What are the latest control methods for stem splitting in celtuce
Celtuce is one of the most common vegetables in China, and its leaves can be eaten as lettuce. However, during the growth and development of celtuce, if management is improper, it can easily lead to stem splitting. Stem splitting has a great impact on both the yield and quality of celtuce. So how can stem splitting in celtuce be prevented and controlled? Let's take a look below.
1. Variety selection
Different celtuce varieties also differ in their susceptibility to stem splitting, so the variety should be chosen according to the growing environment and soil conditions. In areas with poor drainage and large temperature fluctuations, varieties with low water content and less stem splitting should be chosen, such as white-skin celtuce. In the opposite areas, high-yielding varieties can be chosen, such as purple-leaf celtuce.
2. Fertilizer and water management
During the seedling stage, celtuce grows relatively slowly and needs relatively little fertilizer, so water it once with dilute manure water after planting. Apply about 1000 kg of farmyard manure per mu, which can promote root growth and development. This prepares celtuce for expanding leaf area, stem swelling and accumulating nutrients, and field fertilizer and water should be well controlled. During the rosette stage, pay attention to applying additional chloride and potassium fertilizer. During the swelling stage, ensure the fertilizer and water needed by celtuce, because this stage has a very large demand for fertilizer and water; water immediately when it gets slightly dry, but do not overdo it, and keep it moderate. Remember not to water heavily after a period of drought, because this will further accelerate stem splitting.
3. Apply additional boron fertilizer
This boron fertilizer is different from fertilizer and water management, because it needs to be applied at a specific stage. When the heart leaves and outer leaves of celtuce are level, water lightly, then apply about 20 jin of quick-soluble fertilizer per mu, and spray more foliar fertilizer, but the fertilizer and water should be sprayed at the right time and in the right amount, otherwise it will be unfavorable to stem growth.
4. Temperature control
Generally, celtuce is grown in the open air, but when low-temperature weather occurs and lasts for a period of time, a shed should be built to keep celtuce warm, and the shed can be removed once the temperature reaches about 20 degrees. Try to control the temperature well during the growth period of celtuce, and it is best to keep the temperature difference fluctuation at about 2 degrees, so that celtuce grows in a temperature suitable for its growth.
5. Field management
Pay attention to checking the condition of celtuce in the field. Diseased plants infected with disease should be handled in time, and weeds in the garden should be noted. Gather them and burn them to prevent or reduce the incidence of pests and diseases. Fertilization should be stopped half a month before harvest, watering should be appropriately reduced, and the harvest time can be determined according to the actual situation and the market.
The above are several preventive and control measures for stem splitting in celtuce. The main point is still to control the amount of fertilizer and water used for celtuce. Many friends do not pay much attention to stem splitting, but in relatively serious cases it may harm the entire mu of crops. Stem splitting not only affects quality but also has a great impact on yield, so when stem splitting occurs, attention should be paid to it.