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Fertilization method for controlling nitrate content of leafy vegetables

A technology of nitrate content and fertilization method, which is applied in the field of fertilization to control the nitrate content of leafy vegetables, achieves scientific theoretical basis, wide application value, and the effect of reducing the nitrate content of leafy vegetables

Inactive Publication Date: 2013-04-03
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of controlling and reducing the nitrate content by fertilization, especially the fertilization method to control the nitrate content of leafy vegetables from the perspective of reducing the vacuolar nitrate concentration, has not been reported in the literature at home and abroad.

Method used

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Embodiment 1

[0015] The technical solution of this embodiment is suitable for using leafy vegetables as raw materials. By controlling the amount of nitrogen fertilizer used, the nitrate content of the vacuoles can be controlled at a low level, while the yield is not significantly affected, and the purpose of reducing the nitrate content of leafy vegetables is achieved. .

[0016] In this embodiment, green vegetables are taken as an example, cultivated with different concentrations of Hoagland nutrient solutions, and the biomass of the planted leafy vegetables is measured. Plant a certain variety of green vegetables under field conditions, and fertilize the green vegetables with multiple nitrogen fertilization dosage schemes. The specific scheme is: take the conventional nitrogen fertilization level as 100%, and design 6 fertilization schemes, which are 100%, 100%, and 100% respectively. 95%, 90%, 85%, 80% and 75%, when the green vegetables planted are mature, take the roots of leafy vegeta...

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Abstract

The invention relates to a method of fertilizing leafy vegetables, in particular to a fertilization method for controlling nitrate content of the leafy vegetable. The method comprises the following steps: in a large field, designing fertilization schemes with different nitrogen fertilizer dosages for different planted leafy vegetables to fertilize the vegetables; taking the root of the planted mature leafy vegetables to place into buffer solution, adopting double-orifice nitrate ion selectivity electrodes to respectively insert into the cytoplasm and the vacuole of epidermis cells of the root, and detecting the nitrate content in the cytoplasm and the vacuole; choosing the fertilization scheme with the nitrogen fertilizer dosage corresponding to the treatment of the nitrate concentration of 60-70mmol / L in the cell vacuole of the root. The fertilizing method adopted in the invention can not only guarantee no obvious reduction of the biomass of the leafy vegetables, but also control the nitrate content in the leafy vegetables. The scheme provided by the invention is reliable, the operation is convenient, and the scheme has a scientific theoretical basis and a broad application value.

Description

technical field [0001] The invention relates to a fertilization method for leafy vegetables, in particular to a fertilization method for controlling the nitrate content of leafy vegetables. Background technique [0002] Reducing the nitrate content of leafy vegetables can improve nitrogen use efficiency, reduce fertilizer costs, reduce non-point source pollution of nitrogen fertilizers, and reduce residents' intake of nitrate. The nitrate absorbed by plants mainly exists in the cytoplasm and vacuole of the plant. The nitrate in the cytoplasm mainly plays a role in metabolism, and its concentration must be kept stable; the nitrate in the vacuole mainly plays a storage role, and it is transferred from the vacuole once the cytoplasm is needed. Therefore, The concentration in the vacuole can vary considerably. Because the vacuole volume is much larger than the cytoplasm, and the nitrate concentration in the vacuole is much higher than that in the cytoplasm, the nitrate concentr...

Claims

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Application Information

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IPC IPC(8): A01C21/00A01G1/00G01N27/333
Inventor 王波陆小平刘刊商海燕
Owner SUZHOU UNIV