How to fertilize kiwifruit, fertilization technology

2020-07-22

How to fertilize kiwifruit, fertilization technology
(1) The soil begins to thaw in spring. After the sap flows, the tree begins to move. Fertilization at this stage is conducive to germination and flowering, and promote the growth of new buds. High nitrogen fertilizer and a small amount of phosphorus and potassium fertilizer should be applied before germination. For example, large element water-soluble fertilizer 30-10-10 and potassium dihydrogen 0-52-34.
(2) During the growth period, balanced fertilizer 20-20-20 is used for balanced absorption and growth.
(3) At flowering stage, high phosphorus 12-50-7 was used to promote flower bud differentiation, protect flowers and promote fruit.
(4) It is suggested to use potassium to transport the world 13.5-0-46 and high potassium water-soluble fertilizer 14-6-40 in the early fruit stage. Observe the fruit growth and pay attention to it. Prevent flower falling, fruit falling, fruit cracking, frozen fruit and abnormal fruit.
(5) During the expansion and color conversion period, use fertility potassium dihydrogen phosphate 0-52-34 and water-soluble potassium sulfate 0-0-52 to control nitrogen as much as possible to ensure color.
(6) In order to improve the quality of kiwifruit and increase the weight of a single fruit, it is recommended to spray phosphorus and potassium fertilizer on the leaves from June to July. You can choose 0.5% potassium dihydrogen phosphate, 0.3-0.5% urea solution and 0.5% calcium sugar alcohol.
(7) After picking the fruit, apply overwintering fertilizer, and the leaves will lose a lot of nutrition after picking the fruit. Before defoliation, 0.5% urea solution can be sprayed on the leaves once to increase the photosynthesis of the leaves, promote the return of nutrients to the roots and stems, and increase the nutrient reserve. It is suggested to apply base fertilizer in early autumn, mainly organic fertilizer, such as fertilizer, compost, fertilizer, cake fertilizer, etc., and mix some fertilizers, such as ammonium superphosphate, ammonium nitrate, etc. Water once in time after use.
Kiwifruit Topdressing Time
Kiwifruit can be sprayed with fertilizer on the leaf surface from germination to defoliation. The amount of boron required during flowering is large. Boron can be sprayed 3-4 times from pre flowering to flowering, with an interval of 5-7 days. More nitrogen is needed in the growth period of new shoots. Urea, diammonium phosphate and humic acid leaf fertilizer should be sprayed at the 5-leaf stage to promote leaf growth, increase leaf thickness and improve photosynthetic efficiency. The application times are 5-6 times with an interval of 5-7 days. Spraying potassium dihydrogen phosphate and amino acid calcium during fruit ripening can promote fruit ripening and improve fruit quality. In case of element deficiency, fertilizer should be selected and sprayed immediately.
Spraying foliar fertilizer should be carried out after 4 pm on cloudy or sunny days. It is forbidden to expose to high temperature or hot sun, otherwise burning the foliar will cause fertilizer damage. If the interval after spraying is less than 2 hours and it rains, it should be supplemented in time.
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Application skills and precautions of water-soluble fertilizer

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