Apparatus for rapid leaching and real time pretreatment of fertilizer nitrogen nutrient soil column

Abstract

The invention discloses an apparatus for rapid leaching and real time pretreatment of a fertilizer nitrogen nutrient soil column. The apparatus comprises a leaching system and a pretreatment system, and the leaching system is provided with a water storage tank, a first peristaltic pump and a leaching pipe which are arranged along a flowing direction of leaching liquid in order; a leaching pipe islocated in a leaching support, the upper end is provided with a water inlet, the water inlet is connected with the first peristaltic pump which is outside the leaching support, the lower end is provided with a water outlet, and the water outlet is connected with a pretreatment system; the pretreatment system is positioned below the leaching system, and is provided with a sampler, a dilution pool,a mixer and a decoloration reaction filter funnel; the sampler has a three-way pipe joint and is separately connected with one end of the leaching system, one end of the dilution pool, and one end ofthe mixer, and the other ends of the dilution pool and the mixer are respectively connected with a first pool for a nitrogen nutrient to be measured and the decoloration reaction filter funnel which is connected with a second pool for nitrogen nutrient to be measured. The apparatus is advantageous in that problems of too long time consuming and complicated treatment of leaching liquid of traditional fertilizer soil column leaching methods are overcome, and efficiency and repeatability of leaching are improved.

Description

technical field [0001] The invention relates to the field of soil agrochemicals, in particular to a rapid leaching and real-time pretreatment device for fertilizer nitrogen nutrient soil column. Background technique [0002] Studies have shown that about 30%-50% of the fertilizers applied to the soil in my country enter the groundwater through soil leaching, which not only wastes a lot of agricultural resources, thereby increasing the cost of agricultural production, but more importantly, a large amount of lost nitrogen, Phosphorus poses a serious threat to water resources and aquatic ecosystems. On the other hand, in order to ensure national food security, chemical fertilizers, as food in food, will have to continue to be used for a long period of time in the future. Under the dual pressure of the environment and production, it has become an urgent task for my country's agriculture to vigorously develop, promote and apply environmentally friendly and efficient slow-release ...

AI Technical Summary

Problems solved by technology

At present, there are many methods for evaluating the leaching of chemical fertilizer soil columns, but none of them can avoid the problems of long leaching time and poor repeatability caused by the slow water flow and complex structure of the soil. In addition, the nutrient determination of the leaching solution usually requires sampling, Multiple procedures such as dilution, constant volume, color development, and cleaning are time-consuming and labor-intensive. Data errors and accuracy are greatly affected by manual operations, and the detection points taken are limited, which cannot fully reflect the process of nutrient dissolution.

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