Due to the special environment of greenhouse cultivation, greenhouse soil and exposed soil still have some differences. Through the measurement of soil moisture meter, it is found that the soil water content in greenhouse soil is not the same as that in open soil, and the change rule of greenhouse soil moisture is mainly The following features are exhibited.
1. In general, the greenhouse soil moisture mainly depends on the storage of natural precipitation in the soil during the relaxation period and post-buckling membrane artificial irrigation. The soil water consumption is mainly ground evaporation and crop evapotranspiration. In the early stage of each crop, evaporation is the main factor, and in the later period, the transpiration is greater than evaporation. The measurement of the soil moisture meter found that the sunlight greenhouse produces less water than the exposed land.
2. In the case of less air release during the winter, the contact of water vapor with cold film will condense into water mist on the inner surface and accumulate into water droplets. Water mist and water droplets will continue to evaporate into the air or drip off the ground, creating a small water cycle. Because water droplets tend to fall into a relatively fixed place, resulting in uneven soil water seals, this condition is most pronounced when water is rarely or not watered in winter.
3. The soil covered by the capillary mainly transports the deep soil moisture to the soil surface. In the case of high air humidity, the surface soil absorbs moisture from the air and receives moisture from the deep soil. Therefore, it becomes muddy and gives people the impression that there is no shortage of water. Therefore, in order to ensure the water demand of greenhouse crops, The soil moisture meter should also be used for accurate determination.
The above is the change rule of greenhouse soil moisture analyzed by the soil moisture measuring instrument. In the modern intelligent greenhouse production, in order to understand the soil moisture content in real time, most of them use the soil moisture sensor to measure, which is for crop water demand. The timely replenishment and precision irrigation are of positive practical significance. In the open field production, with the aid of a soil moisture measuring instrument, similar results can be achieved.

Tape Edge Machine

Automatic mattress tape edge machine is mainly used for mattress tape sewing. The main advance is
sewing head need not moving, but the lifting machine can turn angles to sew mattress
of different thickness. It is equipped with Singer-300U chain sewing head and
microcomputer controlling system imported from America. When producing, the
conveyer can move forward, backward, turning 90 degrees or 180 degrees to sew the
whole mattress automatically.

Semi automatic mattress tape edge machine its working table is adopted high-strength independent bearing, stable
working condition, motor upper and down the height of worktable. The rotary power supply
is assembled in the machine. It is equipped with Singer-300U chain sewing head and
microcomputer controlling system imported from America. It may change walking carriage`s
turning speed automatically, which make mattress sewing operation more convenient, fast
and the finished turn-flange more beautiful.

Tape Edge Machine,Mattress Tape Edge Machine,Mattress Tape Edge Sewing Machine,Automatic Mattress Tape Edge Machine

SOFTLIFE MATTRESS MACHINERY CO.,LTD , https://www.machinesoftlifefoam.com