Field management tips for autumn spinach to overwinter safely
Autumn spinach is a overwintering vegetable sown in autumn and harvested in spring. It generally begins overwintering at the end of November and turns green again in early March of the following year, lasting more than 100 days. Therefore, under long-term low-temperature conditions, how to ensure that spinach overwinters safely is the key to achieving a high yield. So how should autumn spinach be managed during overwintering? Let's find out together.
1. Water the freezing water well
When watering autumn spinach with freezing water, you must achieve "one certainty" and "two suitability". One certainty means deciding whether to water the freezing water according to how much water the soil contains. Generally, when the water content of sandy loam is below 15%, loam below 17%, and clay below 20%, freezing water should be watered. Two suitability means watering the freezing water at the right time and in the right amount. The time for watering the freezing water should be when the soil plough layer can thaw during the day and freezes at night. Watering in the right amount also means the amount of freezing water should not be too much or too little, and it is suitable to connect with the subsoil moisture.
2. Apply overwintering fertilizer well
Topdressing overwintering fertilizer can increase the nutrient content of the soil, play the role of using winter fertilizer in spring, and promote weak plants to become strong. It is especially important for vegetable plots with little base fertilizer, poor soil fertility, and weak seedling growth. Therefore, overwintering fertilizer should be applied together with the freezing water. Generally, 10 kg of urea or 20 kg of ammonium sulfate is applied per mu, applied with the water.
3. Cover with materials to protect against cold
In the severe cold period in northern regions, low temperatures are extremely unfavorable for spinach seedlings during overwintering, so measures of covering with materials to protect against cold should be adopted to increase ground temperature and ensure the seedlings overwinter safely. Covering can generally be carried out after the soil of the plough layer is completely frozen. The covering material can be farmyard manure rich in organic matter and crushed and finely broken, and about 1000 kg per mu can be scattered.
The above is an introduction to the tips for autumn spinach to overwinter safely. We hope it can help you. To learn more related knowledge, please follow us.