How to determine the amount of fertilizer applied to grapes

The amount of fertilizer applied to grapes should be determined according to the amount of nutrients absorbed by the grape plants, the natural amount of feed, and the amount of human application. Natural supply, nitrogen generally accounts for about l/3 of the absorption, and phosphorus and potassium account for l/2 each. The use of fertilizers by grape plants was 50% for nitrogen, 30% for phosphorus, and 40% for potassium. Take 2000 kg of berry in an area of ​​667 square meters for example. The nitrogen (N), phosphorus (P205) and potassium (K20) absorbed by grape plants are 12 kg, 6 kg and 14.4 kg, respectively; the natural supply should be 4 kg respectively. , 3 kg, 7.2 kg; artificial supply should be 8 kg of nitrogen, 3 kg of phosphorus, 7.2 kg of potassium; taking into account the fertilizer utilization rate of grapes, the actual amount of fertilizer should be 16 kg of nitrogen, 10 kg of phosphorus, 18 kg of potassium. According to analysis of some foreign materials, for each additional 100 kg of grape production, 0.3-0.55 kg of nitrogen, 0.13-0.28 kg of phosphorus, and 0.28-0.64 kg of potassium need to be absorbed from the soil. In production, the nutritional status of the plants can be judged based on the state of the grape's growth results, which in turn can guide the fertilization. For example, new shoots develop well, internodes are short, and the base and apex are more uniform; after the shoots are picked up, the auxiliary shoots germinate more prosperously; the bases, middle and upper leaves of the new shoots are large and uniform, thick and dark green; At the same time, the new shoot turned brown, and the fruit was well-colored with high sugar content; budding in the coming year was neat and so on, indicating proper amount of fertilization. If the shoots are thin and grow slowly, the shoots in autumn and deciduous period will still be green, they will not be lignified, the marrow will be large, and the tissues will not be full; the leaves will be small and thin, and the color will be yellowish green; the fruit will have poor coloring, low sugar content, and will sprout in the coming year. Late and not neat, after the winter, dendrite is vulnerable to freezing damage, which is the performance of lack of fertilizer. The branches and leaves are long and overly dense, the tree vigor is excessively prosperous, the new shoots are long, and the growth stops too late. After flowering, fruit setting is low and the yield is not high. This is a response to improper fertilization or excessive fertilization. According to the above judgment, the fertilization technique and the amount of fertilizer can be adjusted. Under normal circumstances, the ratio of nitrogen, phosphorus and potassium applied to grapes is preferably 1:0.5:1.5, or 1:1:1.5. The relatively stable production of vineyards in northern China generally has a fertilization amount of 667 square meters, nitrogen (N) is 12.5 to 15 kg, phosphorus (P20b) is 10 to 12.5 kg, and potassium (K20) is 10 to 15 kg. .

We mainly export European Chinese onions, garlic and ginger.

Fresh yellow onion and red onion size 60-80mm 70-90mm 90-110mm 10kg/net bag, 20kg/net bag or 25kg/net bag (2019 new crop onion)

Peeled yellow onion and red onion size 60-80mm 70-90mm 90-110mm 10kg / box, 20kg / box, filled with nitrogen, storage time of 90 days.

Frozen onion, frozen onion cube, frozen onion ring 10kg/box or 20kg/box Save for 2 years.

We also offer garlic, ginger and peeled garlic

Our onions have been sold in the Netherlands, the UK, Poland, and Italy, and the quality is very good.

Looking forward to your response, I am very happy to quote you.


Garlic.Ginger.onion.peeled Onion.peeled Garlic.frozen Onion Pieces

garlic.Ginger.onion.peeled onion.peeled garlic.frozen onion pieces

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