Kiwifruit fertilization is divided into basal fertilizer and top dressing, and top dressing can be divided into germination fertilizer (before spring bud germination), flowering fertilizer (before flowering), fruit promotion fertilizer (after flowering to before the expansion of young fruits), fruit strengthening fertilizer (fruit swelling and weight gain, glycemic and color enhancement period) and basal fertilizer (after fruit picking to before defoliation). Germination fertilizer and flowering fertilizer are called spring fertilizer, fruit-promoting fertilizer and fruit-strengthening fertilizer are called summer fertilizer, and basal fertilizer is called autumn fertilizer.
Fertilize before flowering. It is generally carried out after the beginning of the kiwifruit injury period and before germination, and the effect of high nitrogen and functional fertilizer is good. Nitrogen fertilizer can use urea or high-nitrogen compound fertilizer, potassium chloride is also OK, and the chlorine-loving characteristics of kiwifruit can be used to reduce costs. 0.5-1 kg of compound fertilizer or 20-30 kg of decaying human feces and urine were applied. Functional fertilizers are Yitushi, chitin, seaweed extract, Haibao fertilizer, etc. Remember not to use hormone-containing powders, liquid fertilizers, and functional fertilizers that you don't know about.
Robust flowers are inseparable from boron and zinc fertilizers. The foliar spray of safe and reliable boron fertilizer and zinc fertilizer before the white flowers of kiwifruit flowers. Because the leaves are tender and the flowers are small at this time, it is the most fragile and sensitive period for kiwifruit, and the foliar fertilizer should not be too miscellaneous and too thick. It is necessary to choose a boron and zinc fertilizer with reliable quality assurance, otherwise it will damage the flower buds and affect the fruit. At this time, it is also the peak and sensitive period of kiwifruit's demand for boron fertilizer, once boron deficiency will cause incomplete pollination, physiological fruit drop after pollination. Recommended use: 2-3 sprays per 20 g of polyboron to 1 nebulizer (15 kg) of water, and zinc oligosaccharides per 5 g to 1 nebulizer (15 kg) of water.
Fertilize after flowering. Generally, it is applied in May and June within 1 month after the kiwifruit flowering, which is the second peak of the root system of kiwifruit and the rapid expansion of young fruits, and the growth of the fruit is also in this period, and its weight gain proportion accounts for almost 80% of the whole fruit weight. Therefore, it is necessary to reapply the fruit-strengthening fertilizer, combined with multiple foliar top dressings. Fruit-strengthening fertilizer should be based on phosphorus and potassium compound fertilizer, and 1-1.5 kg of compound fertilizer can be applied to the plant or 1 kg of rotted dry cake plus 0.5-l kg of potassium chloride fertilizer. Foliar fertilizer can be sprayed with 300 times amino acid compound micro-fertilizer, 0.3%-0.4% potassium dihydrogen phosphate, 0.3%-0.5% urea, 0.3%-1% superphosphate extract, 0.05%-0.1% ferrous sulfate, etc.
Fertilization of kiwi flowers before and after flowering should be introduced here in time, I hope it will help you. If you want to buy high-quality and high-yield kiwifruit seeds, you can download the seed bank App, and the country's excellent kiwifruit varieties are available for everyone to choose.
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