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CN-122004116-A - Planting method of hydroponic lettuce

CN122004116ACN 122004116 ACN122004116 ACN 122004116ACN-122004116-A

Abstract

The invention provides a planting method of hydroponic lettuce, and relates to the technical field of vegetable cultivation. According to the planting method of the hydroponic lettuce, after the planting hydroponic of the seedlings of the lettuce, the combination artificial light source with the red-blue light ratio of (3-7) 1 is adopted for irradiation, and the EC value of the nutrient solution after the planting to before harvesting is 0.8-1.5 mS/cm. According to the planting method of the water-cultured lettuce, after the lettuce seedlings are subjected to field planting water culture, the red and blue light quality regulation and the nutrient solution concentration adjustment are added, so that a water-cultured lettuce growth synergistic system is constructed, a growth system is optimized, the high-quality growth of the water-cultured lettuce is realized, the synthesis of secondary metabolites is stimulated, flavor substances are accumulated, the vitamin content is improved, the nitrate content is reduced, the lettuce quality is improved, the calcium content is improved, the transpiration effect is enhanced, and the problem of edge burning is effectively solved.

Inventors

  • WU YAHONG
  • KANG XINNA
  • ZHOU YANWEI
  • ZHANG YONG
  • SUN FANG

Assignees

  • 石家庄市农林科学研究院

Dates

Publication Date
20260512
Application Date
20260209

Claims (10)

  1. 1. A planting method of water-cultured lettuce is characterized in that after planting water-cultured raw lettuce seedlings, a combined artificial light source with the red-blue light ratio of (3-7): 1 is adopted to irradiate the lettuce seedlings; The EC value of the nutrient solution for water planting after field planting and before harvesting is 0.8-1.5 mS/cm.
  2. 2. The method for planting lettuce in water according to claim 1, wherein after planting and water planting of the lettuce seedlings, the lettuce seedlings are irradiated by a combined artificial light source with the red-blue light ratio of (3-5): 1.
  3. 3. The method for planting hydroponic lettuce according to claim 2, wherein the EC value of the nutrient solution after the planting to before harvesting is 1.2-1.5 ms/cm.
  4. 4. The method for planting lettuce in water according to claim 1, wherein after planting and water planting of the raw vegetable seedlings, the raw vegetable seedlings are irradiated by a combined artificial light source with the red-blue light ratio of (5-7): 1.
  5. 5. The method for planting lettuce in hydroponics according to any one of claims 1 to 4, wherein the EC value of the nutrient solution is regulated in stages from 3 days after the field planting to before the harvesting, the EC value of the nutrient solution is 0.8 to 1.0ms/cm, and the EC value of the nutrient solution is 1.2 mS/cm to 1.5 mS/cm in the growing period.
  6. 6. The method for planting lettuce in hydroponics according to any one of claims 1 to 5, wherein the pH of the nutrient solution is between 6.0 and 6.5.
  7. 7. The method for planting lettuce in water according to any one of claims 1 to 6, wherein the temperature condition of planting the lettuce seedlings is that the temperature is controlled to be 20-25 ℃ in the daytime, 14-18 ℃ in the nighttime and 15-22 ℃ in the nutrient solution.
  8. 8. The method for planting lettuce in water according to any one of claims 1 to 7, wherein the humidity condition of the lettuce seedlings in field planting water is that the air humidity is controlled to be 60% -80%.
  9. 9. The method for planting lettuce in water according to any one of claims 1 to 8, wherein the illumination condition of the lettuce seedlings for field planting and water planting is that a combined artificial light source with the red-blue light ratio of (3 to 5): 1 is adopted for irradiation for more than 8 hours in the cultivation environment of a plant factory; and/or, in addition to natural light every day in the environment of precise greenhouse cultivation, adding a combined artificial light source with the red and blue light ratio of (3-5): 1 to irradiate for more than 3 hours.
  10. 10. The method for planting hydroponic lettuce according to any one of the claims 1 to 9, characterized in that the planting is performed when the seedlings grow to 2 to 3 true leaves.

