is equivalent to 0.1 kg to 0.5 kg of urea per application or 0.3 kg to 1.3 kg of ammonium hydrogen carbonate per plant. According to the actual situation can also be appropriate with the application of a certain amount of phosphorus and potassium fertilizers. Combine irrigation with a small ditch.
The fruit is enlarged before the top dressing. Mainly for the early differentiation of flower buds to improve the nutritional conditions, generally based on the soil fertility status and basal fertilizer, flowering top dressing flexibility. The soil is more fertile, and the base fertilizer and the top-dressing at the flowering stage may not be applied or applied less, the soil is relatively poor, and the base fertilizer or the top-dressing at the flowering stage is less or may not be applied properly. The application rate is generally 0.1 kg to 0.4 kg urea or 0.3 kg to 1.0 kg ammonium bicarbonate per plant.
Fruit enlargement fertilizer. The main use of potash fertilizer, combined with a certain amount of nitrogen and phosphorus fertilizers, is mainly to promote the growth of fruits, increase the carbohydrate content of hawthorn, increase yield and improve quality. The potassium fertilizer per fruit tree is generally 0.2 kg to 0.5 kg of potassium sulfate, with 0.25 kg to 0.5 kg of ammonium bicarbonate and 0.5 kg to 1.0 kg of superphosphate.
Hawthorn has less demand for trace element fertilizers, mainly relying on organic fertilizers and soils. If organic fertilizers are used more, they may not be applied or micro-nutrient fertilizers may be applied. Organic fertilizers may be used less frequently to apply trace element fertilizers. The amount of trace fertilizer is calculated as the base fertilizer for specific fertilizers: the amount of borax mu is 0.25 kg to 0.5 kg, the dosage of zinc sulfate is 2 kg to 4 kg, the amount of manganese sulfate used is 1 kg to 2 kg, and the amount of ferrous sulfate is The dosage is from 5kg to 10kg (which should be applied together with high-quality organic fertilizer, and the ratio is 5:1 of organic fertilizer and iron fertilizer). The micro-fertilizer can also be foliar sprayed. The spraying concentration is controlled according to the degree of leaf aging. 0.1% ~ 0.5%, thin leaves should be thin when tender, older leaves can be thicker.
Rollators Walkers,Adult Rollators,Lightweight Rollator,Elderly Rollators Walkers
Jiangyin Huashi Medical Equipment Co.,Ltd , https://www.medicalwellcare.com