How to identify fertilizer deficiency in rape cultivation

Rapeseed is one of the most important oil raw materials in China. At the same time, fresh and tender rape and budding rape flowers can be eaten as vegetables. Rape has strong resistance and has been planted all over China, but mainly in Anhui, Henan and other places. However, when we plant rape, there will inevitably be some deficiencies in fertilization technology. So today, the editor will tell you what symptoms rape shows when it lacks fertilizer, and what we should do to remedy it after the lack of fertilizer.

Symptoms of lack of fat

Rape fertilizer deficiency symptoms are mainly divided into four kinds, the lack of different kinds of fertilizer, then it shows different symptoms, natural remedial measures will also be different. The four symptoms of rape fertilizer deficiency are nitrogen fertilizer deficiency, phosphorus fertilizer deficiency, potassium fertilizer deficiency and boron deficiency. Let's take a look at it next.

1. Lack of nitrogen fertilizer

The main purpose of nitrogen fertilizer is to promote the growth of rape plant, and its critical point of fertilization is from bolting to early flowering stage. If rapeseed lacks nitrogen fertilizer, the plant growth is slow, the plant is short, the branches are few, and the weight and number of pods and rapeseed are reduced. Secondly, the leaves of rape are thin and small, the color of the leaves is light, and sometimes even red.

2. Lack of phosphate fertilizer

If rape is lack of phosphate fertilizer, then the root system of rape plant is underdeveloped, and the root system is smaller. Secondly, the rape leaves will not be very large, the leaves are thicker, and the leaves are darker, usually dark green or even dark gray. When there is a serious lack of phosphate fertilizer, the leaves are likely to turn dark purple and show symptoms of wilting. Finally, there is a performance that the speed of flower bud differentiation of rape is relatively slow, which seriously affects the best fruiting period of rape.

3. Lack of potash fertilizer

In the early stage, when the rape field is lack of potash fertilizer, the leaves at the bottom of the rape plant will slowly appear yellowing phenomenon, of course, do not rule out special cases, sometimes the bottom leaves will appear curl wilt, stem Fusarium wilt has obvious signs of breaking. Secondly, the flowering of rape buds is abnormal, and the growth and development period is prolonged, which will make rape miss the time of best yield and quality.

4. Boron deficiency fertilizer

Rape is very sensitive to boron fertilizer, so once there is a lack of boron fertilizer, then some symptoms can be found in rape plants. Especially in the late flowering stage and fruiting period, the symptom of lack of boron fertilizer was the most obvious. During the period of flowering and fruiting, if there is a lack of boron fertilizer, it will blossom and fail to bear fruit, which will seriously affect the yield of rape.

II. Fertilization techniques and remedial measures

In order to avoid the phenomenon of lack of fertilizer in rape, then we first need to re-apply base fertilizer, and then apply fertilizer scientifically. For example, early application and increased application of seedling fertilizer, stable application of bolting fertilizer, skillful application of flower fertilizer, supplementary application of grain fertilizer and so on. So when rape appears the phenomenon of fertilizer deficiency, we need to take remedial measures in time. If there is a lack of nitrogen fertilizer, it is necessary to apply an appropriate amount of urea per mu. If there is a lack of phosphate fertilizer, it is necessary to topdressing 10 jin of calcium phosphate per mu. Lack of potash fertilizer, each mu needs to apply 10-15 jin of potassium sulfate and 400 jin of plant ash. Lack of boron fertilizer, it is necessary to topdressing about 200 grams of borax, mixed with water after foliar spraying.

The above is what the editor would like to share with you today, the analysis of the symptoms of rape fertilizer deficiency and its correct fertilization methods, remedial measures after fertilizer deficiency, hoping to help you. If you want to know more about rape cultivation, remember to follow us.