CN110606777A - Special nutrient solution for hydroponic lettuce and preparation method thereof - Google Patents
Special nutrient solution for hydroponic lettuce and preparation method thereof Download PDFInfo
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- C05—FERTILISERS; MANUFACTURE THEREOF
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- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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Abstract
The invention relates to the technical field of hydroponic lettuce nutrient solution, in particular to special nutrient solution for hydroponic lettuce and a preparation method thereof; the nutrient solution comprises a solution A and a solution B, wherein the solution A comprises the following components in concentration: 538-543 mg/L of calcium ammonium nitrate and 480-485 mg/L of potassium nitrate; the liquid B comprises the following components in concentration: 323-328 mg/L potassium nitrate, 490-495 mg/L magnesium sulfate heptahydrate, 178-183 mg/L potassium dihydrogen phosphate, 18-23 mg/L sodium ferric ethylenediamine tetraacetate, 2.0-2.2 mg/L manganese sulfate monohydrate, 0.2-0.3 mg/L zinc sulfate heptahydrate, 0.07-0.09 mg/L copper sulfate pentahydrate, 0.01-0.03 mg/L sodium molybdate and 2.8-2.9 mg/L boric acid. The preparation method of the nutrient solution is simple and easy to operate. The nutrient solution provided by the invention can improve the quality of lettuce, promote the VC content, reduce the nitrite content, reduce the application amount of macroelement fertilizer and promote the development trend of agricultural water and fertilizer conservation.
Description
Technical Field
The invention relates to the technical field of hydroponic lettuce nutrient solutions, in particular to a special nutrient solution for hydroponic lettuce and a preparation method thereof.
Background
The water culture lettuce has high quality, clean, water-saving and fertilizer-saving, and has entered the industrial production stage in recent years. How to design a reasonable nutrient solution formula in production to achieve the aims of high quality and high yield is the core problem of lettuce soilless culture. The proper formula not only influences the growth and development of crops and the yield formation, but also relates to an economic fertilizer, reduces the production cost and improves the economic benefit.
Most nutrient solutions used in the prior production are general formulas aiming at common vegetables on the market, have no pertinence, have low yield per unit area in the using process, and generate high nitrite content, thereby influencing the yield and quality of lettuce. In addition, a large amount of element fertilizers in the nutrient solution are used in the growth process of the lettuce, so that the production cost is increased.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the special nutrient solution for water culture lettuce. The invention selects calcium ammonium nitrate as the source of the nitrogenous fertilizer, and the potassium nitrate, magnesium sulfate heptahydrate, potassium dihydrogen phosphate, ethylene diamine tetraacetic acid sodium iron, manganese sulfate monohydrate, zinc sulfate heptahydrate, copper sulfate pentahydrate, sodium molybdate and boric acid are matched, so that not only can nitrate nitrogen be provided, but also a small amount of ammonium nitrogen can be provided, the utilization efficiency and the yield of nitrogen can be obviously increased, the yield of the water culture lettuce can be increased, and the nitrate content can be obviously reduced.
The invention aims to provide a special nutrient solution for water culture lettuce, which comprises a solution A and a solution B; the liquid A comprises the following components in concentration: 538-543 mg/L of calcium ammonium nitrate and 480-485 mg/L of potassium nitrate; the liquid B comprises the following components in concentration: 323-328 mg/L potassium nitrate, 490-495 mg/L magnesium sulfate heptahydrate, 178-183 mg/L potassium dihydrogen phosphate, 18-23 mg/L sodium ferric ethylenediamine tetraacetate, 2.0-2.2 mg/L manganese sulfate monohydrate, 0.2-0.3 mg/L zinc sulfate heptahydrate, 0.07-0.09 mg/L copper sulfate pentahydrate, 0.01-0.03 mg/L sodium molybdate and 2.8-2.9 mg/L boric acid.
Preferably, the nutrient solution comprises equal amounts of the solution A and the solution B, and the EC value of the nutrient solution is 1.8 ms/cm.
Preferably, the pH value of the nutrient solution is 5.5-6.0.
