Topdressing technology of apple fruit during expansion
1. Fertilization time: July to early August 2. Fertilizer varieties and quantity: mainly phosphorus and potassium fertilizers, each tree is applied with 2 kg of diammonium + 2.5 to 3 kg of potassium sulfate or special fertilizer for fruit trees with phosphorus and potassium, and 80 to 100 kg per mu. 3. Fertilization method: Borrow rain while applying fertilizer. There is much rain this year, and apply it in time before or after rain. (1) Underground top dressing 1. Radial fertilization: Dig 4-6 radial grooves into the crown under the vertical projection of the tree crown, the length is 0.5 meters from the trunk, the groove depth is 15-20 cm, and the groove width is 20 cm. Fertilizer was evenly applied in the ditch and backfilled. 2. Fertilize in holes: Dig 6-8 small pits 20 cm long and 15 cm deep around the canopy. Spread fertilizer evenly in each small pit and backfill. 3. Liquid fertilization: Mix the fertilizer into a liquid and use a fertilizing gun to inject fertilizer under the tree tray. (2) Foliar spraying fertilizers, such as potassium dihydrogen phosphate and rich potassium fertilizer, are diluted into 0.3% to 0.5% liquid fertilizers, and sprayed evenly on the leaves. The front and back sides of the leaves should be sprayed at intervals of 10 to 15 days. Once, spray 3 times. Disclaimer: Some articles of this website are transferred from the Internet. If the legal rights of third parties are involved, please inform this website for processing. phone Ganoderma lucidum extract,Senna leaf powder，Fritillaria Extract Fufeng Sinuote Biotechnology Co.,Ltd. , https://www.sntextract.com