Description

Planting method of hydroponic lettuce Technical Field The invention relates to the technical field of vegetable cultivation, in particular to a planting method of hydroponic lettuce. Background The water planting lettuce is an agricultural planting mode which is highly dependent on technology, and the water planting lettuce production process comprises the steps of variety selection, seedling raising, field planting, management after field planting, harvesting and the like. The variety is generally selected from the varieties with strong stress resistance, strong growth vigor and bolting resistance, the seedling is selected from the matrix seedling and the sponge seedling, and the field planting is carried out when the seedlings grow to 3-4 true leaves. The conventional water culture lettuce management has common problems that the flavor and taste of the water culture vegetables are possibly inferior to those of soil culture, microorganisms and complex mineral components in the soil are helpful for synthesizing unique aromatic substances, the pure water culture environment lacks the special aromatic substances and has high growth speed, so that the nutrition substances, the flavor and the like of the lettuce are relatively light. Secondly, the problem of edge burning easily occurs in some varieties due to high environmental humidity, excessively high growth speed and the like in water culture. The prior art CN108849451A discloses a method for improving the quality of water-cultivated lettuce, after field planting water cultivation is carried out on raw vegetable seedlings, an artificial light source except for 1.2-2.2 and 1.6 of red and blue light proportion is adopted for irradiation, and when the harvesting standard is 70% -90%, the illumination intensity is enhanced by 20% -40%. The method improves lettuce quality mainly by enhancing illumination intensity and reducing the content of potassium element in a single water culture nutrient solution, does not solve the problem of 'edge burning' which is easy to occur in water culture lettuce, and has limited comprehensive lettuce quality improving effect. Disclosure of Invention Aiming at the defects and defects that the current water planting lettuce is easy to cause the problem of edge burning and the overall quality is poor, the invention provides a planting method of the water planting lettuce, which improves the quality of the water planting lettuce through the synergistic effect of light quality regulation and nutrition supply and simultaneously effectively solves the problem of edge burning. In the first aspect, the invention particularly provides a planting method of hydroponic lettuce, which comprises the steps of performing field planting hydroponic on raw vegetable seedlings, and irradiating by adopting a combined artificial light source with the red-blue light ratio of (3-7): 1; the EC value of the nutrient solution after field planting and before harvesting is 0.8-1.5 mS/cm. According to the method for planting the lettuce in the water, preferably, after planting and water planting of the seedling of the lettuce, the seedling is irradiated by adopting a combined artificial light source with the red-blue light ratio of (3-5): 1. According to the method for planting the hydroponic lettuce, which is protected by the invention, preferably, the EC value of the nutrient solution from the fixed planting to the harvesting is 1.2-1.5 mS/cm. According to the method for planting the lettuce in the water, preferably, after planting and water planting of the seedling of the lettuce, the seedling is irradiated by adopting a combined artificial light source with the red and blue light ratio of (3-5): 1, and the EC value of the nutrient solution after planting and before harvesting is 1.2mS/cm. According to the method for planting the lettuce in the water, preferably, after planting and water planting of the raw vegetable seedlings, the planting and water planting are carried out, the combination artificial light source with the ratio of red light to blue light of 3:1 is adopted for irradiation, and the EC value of nutrient solution after planting and before harvesting is 1.2mS/cm. According to the method for planting the lettuce in the water, preferably, after planting and water planting of the seedling of the lettuce, the seedling is irradiated by adopting a combined artificial light source with the red-blue light ratio of (5-7): 1. According to the planting method of the hydroponic lettuce, after field planting and before harvesting, preferably, the EC value of the nutrient solution is regulated in stages, wherein the EC value of the nutrient solution is 0.8-1.0 MS/cm within 3 days after field planting, and the EC value of the nutrient solution is 1.2 mS/cm-1.5 mS/cm in the growing period. According to the planting method of the hydroponic lettuce, which is protected by the invention, preferably, the pH value of the nutrient solution is 6.0-6.5. According to