Skillful fertilization to improve kiwifruit yield tips for topdressing kiwifruit in four seasons

According to the law of growth and fertilizer demand of kiwifruit, Green Food Network summarized four best fertilization methods for kiwifruit, which can be used as a reference for fruit growers.

Kiwifruit

① accelerates budding and fattening in early spring. After the soil thawed and the sap flowered in spring, the tree began to move. Fertilization in this period was beneficial to kiwifruit sprouting and flowering and promoting new shoot growth. Sprouting fertilizer should be applied before kiwifruit germination, mainly quick-acting nitrogen fertilizer (nitrogen fertilizer accounts for 1% of the total amount of nitrogen fertilizer used in the whole year) and a small amount of phosphorus and potassium fertilizer. 4-year-old rhesus monkeys were fertilized with 10kg pure nitrogen, 4kg pure phosphorus and 4kg pure potassium per mu. Sprinkle or plant fertilizer in the whole garden, and then irrigate spring water 1 MUR 2 times.

② promotes fruit fertilizer after anthesis. 30-40 days after falling flower is the rapid expansion period of kiwifruit. At this stage, kiwifruit grows rapidly, its volume increases rapidly, and lack of fertilizer hinders the expansion of rhesus monkeys. Fruit-promoting fertilizer was applied 30 days after falling flower, mainly quick-acting compound fertilizer. At the same time, Zhuangguotiling was sprayed to thicken the pedicel and increase the amount of nutrition transport. Prevent falling flowers, falling fruit, cracking fruit, stiff fruit and abnormal fruit, making the fruit beautiful in color, beautiful in shape and good in taste. Each 4-year-old kiwifruit tree can be treated with 0.25 kg potassium dihydrogen phosphate 0.3 kg. The whole garden was watered once after the application.

③ has strong fruit and fat in midsummer. In order to enrich kiwifruit inside and improve the weight and quality of single fruit, phosphorus and potash fertilizer can be applied once from June to July. In order to make up for the lack of nutrition during the shoot growth of kiwifruit in the later stage, 1-2 times of available nitrogen fertilizer can also be sprayed on the leaves. Foliar spraying calcium fertilizer in this period can also enhance the storability of kiwifruit. For foliar spraying, 0.5% potassium dihydrogen phosphate, 0.3% urea solution and 0.5% calcium nitrate can be selected.

Overwintering fertilizer of ④ after fruit harvest. After fruit picking, kiwifruit leaves lose a lot of nutrients, so it is particularly important to supply nutrients to kiwifruit trees. Before defoliation, 0.5% urea can be sprayed once to increase leaf photosynthesis, promote the return of nutrients to roots and stems, and increase nutrient storage. In autumn, it is appropriate to apply organic manure such as circle manure, retting manure, compost, barnyard manure and cake manure, and mix some available fertilizers such as calcium superphosphate and ammonium nitrate. Generally, 4-year-old rhesus monkey peach trees should apply 20ml 30kg organic fertilizer, plus 0.25kg calcium superphosphate and ammonium nitrate. It can be sprinkled in the whole garden or ditched. Irrigate once after application.