How to apply fertilizer to overwintering spinach

The temperature in winter is very low, so when planting overwintering spinach, we need to focus on fertilization. Improper fertilization has a great impact on the growth of spinach, which can not meet the growth nutrition needed for spinach growth, resulting in a decline in yield and quality. So how to apply fertilizer when growing overwintering spinach? Today, the editor will give you a brief introduction. Let's take a look at it.

1. Apply sufficient base fertilizer

When growing overwintering spinach, the first fertilizer we have to apply is base fertilizer. Because of the low temperature in winter, the growth period of overwintering spinach is very long, if there is no adequate nutrition, then spinach is likely to lose fat due to lack of nutrition. As a result, the overwintering spinach can not survive the winter safely, the yield is reduced, and in serious cases, it will lead to a large number of spinach deaths. Therefore, we must pay attention to the application of sufficient base fertilizer, which is mainly based on rotten farm manure, and do a good job of land preparation and bed work after fertilization.

2. Apply less nitrogen fertilizer

The standard of fertilization for spinach before overwintering is to ensure that spinach can grow at least 5 leaves before overwintering. Because the 5-leaf spinach plant has the strongest cold resistance, too much or too little spinach plant is easy to suffer frost damage. Therefore, if the sowing time is appropriate, then we must apply sufficient fertilizer, we should pay attention to control the amount of nitrogen fertilizer, do not apply too much, to avoid spinach overgrowth. It led to the decrease of dry matter and nutrition accumulation of spinach plant and frost injury. If the sowing time is too late or the soil fertility is low, then some nitrogen fertilizer can be applied properly to ensure that the seedlings overwinter at an appropriate stage.

3. Fertilization after turning green

After spinach overwintering to return to green stage, the most important thing of fertilization is to grasp the time of topdressing and watering at the same time. Because after the spinach turns green, if the topdressing time is too early, it will lead to a drop in soil temperature, affecting the slow seedling and growth of spinach seedlings. Topdressing time should not be too late, which will also affect the growth of spinach. Therefore, the green fertilizer of overwintering spinach should be topdressing in March and April respectively, because at this time the external temperature is gradually rising, which is conducive to the growth and development of spinach.

4. Fertilization after overwintering

Fertilization after overwintering should be carried out before spinach begins bolting and flowering. Fertilization in this period can effectively prolong the bolting and flowering time of spinach and achieve the purpose of increasing production. However, it should be noted that spinach is sensitive to ammonia nitrogen fertilizer. The growing season of spinach happens to be during the changing season, the soil temperature is not high, and the digestibility of the soil is relatively poor, so it is best to use little or no ammonia nitrogen fertilizer, mainly nitrate nitrogen.

The above is a brief introduction to how to fertilize overwintering spinach. That's all for today's introduction. This article is for reference only. I hope it can help you all.