A detailed explanation of the fertilizer requirements of spinach: master the key points for scientific fertilization
Spinach is a very common vegetable in our daily lives. It also has a large planting area in China, and when growing spinach, some basic management work is very important. Fertilization in particular: rational fertilization is a key measure for providing spinach with the nutrients it needs for growth. Before fertilizing spinach, we must first fully understand its fertilizer requirements. So what exactly are the fertilizer requirements of spinach? Let's take a look below!
1. Fertilizer demand
Spinach is a vegetable that grows relatively quickly. Its growing period is not very long, but it has a relatively large yield. Therefore, during the spinach growing period, the demand for fertilizer is still relatively large, especially nitrogen fertilizer. Only sufficient fertilizer can meet the nutrients needed for spinach's growth. According to professional data surveys, when growing spinach, every 1000 kg of yield requires about 2.5 kg of pure nitrogen. Among these, the demand for potassium chloride is even greater, reaching 5.3 kg, and finally phosphorus pentoxide, which also requires about 0.9 kg.
2. Nitrogen, phosphorus and potassium requirements
Based on spinach's preference for nitrogen fertilizer type, application rate and fertilization timing during growth, spinach favors nitrate nitrogen fertilizer. The application rate of nitrate nitrogen should be about one cup higher than that of ammonium nitrogen. Ammonium nitrogen alone must not be used, otherwise it will affect spinach's absorption of phosphorus and potassium fertilizers, leading to stunted growth. Likewise, nitrate nitrogen alone must not be used either. Even though nitrate nitrogen alone can ensure spinach's growth, spinach will consume a large amount of energy when reducing it. And if there is insufficient light, it will also inhibit spinach's absorption of nitrate nitrogen, resulting in too little nitrogen supply.
Applying phosphate fertilizer basically does not affect the nitrate in spinach, but while increasing spinach yield, it can appropriately reduce the nitrate content. Potassium has the effect of inhibiting nitrate reduction, and increasing the amount of potassium fertilizer can increase the nitrate content and yield of spinach. However, when applying potassium chloride, the nitrate content in spinach is lower than with potassium sulfate. If the content of available phosphorus in the soil is high, it is very beneficial to spinach yield. Therefore, appropriately increasing the application of phosphorus and potassium fertilizers can effectively increase spinach yield.
3. Trace elements
When applying nitrogen, phosphorus and potassium, we must also pay attention to supplementing spinach's trace elements. Although trace elements such as sodium, calcium and magnesium will not affect the nitrate content in spinach, appropriately applying lime can not only reduce the nitrate content in spinach, but also increase spinach yield. If the soil lacks molybdenum, then appropriately applying molybdenum fertilizer can effectively reduce the nitrate content. And if it lacks elements such as manganese and copper, then it will affect spinach yield and cause the nitrate content to increase.
The above is a brief introduction to the fertilizer requirements of spinach. That is all for today's introduction. This article is for reference only, and we hope it can help everyone!