Apparatus and method for detecting solubility values of chemical fertilizer

Abstract

The invention relates to an apparatus for detecting the solubility values of a chemical fertilizer. The apparatus comprises an accommodating tank, containers, a controller, a thermotank, a liquid suction device, a temperature sensor, a pH sensor and weighing devices. A method for detecting the solubility values of the chemical fertilizer comprises the following steps: placing the accommodating tank containing a saturated fertilizer liquid in the thermotank, and heating the saturated fertilizer liquid in the accommodating tank to a preset temperature; automatically recording the pH value and the measured values m0 of the weighing devices when the temperature sensor displays the preset temperature and the pH sensor does not change, sucking the saturated fertilizer liquid into the containers,and automatically recording the measured values m1 of the weighing devices; moving the containers into the thermotank, heating and drying the containers, and recording the masses m2 of the containers; and calculating the solubility values of the fertilizer liquid according to the following formula: S1 = (m2 - m0)100 / (m1 - m2)(m1 - m2). The solubility values of the chemical fertilizer in differentwater sources at different temperatures under different acid-base conditions can be detected.

Description

technical field [0001] The invention relates to the field of agricultural irrigation, in particular to a chemical fertilizer solubility testing device and method. Background technique [0002] In the integrated technology of agricultural water and fertilizer, fertilizers need to be dissolved in irrigation water to supplement water and nutrients to crops. There are four main factors affecting fertilizer solubility: (1) water temperature; (2) acidity and alkalinity of water; (3) pressure; (4) type of fertilizer. Due to different water source conditions, after dissolving the same amount of fertilizer, the acidity and alkalinity of the fertilizer solution are very different, and the effects on crops are also different. Even with the same water source conditions, due to different irrigation times and water temperatures, the effects on fertilizer solubility are also different. However, the solubility of fertilizers that we usually know is a characteristic parameter under specifi...

AI Technical Summary

Problems solved by technology

At present, the methods for measuring the solubility of solids mainly include the equilibrium method and the dynamic method. The measurement principle is simple, but the measurement process is cumbersome, and the temperature is not suitable for control. The measured solubility is quite different from the production requirement.

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