Cover leaves or crop stalks
If there is no plant ash or sawdust available at home, you can also use crop straws or leaves to keep the vegetables warm and keep out the cold. Available crop straws are mainly rice straw, wheat straw, corn straw, etc. If there is no crop straw at home, you can also collect some leaves as warm and cold-proof materials for garden vegetables; The process of using crop straws or leaves to keep the vegetables warm and keep out the cold is very simple, that is, take a proper amount of crop straws or leaves and directly sprinkle them on the ridge surface of the vegetables in the garden, so that the vegetables can be covered tightly by the crop straws or leaves; The covering thickness should be determined according to the local cold degree in winter and the vegetable varieties in the garden. For example, winter spinach, coriander, small vegetables, black vegetables, etc. planted in the garden can keep warm and keep out the cold by spraying crop straw with a thickness of 10 cm; However, straw or leaves with a thickness of more than 15 cm can be spread on the root border of overwintering leek to enhance the ground temperature; In addition, felt, grass felt and waste plastic paper can also be used as warm and cold-proof materials for garden vegetables.
Sprinkle sawdust
Spreading sawdust between vegetable ridges is also one of the main ways to keep vegetables warm and keep out the cold. In the past, older vegetable farmers often used this method to help vegetables in vegetable gardens survive the winter safely. Sawdust is a powdery granular material left after wood division. When sawdust is piled up together, it can generate heat energy and enhance the ground temperature. When sawdust is spread between vegetable ridges, the accumulated sawdust can prevent the ground temperature from falling too fast and form the phenomenon of freezing damage to roots; Moreover, the vegetable stems and leaves are surrounded by sawdust, which can prevent the vegetable stems and leaves from directly contacting with ice and snow, prevent the vegetable stems and leaves from freezing and damaging cell tissues by ice and snow, and effectively prevent the vegetables from freezing to death by cold wave or ice and snow.
Moreover, sawdust can be fermented and hummed under natural conditions, which can provide rich and comprehensive humus organic matter for vegetables and provide nutritional support for vegetables to turn green and grow sturdily in the coming year; Some people will worry that sawdust will generate excessive decay heat during the accumulation process; In fact, don't worry, sawdust can only produce a lot of decay heat in a high-temperature sealed environment; In the winter natural environment, its humification speed is quite slow, and it will not form high accumulated heat; Therefore, there is no need to worry that sawdust will burn vegetables when spread around them in winter.