How to apply fertilizer during the expansion period of kiwifruit

Kiwifruit needs sufficient nutrients and water when it expands, so scientific and reasonable topdressing plays an extremely important role in improving the yield and quality of kiwifruit. So how to apply fertilizer during the expansion period of kiwifruit? Let's get to know each other with the editor.

1. Characteristics of fertilizer requirement

In kiwifruit, the absorption of nitrogen fertilizer accounts for 53% of the annual nitrogen demand, the absorption of phosphorus accounts for 55% of the annual phosphorus requirement, and the absorption of potassium accounts for 53% of the annual potassium requirement. This period is the peak of kiwifruit absorption of nitrogen, phosphorus and potassium, and it is also the maximum efficiency period of kiwifruit for nitrogen, phosphorus and potassium. This kind of topdressing should follow the combined application of formula fertilizer and bio-organic fertilizer, keep the fertilizer uniform, and should not apply one of them, so as not to affect the normal expansion of the fruit.

2. Types of fertilizers

Kiwifruit topdressing is generally divided into high nitrogen, high phosphorus and high potassium fertilizer and bio-organic fertilizer combined application, you can also choose nitrogen, phosphorus and potassium content ratio of 4:2:4 compound fertilizer, farmers can also purchase urea, diammonium phosphate, potassium chloride, according to a certain proportion of fertilizer.

3. Fertilizer application amount

The fertilization during the expansion period of kiwifruit should be determined according to the forest. In the 8-12-year-old orchard, 3.5-5 kg fertilizer was applied per tree, and 4-6 kg per tree for more than 13 years. In the early hanging orchard of 5-7 years, the application of fertilizer is 2-3.5 kg per tree, 1.5 kg per 4-year-old tree, and 0.2 jin of diammonium phosphate + 1 kg of bio-organic fertilizer per newly transplanted young tree.

4. Application method

During the expansion period, fertilization can be applied beyond 2/3 from the crown, that is, 60-100cm from the main stem of the tree, using hole application or radial ditch fertilizer, and then covering the soil, do not spread or strip application, do not mechanical fertilization.

5. Post-fertilization management

After fertilization, it is necessary to decide whether to irrigate according to soil moisture. If it is necessary to irrigate, it is recommended to use plastic hose. If there are sprinkler or drip irrigation facilities in the orchard, it is best to choose sprinkler or drip irrigation instead of flooding.

The above is the introduction of how to fertilize kiwifruit during the expansion period. I hope it can help you. If you want to know more about it, please follow us.