SU1220585A1 - Apparatus for determining water-spply of plants - Google Patents

Description

The invention relates to agriculture, in particular, to devices for determining the moisture supply of plants.

The purpose of the invention is to improve the accuracy of determining the moisture availability of plants. ,

The drawing shows a device for determining the moisture availability of plants.

The device contains a sensor 1 of water soil of the soil with a converter 2, a sensor 3 of the water potential of air with

the divider 7 from the calculator 6 is given the value of the real gradient of the air-soil water potential (B).

In the operational divider 7, a ratio is calculated. 10, the value of which is applied to indicator 5, graduated in%.

It was established that the photosynthesis-optimal value of the air-soil C gradient of water for plant with a curator 4, indicator 5, calculator-Ruza is equal to 63.2 J / kg, which corresponds to torus 6, operational divider 7, block 8 values of air water potential memory tta -5.83.10 J / kg and water potential

The device works as follows. soil fj -69 joule / kg. In memory block 8, they are pre-entered to determine the moisture content in

gradient values of water potential

field conditions, a sensor 3 of the water potential of the air near the top sheet of the plant was installed. At a depth of 60 cm in the zone of greatest density of roots, a sensor 1 of the water potential of the soil was installed — the tensiometer AM-20-P. Sensors 1

spirit-soil, previously obtained experimentally for optimal conditions for photosynthesis. At the same time, sensors 3 and 1 respectively measure the water potential of the air in close proximity to the upper 15

field conditions, a sensor 3 of the water potential of the air near the top sheet of the plant was installed. At a depth of 60 cm in the zone of greatest density of roots, a sensor 1 of the water potential of the soil was installed — the tensiometer AM-20-P. Sensors 1

The plant leaf and the water potential of 20 and 3 are connected to the measuring soil transformations in the zone of the greatest density of the roots. The received signals from sensors 3 and 1 in measurement transducers 4 and 2 are converted into electrical signals proportional to

water potentials of air and soil. Recipients 4 and 2 signals are fed to micrometers of transducers 4 and 2 rock calculator 6. In microcalculator 6

bodies 2 and 4, respectively, the electrical signals at the output of which are proportional to the values of water potentials of air and soil, for example J / kg, Tj) g - 2.4-10 J / kg. From the outputs of the converter

associated with the input of calculator 6, in which the air-to-soil water potential gradient is calculated for actual conditions (B). Calculator 6 is associated with memory block 8 and operational divider 7. The trigger signal, issued by calculator 6, from memory block 8, the value of water-air gradient for the potential for photosynthetic conditions (C) is inputted to operational divider 7. . Single, temporarily to the second entrance of the operating room

Calculations of the gradient of the water potential of the air-soil (B) are made automatically using the formula B fa-10 - ij;), -12.4-- (-69) 56.6 J / kg. The value B is fed to the operational divider 7, to the second input of which from the memory block 8 a value, 2 J / kg, is applied. In the operational divider, the value of A is calculated by the formula. . (%) Thus, they increase the accuracy of determining the moisture supply of plants.

the divider 7 from the calculator 6 is given the value of the real gradient of the air-soil water potential (B).

In the operational divider 7, a ratio is calculated. 10, the value of which is applied to indicator 5, graduated in%.

soil fj -69 joule / kg. To determine the moisture content in

field conditions, a sensor 3 of the water potential of the air near the top sheet of the plant was installed. At a depth of 60 cm in the zone of greatest density of roots, a sensor 1 of the water potential of the soil was installed — the tensiometer AM-20-P. Sensors 1

and 3 are connected to the measuring transducers 4 and 2 signals are fed to the microcalculator 6. In the microcalculator 6

bodies 2 and 4, respectively, the electrical signals at the output of which are proportional to the values of water potentials of air and soil, for example J / kg, Tj) g - 2.4-10 J / kg. From the outputs of the transform

Calculations of the gradient of the water potential of the air-soil (B) are made automatically using the formula B fa-10 - ij;), -12.4-- (-69) 56.6 J / kg. The value B is fed to the operational divider 7, to the second input of which from the memory block 8 a value, 2 J / kg, is applied. In the operational divider, the value of A is calculated by the formula. . (%) Thus, they increase the accuracy of determining the moisture supply of plants.

Claims (1)

DEVICE FOR DETERMINING THE WATER SECURITY OF PLANTS, containing a soil water potential sensor with a transducer, an air water potential sensor with a transducer, an indicator, characterized in that, in order to improve the accuracy of determining the moisture supply of plants, the device is equipped with a calculator, operational divider, memory unit, while the outputs of the converters are connected with the inputs of the calculator, one output of which is connected to the input of the operational divider, and the other output is connected to the input of the memory block.