The latest sweet potato fertilizer considerations

Sweet potato has a very long edible history in China. It is a major food crop and has a large planting area in our country. When planting sweet potato, fertilization is very important, and reasonable fertilization is the key to meet the growth and nutrition of sweet potato. When applying fertilizer, there are many things that need our attention. So the editor brings you some notes on sweet potato fertilization today, let's take a look at it!

1. Foliar fertilizer

When we apply fertilizer, we should combine it with watering. After the sweet potato enters the expansion period, we should pay attention to control the application of nitrogen fertilizer to prevent the overgrowth of sweet potato plants caused by excessive nitrogen fertilizer. Then we have to control moisture. When applying fertilizer to sweet potato, we should not only do the work of fertilizing inside the root, but also pay attention to the work of topdressing outside the root. Extra-root topdressing is the proper spraying of foliar fertilizer, reasonable spraying of foliar fertilizer can effectively enhance leaf growth ability, promote photosynthesis and increase photosynthetic matter accumulation. The commonly used foliar fertilizer is potassium dihydrogen phosphate and other solutions, which can be sprayed directly to the leaves.

2. Apply sufficient base fertilizer

Before we plant sweet potatoes, we should apply sufficient base fertilizer, which is, of course, based on rotten farm manure, combined with an appropriate amount of chemical fertilizer. Base fertilizer generally accounts for about 70% of the total amount of fertilizer applied. Usually per mu to apply 3500kg base fertilizer, and then mixed with 20kg about calcium superphosphate and appropriate amount of plant ash, ammonium bicarbonate and other substances. When applying base fertilizer, we should pay attention to controlling the application method, mainly by two methods, such as concentration and stratification. Generally, 3x5 was applied to the bottom layer during deep ploughing, and then 2Accord 5 was mainly applied in holes during planting. To ensure that sweet potato seedlings can effectively absorb nutrients after survival.

3. Raising seedling fertilizer

In the application of seedling fertilizer, we should pay attention to the selection of fertilizer, which is generally based on available nitrogen fertilizer. About 4 days after planting, together with the work of checking and replenishing seedlings. The main method of raising seedling fertilizer is to open a hole. First, dig a hole of about 10 cm near the hole of the seedling, close to the root, and then apply an appropriate amount of urea. Generally, the amount of application per mu can be kept at about 3 kg. After application, properly watering, and then covering the soil, can also be directly irrigated with urea water to alleviate the lack of slow fertilizer efficiency.

4. Strong vine fat

After the sweet potato entered the strong vine stage, the underground part of the sweet potato plant began to grow and gradually formed a root tuber. At this time, the ability to absorb fertilizer is very strong, so in order to speed up the expansion of leaf area. To enhance the light and production efficiency of the plant, strong vine fertilizer should be applied one month after sweet potato planting. The amount of fertilizer should be controlled according to the soil fertility and the growth of seedlings, and the main fertilizer is ammonium sulfate or urea or ammonium nitrate. If the sweet potato seedlings are growing well, then the amount of fertilizer can be reduced appropriately, on the contrary, if the growth is poor, then more fertilizer should be applied appropriately. In addition, we should also pay attention to weeding, irrigation and other work.

The above is a brief introduction of the matters needing attention in the fertilization of sweet potatoes. That's all for today's introduction. This article is for reference only. I hope it can help you all.