Preferably, sodium hydroxide or dilute phosphoric acid is used as the pH regulator.
In a preferred embodiment of the present invention, the solution a is composed of the following components in concentration: 540mg/L of calcium ammonium nitrate and 483mg/L of potassium nitrate; the solution B comprises the following components in concentration: 325mg/L of potassium nitrate, 493mg/L of magnesium sulfate heptahydrate, 180mg/L of monopotassium phosphate, 20mg/L of sodium iron ethylenediaminetetraacetate, 2.13mg/L of manganese sulfate monohydrate, 0.22mg/L of zinc sulfate heptahydrate, 0.08mg/L of copper sulfate pentahydrate, 0.02mg/L of sodium molybdate and 2.86mg/L of boric acid.
The second object of the present invention is to provide a method for preparing any one of the above hydroponic lettuce culture solutions, comprising the steps of:
(1) weighing calcium ammonium nitrate and potassium nitrate by taking water as a solvent to prepare solution A; the concentration of each component in the solution A is 100 times of the final concentration;
(2) taking water as a solvent, weighing potassium nitrate, magnesium sulfate heptahydrate, potassium dihydrogen phosphate, ethylene diamine tetraacetic acid sodium iron, manganese sulfate monohydrate, zinc sulfate heptahydrate, copper sulfate pentahydrate, sodium molybdate and boric acid to prepare solution B; the concentration of each component in the solution B is 100 times of the final concentration;
(3) measuring equal amounts of solution A and solution B, and adding water until the EC value of the nutrient solution is 1.8ms/cm to obtain the nutrient solution.
Preferably, the method further comprises the step of adjusting the pH of the nutrient solution stock solution to 5.5-6.0.
The invention has the beneficial effects that: the nutrient solution provided by the invention can increase the yield of lettuce, improve the quality of lettuce, promote the VC content, reduce the nitrite content, reduce the application amount of macroelement fertilizer and promote the development trend of agricultural water and fertilizer conservation. The nutrient solution can be used for testing the seeds of Italian lettuce, butter lettuce, scattered lettuce and oak lettuce, and can ensure the normal growth of plants.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1
Preparing 100 times of special nutrient solution concentrated solution for hydroponic lettuce:
preparing a solution A: the capacity is 100L; weighing calcium ammonium nitrate (5Ca (NO))3)2·NH4NO3·10H2O)5.4kg, potassium nitrate (KNO)3)4.83kg of the mixture is sequentially added into a 90L water volume barrel, stirred to be fully dissolved, and added with water to reach a constant volume of 100L.
Preparing a solution B: the capacity is 100L; adding 70L water into the volumetric barrel, and weighing potassium nitrate (KNO)3) Adding 3.25kg into a volumetric barrel, stirring uniformly, and weighing magnesium sulfate heptahydrate (MgSO)4 7H2O)4.93kg, pouring into a volumetric barrel, stirring uniformly, adding 10L of water, and weighing potassium dihydrogen phosphate (KH)2PO4)1.8kg, pouring into a volumetric barrel, stirring uniformly, adding 10L of water, and respectively weighing manganese sulfate monohydrate (MnSO)4·H2O)21.3g, zinc sulfate heptahydrate (ZnSO)4·7H2O)2.2g, copper sulfate pentahydrate (CuSO)4·5H2O)0.8g, sodium molybdate (Na)2MoO4·2H2O)0.2g, boric acid (H)3BO3)28.6g of the mixture is dissolved in the volume barrel one by one and stirred evenly, 200g of ethylene diamine tetraacetic acid (EDTA-Fe-13) is weighed and dissolved in the volume barrel, and finally water is added to the volume of 100L.
When in use, the same amount of solution A and solution B is measured, water is added to adjust the EC value to 1.8ms/cm, sodium hydroxide (NaOH) or diluted phosphoric acid is adopted to adjust the pH value of the working solution, and the final pH value reaches 5.5-6.0.
The present embodiment also sets a control group.
