In order to ensure that there is no water deficit in jujube trees, the soil moisture of jujube trees needs to be in a relatively balanced state, so that the soil water added by irrigation and the soil water consumed by transpiration evaporation basically reach an equilibrium state. After irrigating, the increment rate of the soil moisture meter was 16.6%. The rate of increase was greater than the rate of decline, indicating that irrigation satisfies the need for soil moisture to subside, and soil water surplus is 6.52%. It shows that the soil moisture in the jujube growing areas is surplus, and there is no water deficit.
Jujube trees began to recover in April and entered the bud growth stage in mid-May to mid-June. The flowering stage began in mid-June-July, and the fruit setting period in August and the ripening period of red jujube in the middle of September to October. The total extinction rate of soil moisture was 74.58%, and the total increase rate of soil moisture by irrigation was 77.34%. The average increase of soil moisture was 15.5% after one irrigation. The soil moisture of the jujube tree in the growing season was in balance, and the water surplus was 2.76%. No water deficit occurred.
The role of irrigation is to provide adequate soil moisture for crop growth. When the irrigation is finished, the water is stored in the root soil layer of the crop, and the soil water is a gradually depleting process under the effects of plant transpiration and soil evaporation. Therefore, soil moisture analyzer analysis of the process of regression of soil moisture, to master the law of regression of soil moisture, for the scientific development of irrigation systems, has an important guiding role.
As
the name suggests, Diaphragm Metering Pump using a special design and
processing of flexible diaphragm instead of the piston, under the action
of the drive mechanism to achieve reciprocating motion, complete the
suction - discharge process. Due
to the segregation of the diaphragm, the isolation between the metering
fluid and the driving lubrication mechanism is realized in the
structure. High-tech structural design and the selection of new materials has
greatly improved the service life of the diaphragm, coupled with
excellent corrosion resistance of composite materials, diaphragm
metering pumps become the main application of fluid measurement pump
type.
In
the diaphragm-type Metering Pump family members, the hydraulic
diaphragm metering pump as a result of the use of hydraulic oil evenly
drive the diaphragm, to overcome the mechanical direct drive mode under
the pump diaphragm too concentrated shortcomings, to enhance the
diaphragm life and working pressure ceiling. In
order to overcome the single diaphragm metering pump may occur due to
damage caused by the diaphragm damage, and some metering pumps equipped
with a diaphragm breakage sensor to achieve the diaphragm when the
automatic chain protection; with double diaphragm structure of the pump
head to further improve its safety Sex, suitable for security protection is particularly sensitive to the application.
As a kind of diaphragm type metering pump, the electromagnetic driven
metering pump generates the pulsating driving force with the
electromagnet, which saves the motor and the speed change mechanism,
makes the system compact and compact, it is an important branch of the
small range low pressure metering pump.
Precision metering pump technology has been very mature, the fluid metering capacity of up to 0-100,000l / h, working pressure up to 4000bar, the scope of work covers all areas of industrial production requirements.
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Diaphragm Metering Pump
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