What kind of fertilizer is applied to kiwifruit in spring

Sprouting fertilizer should be applied to kiwifruit in spring, which is usually carried out in March, which is mainly combined with chemical fertilizer and organic fertilizer, which is mainly composed of high nitrogen, medium phosphorus and low potassium fertilizer, urea and diammonium phosphate in proportion. Organic fertilizer is mainly commercial organic fertilizer or biological organic fertilizer. Spring is the peak growing season of kiwifruit, which needs a lot of nutrients, so we can use the method of ditch ring application to fertilize, be careful not to damage the root system, and water it in time after fertilization, which is more conducive to nutrient absorption and utilization.

What kind of fertilizer should be applied to kiwifruit in spring

Topdressing kiwifruit in spring can also be called sprout fertilizer, and its main purpose is to promote its germination and branch and leaf growth, so as to supplement nutrients for kiwifruit florescence and improve fruit setting rate.

1. Types and proportion of fertilizers

(1) Chemical fertilizer: the formula fertilizer is mainly composed of high nitrogen, medium phosphorus and low potassium, and can also be applied in proportion with urea and diammonium phosphate.

(2) Organic fertilizer: mainly commercial organic fertilizer or bio-organic fertilizer.

(3) Fertilizer ratio: according to the characteristics of soil nutrients and kiwifruit fertilizer requirement, sprout fertilizer can be mixed: 100 jin formula fertilizer, 160 jin organic fertilizer, or 100 jin urea, 20 jin diammonium phosphate, 160 jin organic fertilizer.

2. Fertilizer application amount

(1) Young trees: each newly planted young tree can be applied 0.2 jin of diammonium phosphate and 1 jin of organic fertilizer, or sprout fertilizer may not be applied.

(2) early hanging orchard: 5-7 years tree, each tree can be used, the fertilizer mixed according to the above proportion is about 2-3 jin, and each 4-year-old tree can be applied about 1.5 jin.

(3) full fruit period: in 8-12 years orchard, each tree can be used, the mixed fertilizer according to the above proportion is about 3-4 jin, and each fruit tree over 13 years old can use about 4-5 jin.

3. Application method

In addition to two-thirds of the canopy, that is, 60-100cm from the trunk of the tree in the orchard, hole application or radial ditch application can be used to cover the soil.

II. Matters needing attention in planting kiwifruit

1. Timely anti-freezing

The main results are as follows: (1) the temperature in early spring is still relatively low, and the cold resistance of kiwifruit is poor, and freezing injury is easy to occur in early spring in many places. Therefore, in early spring, we must take timely measures to prevent frost injury to avoid unnecessary losses.

(2) generally, if the temperature in early spring is lower than 2 ℃, it is necessary to do a good job of prevention, and white tree trunks or smoking can be used to prevent frost injury.

2. Pruning branches and leaves

The main results are as follows: (1) after kiwifruit is pruned in winter, the branches and leaves should be pruned in spring. Because winter pruning disease and insect branches or withered branches may not be too thorough, need to be pruned in time, but also need to trim off excess branches and leaves, so as not to take away nutrients.

(2) in order to promote the growth of kiwifruit, it is necessary to pick the heart, wipe the bud and remove the bud in time.

3. binding of branches and vines

(1) the binding of kiwifruit branches is a very important task. First, select the main branches of kiwifruit, and then tie them along the bracket.

(2) in the process of binding, it is necessary to keep the other branches perpendicular to the main branches, which is helpful to promote the germination of winter buds.

(3) when the bud appears, it is necessary to remove all the buds on the main vine, and then smear a layer of Daozhibao on it to promote the growth of lateral branches.

(4) finally, the excess branches and leaves were removed, and then the resulting branches were tied to the support to allow them to crawl and grow, so as to reduce the incidence of diseases.

4. prevention and control of diseases and insect pests

(1) in spring, we must do a good job in the prevention and control of diseases and insect pests, such as preventing canker, root rot and so on. Before the plant sprouts, a small amount of Baumetulite sulfur mixture and carbendazim can be sprayed in the garden to irrigate the roots.

(2) the most direct way is to scrape off all the eggs and disease spots of the kiwifruit branches, and pay attention to apply a layer of preventive medicine, which is conducive to wound healing and avoid infection of other diseases.