How to fertilize lettuce

Lettuce is a common vegetable in our life, its stem can be fried or cold, taste crisp, nutritious, leaves can also be eaten, also known as lettuce. To grow lettuce well, the important point is to fertilize, so how to fertilize lettuce? Let's take a look.

1. Characteristics of fertilizer requirements

lettuce needs more than a dozen elements to grow, of which the most common are nitrogen, phosphorus and potassium, and the largest demand for potassium. According to research, for every 1000 kg of lettuce produced, it needs to consume 4.5 kg of potassium. It has low requirements for fertilizer during its seedling stage, and as it grows, its demand for fertilizer increases. In the heading stage of lettuce is the period of maximum fertilizer demand, this period for nitrogen demand accounted for more than 80% of the whole growth period.

2. Principles of fertilization

lettuce needs a lot of elements, so in order to avoid the occurrence of deficiency disease, it is necessary to increase the application of organic fertilizer to provide growth needs, at the same time to control nitrogen fertilizer, so as not to apply excessive nitrogen fertilizer, affecting the absorption of other elements by the roots, and increase the application of potassium fertilizer. Fertilization is mainly based on base fertilizer and appropriate topdressing. Topdressing is mainly nitrogen fertilizer and reasonable combination of phosphorus and potassium fertilizer. Fertilization combined with water management can improve the utilization rate of fertilizer, accelerate the absorption by roots and promote growth.

3. Fertilization suggestions

Base fertilizer is generally applied to 1000-1500 kg of decomposed farm manure per mu, and later topdressing should be carried out according to the yield per mu. For fields with a yield of more than 3500 kg per mu, 10-12 kg of nitrogen fertilizer, 4-6 kg of phosphorus fertilizer and 10-14 kg of potassium fertilizer shall be applied per mu; for fields with a yield of 2500-3500 kg per mu, 6-10 kg of nitrogen fertilizer, 3-4 kg of phosphorus fertilizer and 8-10 kg of potassium fertilizer shall be applied per mu. According to this proportion, with the decline of yield per mu, gradually reduce the amount of nitrogen, phosphorus and potassium fertilizer.

4. Precautions

When fertilizing, it should be noted that the acid resistance of lettuce is poor, so try to use less acidic fertilizer when fertilizing. When the soil pH value is lower than 6, it should be adjusted by 150-200 kg of quicklime per mu. Nitrogen fertilizer should be applied as top dressing, generally divided into three stages, potassium fertilizer is generally used as base fertilizer, the rest is applied twice, and phosphorus fertilizer is all used as base fertilizer.

The above is how lettuce fertilization introduction, hope to help you, want to know more related knowledge, please pay attention to us.