Fertilization techniques of different ages of kiwifruit

Kiwifruits of different ages have different growth conditions and require different fertilizers. According to the experience of fertilization at home and abroad and the experimental study on the fertilization of Chinese kiwifruit varieties, the Horticultural Research Institute of Jiangxi Academy of Agricultural Sciences proposed the proportion of fertilization in different ages, and obtained high-yield and high-quality kiwi fruit in production and application, so that the yield of kiwifruit was in the first fruit. The period reaches 3750-7500 kg per hectare, and the initial fruiting period reaches 15000-22500 kg per hectare, and the fruiting period reaches 22500-30000 kg per hectare.

1. Fertilization of young kiwi trees (1-2 year old trees) Fertilization of young trees is mainly to enlarge the canopy as soon as possible, forming it as soon as possible, and early results. Topdressing is mainly based on quick-acting nitrogen fertilizer. Follow up 2-3 times a year. Before the first germination, 50 g of urea was applied and 50 g of urea was applied to the shoots. Later, depending on the growth of the kiwifruit tree, the fertilizer was applied.

2. Fertilization of kiwifruit trees (3-4 years old trees) in the early fruit period The kiwifruit in this period is still mainly shaped by plastic surgery. At this time, kiwifruit has a dominant position in vegetative growth, but it has begun to turn to reproductive growth. All the trees are flowering and have a certain yield. The total annual fertilization of kiwifruit trees in the early fruiting period and the proportion of fertilizers in the main fertilization period can be determined by referring to Table 4-4.

The amount of kiwifruit applied per hectare in this period can be referred to the following data: base fertilizer, 1500 kg of straw or 1500 kg of livestock manure, 1500 kg of cake fertilizer, 750 kg of calcium phosphate fertilizer; pre-emergence fertilizer, 150 kg of urea; strong fruit fertilizer, compound compound 450 kg of fertilizer or 225 kg of potash.

3. Fertilization of kiwifruit trees (5-6 years old trees) in the early fruiting period During this period, the kiwifruit tree shape has formed and is covered with a frame, the tree trend begins to turn to the middle, and reproductive growth and vegetative growth begin to balance. The proportion of fertilizer applied in the whole year and the fertilizer in the main fertilization period can be determined by referring to Table 4-5.

The fertilization amount of kiwifruit per hectare in this period is as follows: base fertilizer, 2400 kg of cake fertilizer, 22500 kg of livestock manure or 22500 kg of straw, 1200 kg of calcium magnesium phosphate; bud of pre-emergence, 225 kg of urea or 375 kg of compound fertilizer; Compound fertilizer 750 kg or potassium fertilizer 375 kg; pick fruit fertilizer, depending on the tree potential.

4. Fertilization of kiwifruit trees (6-year-old trees) during the fruiting period During this period, the reproductive growth and vegetative growth of kiwifruit are relatively balanced, which is a period of high-quality and high-yield kiwifruit. The proportion of fertilizer applied in the whole year and the fertilizer in the main fertilization period can be determined by referring to Table 4-6.

The fertilization amount of kiwifruit per hectare is as follows: base fertilizer, cake fertilizer 36,000 kg, animal manure or straw 30,000 kg, calcium magnesium phosphate fertilizer 3000 kg; pre-emergence fertilizer, application compound fertilizer 450 kg or urea 300 kg; strong fruit fertilizer, Shi Compound fertilizer 900 kg or potassium fertilizer 450 kg; pick fruit fertilizer, according to the tree potential application.

The type of fertilizer applied can be determined according to the local fertilizer conditions. When applying, according to the different ages and the content of active ingredients of different fertilizers, refer to the above criteria, calculate the required amount of various fertilizers, and rationally apply fertilizer.

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