Matters needing attention in fertilization of sweet potato

Sweet potato has a very long history of eating in China. It is a major food crop and has a large planting area in China. When planting sweet potato, fertilization is very important, reasonable fertilization is the key to meet the growth and nutrition of sweet potato. And when it comes to fertilization, there are a lot of places that need our attention. So Xiaobian brought you some precautions for sweet potato fertilization today. Let's take a look at it together.

1. Foliar fertilizer

When we apply fertilizer, we should combine it with watering. After sweet potato enters the expansion period, attention should be paid to controlling the application of nitrogen fertilizer to prevent excessive nitrogen fertilizer from causing sweet potato plants to grow excessively. Then we should control the water content. When fertilizing sweet potatoes, we should not only do the work of fertilizing inside the roots, but also pay attention to the work of topdressing outside the roots. Topdressing is to spray foliar fertilizer properly. Reasonable spraying foliar fertilizer can effectively enhance leaf growth ability, promote photosynthesis and improve photosynthetic matter accumulation. Commonly used foliar fertilizer has potassium dihydrogen phosphate solution, directly to the leaves can be sprayed evenly.

2. Apply enough basal fertilizer

Before planting sweet potatoes, we should apply sufficient base fertilizer, which is of course based on decomposed farm manure, with appropriate amount of chemical fertilizer. Basal fertilizer generally accounts for about 70% of the total amount of fertilizer. Usually 3500kg of base fertilizer should be applied per mu, and then mixed with about 20kg of calcium superphosphate and appropriate amount of plant ash, ammonium bicarbonate and other substances. When applying base fertilizer, attention should be paid to controlling the application method, focusing on two methods such as concentration and layering. Generally 3/5 is applied to the bottom layer during deep ploughing, and then 2/5 is mainly applied to holes during planting. Ensure that sweet potato seedlings can effectively absorb nutrients after survival.

3. Raising seedling fertilizer

When applying fertilizer for raising seedlings, we should pay attention to selecting fertilizer, which is generally based on available nitrogen fertilizer. About 4 days after planting, it is carried out together with seedling inspection and seedling supplementation. The application method of seedling fertilizer is mainly to open a hole. First, dig a hole about 10 cm near the seedling hole, close to the root, and then apply appropriate urea. Generally, the application amount per mu can be kept at about 3 kg. After application, water properly, then cover the soil, or directly irrigate the roots with urea water, so as to alleviate the deficiency of slow fertilizer efficiency.

4, strong vine fat

After sweet potato entered the strong vine stage, the underground part of sweet potato plant began to grow larger and gradually formed root tuber. 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 plants, strong vine fertilizer should be applied one month after sweet potato planting. According to the fertility of the soil and seedling growth control fertilizer, fertilizer ammonium sulfate or urea or ammonium nitrate based. If the sweet potato seedlings grow well, then the amount of fertilizer can be appropriately reduced. On the contrary, if the growth is poor, then more fertilizer should be applied appropriately. In addition, we should pay attention to weeding, irrigation and other work.

The above is a simple introduction to sweet potato fertilization precautions. Today's introduction is here, this article is for reference only, I hope to help everyone oh!