Hydroponic crop nitrogen fertilizer management method and hydroponic crop nitrogen fertilizer management device

A nitrogen fertilizer and hydroponics technology, applied in botany equipment and methods, cultivation, soilless cultivation, etc., can solve problems such as endangering human health, deterioration of vegetable quality, and reduction of nitrogen fertilizer use efficiency, and achieve quality improvement and precise automatic management. Effect

Active Publication Date: 2018-12-28
BEIJING RES CENT OF INTELLIGENT EQUIP FOR AGRI
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Problems solved by technology

This has led to a large amount of nitrogen fertilizer being absorbed in luxury and enriched in the crop body in the form of nitrate, which not only causes the quality of vegetables to deteriorate and endangers human health, but also reduces the use efficiency of nitrogen fertilizer

Method used

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  • Hydroponic crop nitrogen fertilizer management method and hydroponic crop nitrogen fertilizer management device
  • Hydroponic crop nitrogen fertilizer management method and hydroponic crop nitrogen fertilizer management device
  • Hydroponic crop nitrogen fertilizer management method and hydroponic crop nitrogen fertilizer management device

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Embodiment Construction

[0027] The specific implementation manners of the embodiments of the present invention will be further described in detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the embodiments of the present invention, but are not intended to limit the scope of the embodiments of the present invention.

[0028] At present, the decision-making object of nutrient liquid nitrogen concentration management in vegetable hydroponic production is mostly the nitrogen concentration in the nutrient solution, that is, the nutrient liquid nitrogen concentration is controlled within an appropriate concentration range to ensure the nutrient requirements of crops. This has led to a large amount of nitrogen fertilizer being enriched in the crop body in the form of nitrate through extravagant absorption, which not only deteriorates the quality of vegetables and endangers human health, but also reduces the use efficiency of nitrogen fertilizer. In ...

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Abstract

The invention provides a hydroponic crop nitrogen fertilizer management method and a hydroponic crop nitrogen fertilizer management device and belongs to the technical field of crop culture. The method includes determining the nitrogen absorption amount and the root nitrogen content of a hydroponic crop within a preset time period; determining the canopy plant biomass of the hydroponic crop according to the nitrogen absorption amount, the root nitrogen content and the actual nitrogen concentration of the hydroponic crop canopy; acquiring a relative trophic state index of nitrogen correspondingto the canopy plant biomass on the basis of an optimum nitrogen concentration curve mode of the hydroponic crop; judging the nitrogen fertilizer supply state of the hydroponic crop according to the relative trophic state index of the nitrogen, and regulating the nitrogen fertilizer concentration in a nutrient solution on the basis of the nitrogen fertilizer supply state. The hydroponic crop nitrogen fertilizer management method has the advantages that precision automated management of a hydroponic crop nitrogen fertilizer production process can be achieved based on actual nutrient requirements of the hydroponic crop, so that the high yield of the hydroponic crop is guaranteed, the nitrate content of the hydroponic crop can be controlled, and the quality of the hydroponic crop can be improved.

Description

technical field [0001] The invention relates to the technical field of crop cultivation, and more specifically, to a nitrogen fertilizer management method and device for hydroponic crops. Background technique [0002] Hydroponic crop production uses nutrient solution instead of soil or artificial substrate to produce various vegetables, which gets rid of the restriction of solid cultivation medium on vegetable production. While nutrient solution provides growth space for crop root system, the components and characteristics can be adjusted in time according to crop needs. Create a suitable rhizosphere environment for crop growth and avoid vegetables from being affected by nutrient, salinity and temperature stress. Compared with soil or solid artificial medium cultivation, nutrient solution cultivation avoids the cultivation of land and the replacement of solid cultivation medium in the process of stubble inversion or multiple cropping, and only needs to sterilize the nutrient...

Claims

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Application Information

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IPC IPC(8): A01G31/00A01G31/02G06Q50/02
CPCA01G31/00A01G31/02G06Q50/02Y02P60/21
Inventor 王利春郭文忠李友丽陈红陈晓丽赵倩
Owner BEIJING RES CENT OF INTELLIGENT EQUIP FOR AGRI
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