Latest summary of greenhouse vegetable fertilizing mistakes - don't make these mistakes again when growing vegetables
Most vegetable planting models today are mainly greenhouse cultivation. Although the investment in greenhouse vegetables is higher than open-field cultivation, their output is also very high. Therefore, they are favored by many growers. When carrying out greenhouse vegetable production, fertilizing work is very important. However, many vegetable farmers actually have many misconceptions when fertilizing. So what exactly are the misconceptions? Let's take a look together below!
1. Using trace elements as base fertilizer
When planting greenhouse vegetables, many vegetable farmers, in order to save trouble, add trace elements when applying base fertilizer. Although some trace elements can be used as base fertilizer, there are also some elements that are difficult to transform and oxidize, causing them to ultimately lose their fertilizing effect. For example, ferrous sulfate easily forms ferric iron in the soil, thereby losing its original value. Therefore, trace elements are best applied mainly as foliar fertilizer, so that vegetables can absorb them as quickly as possible, and the effect is also relatively obvious.
2. Ammonium sulfate and ammonium bicarbonate
When planting, some growers, in order to achieve the purpose of promoting plant growth, apply nitrogen fertilizer without control, and ammonium bicarbonate and ammonium sulfate are common fertilizers among them. After ammonium bicarbonate is applied to the soil, it is very easy to produce a large amount of ammonia gas. If the greenhouse has poor ventilation, root and leaf scorching is very likely to occur, causing fertilizer damage to the plants. Ammonium sulfate is an acidic fertilizer and easily causes the soil to become too acidic. Therefore, when fertilizing, attention should be paid to controlling the amount of fertilizers such as ammonium sulfate and ammonium bicarbonate. Reasonably applying base fertilizer can ensure sufficient nitrogen elements.
3. Base fertilizer containing a large amount of diammonium phosphate
The main components of diammonium phosphate are nitrogen and phosphorus pentoxide, and it contains no potassium at all. However, in vegetable cultivation, potassium fertilizer is very important. Therefore, when applying base fertilizer, attention should be paid to controlling the content of diammonium phosphate to prevent excessive available phosphorus in the soil and avoid inhibiting the absorption of potassium by vegetables. Moreover, phosphorus easily reacts chemically with substances such as calcium, iron, and aluminum, thereby affecting utilization rate. Therefore, everyone should pay attention to the rational use of diammonium phosphate.
4. Using undecomposed farmyard manure
As a natural fertilizer, farmyard manure is very beneficial to the growth of vegetables. However, when applying farmyard manure, attention should be paid to ensuring it is fully decomposed. If it is not decomposed, farmyard manure will produce a large amount of ammonia gas. The plants are also very prone to root burning, causing various diseases and insect pests, and seriously affecting the growth of vegetables. Therefore, when applying farmyard manure, everyone must pay attention to fully decomposing it. Also, pay attention to using more potassium fertilizer. Potassium is an indispensable element for vegetables to bloom and bear fruit. Many people also have the misconception of applying too little potassium fertilizer when planting, so everyone should also pay more attention.
The above is a brief introduction to the misconceptions about fertilizing greenhouse vegetables. That is all for today's introduction. This article is for reference only, and I hope it can help everyone!