The control group differed from this example only in that the nutrient solution formulations were the traditional garden test formulation and the kazaki lettuce formulation.
The nutrient solution prepared by the embodiment is compared with the traditional garden trial formula and the formula of the Kawasaki lettuce to cultivate the water culture lettuce which is a scattered-leaf lettuce 'green powder'. During field planting, plants are placed in 3 different nutrient solutions, the EC and PH values of the 3 nutrient solutions are kept consistent in the whole growth period, and all indexes are measured after harvesting, wherein the data are as follows:
the influence on the growth vigor and the yield of the lettuce, the plant height, the leaf blade and the root growth condition of each cell under 3 kinds of nutrient solutions are shown in a table 1;
TABLE 13 growth conditions of plants under nutrient solution
Note: lower case letters after the numbers in the table indicate significance of difference at the 0.05 level.
As can be seen from table 1, the number of leaves of the plants under the formula of this example was significantly greater than that of the other 2 control groups at harvest, the length of the main root was longest, the weight of the single plant was greatest, and the yield was highest. The lettuce in the formula of the embodiment can reach 24.8 slices, the average root length is 45.0cm, the lettuce is 54.1 percent and 56.3 percent higher than that of the Kawasaki and garden trial formula respectively, the weight of the single plant on the overground part is 19.8 percent and 28.4 percent higher than that of the plant in the Kawasaki and garden trial formula respectively, the yield of the overground part is 4.22kg/m2, and the yield of the overground part is 19.9 percent and 28.3 percent higher than that of the Kawasaki and garden trial formula respectively.
The influence on the nutritional quality of lettuce, the quality of lettuce in 3 nutrient solutions is shown in table 2:
TABLE 23 nutrient solution plant quality index
Note: lower case letters after the numbers in the table indicate significance of difference at the 0.05 level.
As shown in table 2, of the 3 kinds of nutrient solutions, the lettuce produced by the formula of the present embodiment has the highest content of VC and soluble sugar, especially the content of VC is 1.86 times of the treatment of the garden trial formula; the nitrate content of the lettuce produced by the formula of the embodiment can be obviously reduced.
The water and fertilizer application conditions are shown in the table 3:
table 33 nutrient solution plot water and fertilizer dosage conditions
Note: lower case letters after the numbers in the table indicate significance of difference at the 0.05 level.
In a production district with the same area, the water and fertilizer usage are recorded in the whole growth period, and the yield is calculated, so that when 1kg of lettuce (overground part) is produced, 18.55L of water is used under the formula of the embodiment, and 41.1% and 25% of water is saved in Kawasaki and garden trial formula respectively; the formulation of this example used the least amount of macroelement fertilizer, 98.3% and 94.1% of the kazaki and garden pilot formulations, respectively.
Although the invention has been described in detail hereinabove by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that many modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (7)
1. A special nutrient solution for hydroponic lettuce is characterized by comprising a solution A and a solution B; the liquid A comprises the following components in concentration: 538-543 mg/L of calcium ammonium nitrate and 480-485 mg/L of potassium nitrate; the liquid B comprises the following components in concentration: 323-328 mg/L potassium nitrate, 490-495 mg/L magnesium sulfate heptahydrate, 178-183 mg/L potassium dihydrogen phosphate, 18-23 mg/L sodium ferric ethylenediamine tetraacetate, 2.0-2.2 mg/L manganese sulfate monohydrate, 0.2-0.3 mg/L zinc sulfate heptahydrate, 0.07-0.09 mg/L copper sulfate pentahydrate, 0.01-0.03 mg/L sodium molybdate and 2.8-2.9 mg/L boric acid.
2. The special nutrient solution for hydroponic lettuce according to claim 1, wherein the nutrient solution comprises the solution A and the solution B in equal amount, and the EC value of the nutrient solution is 1.8 ms/cm.
3. The special nutrient solution for hydroponic lettuce according to any one of claims 1 or 2, wherein the pH value of the nutrient solution is 5.5-6.0.
4. The special nutrient solution for hydroponic lettuce according to any one of claims 1 to 3, wherein sodium hydroxide or dilute phosphoric acid is used as a pH value regulator.
