There is a coup in the greenhouse sweeping snow

When it is snowing, if the cleaning is not timely, the snow on the shed will accumulate more and more, and the pressure on the shed will become larger and larger, which will often lead to the collapse of the shed. Every year, countless sheds that have been crushed or damaged by heavy snow have caused significant losses to the safe production of vegetables.

Shed room sweeping snow

Snow-sweeping work is also a matter of learning, whether it is using a snow blower or a manual snow sweeper. Specifically, the ice-breaking point should be used as a demarcation point. Pay attention to the following three points:

If there is less snowfall when there is no ice, or snowfall when the temperature is low, there will be no ice formation. In this case, the snow should be cleaned in time. When the snowfall is large, it should be cleaned while snowing to prevent snow from falling. Thick collapsed greenhouse. Cleaning the snow can not only prevent the shed from being crushed, but also prevent the snow from melting again after melting, so as to avoid the inconvenience of sweeping the snow and rolling up the floating film. At the same time, the snow around the shed should be removed in time, and the ditch should be drained to prevent snow damage.

After melting the ice, the surface of the floating film is frozen due to the melting of the snow. When the snow is low, the temperature of the sun can be increased, and the ice is melted and then cleaned. For the case of large snowfall, it is best to clean the upper middle layer first. Snow is accumulated to relieve part of the pressure in the chamber, and then the previous cleaning work is repeated.

When sweeping snow, from the bottom to the top, when cleaning the snow, you can't push the snow from top to bottom. This will cause the snow at the front end of the greenhouse to not fall down in time, resulting in excessive burden and collapse in severe cases. Therefore, the vegetable farmers should first clean the lower part of the shed when sweeping the snow, and then sweep down from the upper part, so as to prevent the pressure on the front face of the shed from collapsing.

Insulation is aired

Rainfall and snowfall have increased, and many greenhouses have failed to cover the floating film in time or the protective measures are not in place, resulting in water ingress. After the cold weather, when the weather is fine, many vegetable farmers will start to dry the grass or heat insulation, and some will start to dry at 9:00 in the morning, and the entire shed will be covered with insulation for drying. In fact, the drying time and method are There is a misunderstanding.

First of all, the drying time is not right. In the interview, the author found that many vegetable farmers began to put down the cover at 9 o'clock in the morning to dry, this time is just the stage where the photosynthetic efficiency of vegetables began to rise. Drying at this time point undoubtedly affected photosynthesis. Reduced storage of photosynthetic products. In fine weather, around 12:30, the illuminance is generally between 50,000 and 60,000 lux. It is close to the vegetable light saturation point and the photosynthetic rate increases little. Then, you can choose to air between 12 and 13 hours.

Secondly, the drying method does not dry the whole shed straw or heat preservation, and shortens the light receiving time of vegetables, which is unfavorable for vegetable growth. At present, the cover of the greenhouse is mostly covered with grasshoppers and heat preservation. The artificially laid grass covers are mostly arranged in the form of “goods” or overlapping. When drying, it can be divided into two parts, first put a bed, pull Take a bed and let it dry. For the grasshopper and heat preservation quilt using the roller blind machine, since the lower end has been fixed on the roller bar of the roller blind machine, and the heat preservation is fixedly treated between the adjacent two beds, it is unrealistic to open the air drying, and the vegetable farmers It can be aired at noon, first put 1/3 to dry, then lower to 1/2, and the rest can be dried separately, and the daily operation can achieve the purpose of drying.