How to Fertilize Sweet Potatoes During the Bulking Stage? A Detailed Guide to the Latest Methods
The bulking stage of sweet potatoes occurs every year from July to September. This stage is the critical period for sweet potato yield formation and also the period of greatest fertilizer demand; insufficient fertility may affect sweet potato yield. So how should sweet potatoes be fertilized during the bulking stage? Follow the editor to take a look.
1. Hole-eye topdressing method
A wooden stake can be used to make a hole about 30 cm deep at a distance of 20-30 cm from the main root, and an appropriate amount of ternary compound fertilizer can be placed into the hole. After application, seal it well with moist soil. If one hole is made on each side of the ridge, the effect is even better. This fertilization method can increase yield by about 20% per mu. Farmer friends with low yields can adopt this fertilization method.
2. Crack topdressing method
When sweet potatoes are bulking, cracks of varying sizes often appear on the ground surface, and we can use these cracks for fertilization. Per mu, use 0.5 kg of potassium dihydrogen phosphate mixed with 400 kg of water, or 2.5 kg of urea and 10 kg of superphosphate mixed with 500 kg of water, to prepare a fertilizer solution and pour it into the cracks. Generally pour in about 0.7-1 kg. After half a month, per mu use another 100 kg of plant ash plus 500 kg of water, soak it for 4-5 hours, then take the leachate and pour it into the cracks. After pouring, seal the cracks tightly with soil. This can also achieve an obvious yield-increasing effect.
3. Foliar spraying method
There are many types of foliar fertilizers suitable for spraying on sweet potatoes. With potassium dihydrogen phosphate, a 0.3% potassium dihydrogen phosphate solution can be sprayed on the leaves once every 7 days, increasing yield by about 18%-20%. In addition, the ecological agent Diguo Zhuangtiling can also be used to thicken the nutrient transport ducts of underground fruits, improve the bulking vitality of underground fruits, make the fruit surface smooth, the fruit shape robust, and achieve high quality and high yield. The best spraying time is around 5 p.m.
The above is an introduction to fertilization methods for sweet potatoes during the bulking stage. We hope it can help you. To learn more related knowledge, please stay tuned to us.