5. The special nutrient solution for hydroponic lettuce according to claim 1, wherein the solution A consists of the following components in concentration: 540mg/L of calcium ammonium nitrate and 483mg/L of potassium nitrate; the solution B comprises the following components in concentration: 325mg/L of potassium nitrate, 493mg/L of magnesium sulfate heptahydrate, 180mg/L of monopotassium phosphate, 20mg/L of sodium iron ethylenediaminetetraacetate, 2.13mg/L of manganese sulfate monohydrate, 0.22mg/L of zinc sulfate heptahydrate, 0.08mg/L of copper sulfate pentahydrate, 0.02mg/L of sodium molybdate and 2.86mg/L of boric acid.
6. The preparation method of the special nutrient solution for hydroponic lettuce, which is described in any one of claims 1 to 5, is characterized by comprising the following steps:
(1) weighing calcium ammonium nitrate and potassium nitrate by taking water as a solvent to prepare solution A; the concentration of each component in the solution A is 100 times of the final concentration;
(2) taking water as a solvent, weighing potassium nitrate, magnesium sulfate heptahydrate, potassium dihydrogen phosphate, ethylene diamine tetraacetic acid sodium iron, manganese sulfate monohydrate, zinc sulfate heptahydrate, copper sulfate pentahydrate, sodium molybdate and boric acid to prepare solution B; the concentration of each component in the solution B is 100 times of the final concentration;
(3) measuring equal amounts of solution A and solution B, and adding water until the EC value of the nutrient solution is 1.8ms/cm to obtain the nutrient solution.
7. The preparation method of claim 6, further comprising the step of adjusting the pH of the nutrient solution stock solution to 5.5-6.0.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112047790A (en) * | 2020-10-15 | 2020-12-08 | 沈阳农业大学 | Lettuce mixed nutrient solution and preparation method thereof |
| CN112174759A (en) * | 2020-10-15 | 2021-01-05 | 京东方后稷科技(北京)有限公司 | Water culture lettuce efficient nutrient solution and water culture method thereof |
| CN112299908A (en) * | 2020-12-01 | 2021-02-02 | 北京市农业技术推广站 | AB fertilizer special for leaf vegetable water culture and preparation method thereof |
| CN112430154A (en) * | 2020-12-01 | 2021-03-02 | 北京市农业技术推广站 | AB water-soluble fertilizer special for soilless culture of fruit vegetables and preparation method thereof |
| CN112500235A (en) * | 2020-12-31 | 2021-03-16 | 黑龙江东部节水设备有限公司 | Nutrient solution special for hydroponic milk Chinese cabbage and preparation method thereof |
| CN113880629A (en) * | 2021-08-30 | 2022-01-04 | 正恒(上海)农业科技有限公司 | Water culture nutrient solution for lettuce, preparation method and lettuce cultivation method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112047790A (en) * | 2020-10-15 | 2020-12-08 | 沈阳农业大学 | Lettuce mixed nutrient solution and preparation method thereof |
| CN112174759A (en) * | 2020-10-15 | 2021-01-05 | 京东方后稷科技(北京)有限公司 | Water culture lettuce efficient nutrient solution and water culture method thereof |
| CN112299908A (en) * | 2020-12-01 | 2021-02-02 | 北京市农业技术推广站 | AB fertilizer special for leaf vegetable water culture and preparation method thereof |
| CN112430154A (en) * | 2020-12-01 | 2021-03-02 | 北京市农业技术推广站 | AB water-soluble fertilizer special for soilless culture of fruit vegetables and preparation method thereof |
| CN112500235A (en) * | 2020-12-31 | 2021-03-16 | 黑龙江东部节水设备有限公司 | Nutrient solution special for hydroponic milk Chinese cabbage and preparation method thereof |
| CN113880629A (en) * | 2021-08-30 | 2022-01-04 | 正恒(上海)农业科技有限公司 | Water culture nutrient solution for lettuce, preparation method and lettuce cultivation method |
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