CN104926430B - A kind of water planting romaine lettuce nutrient solution and preparation method and application - Google Patents
A kind of water planting romaine lettuce nutrient solution and preparation method and application Download PDFInfo
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Abstract
The present invention relates to a kind of water planting romaine lettuce nutrient solution, the nutrient solution includes the composition of following concentration：115~120mg/L of calcium nitrate, 74~78mg/L of potassium nitrate, 120~125mg/L of magnesium sulfate, 63~67mg/L of potassium sulfate, 18~22mg/L of chelated iron, 0.4~0.6mg/L of boric acid, 0.4~0.6mg/L of manganese sulfate, 0.045~0.055mg/L of zinc sulfate, 0.015~0.025mg/L of copper sulphate, 0.008~0.012mg/L of ammonium molybdate and pH value regulator；The pH value of the nutrient solution is 5.5~6.5, and the pH value regulator is made up of dust technology and phosphoric acid,diluted.Nutrient solution provided by the invention balances the ratio of each element, while the composition of nutrient solution and pH regulation and control are considered, and while production cost is reduced, improves the yield and nutrient solution utilization ratio of romaine lettuce.
Description
Technical field
The present invention relates to industrialized agriculture cultivation technique without soil field, more particularly to a kind of water planting romaine lettuce nutrient solution and its preparation
With application process.
Background technology
Water planting has cleaning, cheap the characteristics of being easy to regulation and control, turns into industrialized vegetable life using nutrient solution as cultivation medium
Produce one of preferred cultivation mode.However, because under the conditions of nutrient fluid cultivation, the root system of crop is directly immersed in nutrient solution
In, because the resiliency of nutrient solution is much weaker than soil, the fluctuation of its component, characteristic can produce to the health of crop in a short time
Raw harmful effect.Although can avoid above-mentioned influence by changing nutrient solution, replacing nutrient solution can cause very big to water resource
Waste, and the nitrogen of the inorganic states of the residual in nutrient solution waste liquid, phosphorus are discharged into environment also the water environment of locality can be caused
Potential threat.
Therefore, use enclosed planting type in the factory culture system of scale, i.e., by by certain more
Piping installation realizes nutrient solution closed cycle in cultivation system, and maintains the steady of nutrient solution character by the regulation and control of component
It is fixed, to create suitable planting environment for crop.Nutrient solution prescription uses EC and pH two indices to weigh.Normal conditions
Under, production manager often separately considers EC management and control and pH management and control, i.e., prepares nutrient solution using general cultivation formula, will seek
Nutrient solution EC adjusts the pH that nutrient solution to zone of reasonableness, is then adjusted using pH adjusting agent.However, for most crops, make
Thing root system is larger to the uptake of nitrogen in nutrient solution, phosphorus, potassium, and calcium, magnesium, the demand of sulphur are smaller.Crop root is each to nutrient solution
The lack of balance of leading ion, which absorbs, can cause nutrient solution prescription balance phenomenon occur, and the pH value of nutrient solution can be also raised, it is necessary to logical
Addition pH adjusting agent is crossed to be adjusted to suitable scope, and the pH adjusting agent added is mostly nitric acid.Adjusted by nutrient solution pH
Control and also brought substantial amounts of nitrate anion into nutrient solution while nutrient solution acid or alkali environment is improved, excess nitric acid root in nutrient solution
Nutrient solution prescription can be caused unbalance, cause antagonism of ions, nitrate enrichment, VC contents the quality of vegetable such as reduce and deteriorated in crop body
Problem.
In view of this, it would be highly desirable to optimize design for nutrient solution prescription during existing water planting crops, on this basis
Establish high-quality and efficient vegetable soilless culture production model.
The content of the invention
The present invention is directed to the compounding run into batch production romaine lettuce cultivation and pH regulates and controls what is independently brought
The problem of nutrient solution prescription is unbalance, existing formula is improved, nutrient solution matched somebody with somebody on the basis of crop nutrition content demand is ensured
The fertilizer type of side optimizes, and introduces potassium sulfate, phosphoric acid, nitric acid, eliminates phosphate, reduces calcium nitrate and potassium nitrate
Dosage, the balance of nutrition liquid nitrogen, phosphorus, potassium has been taken into account while ensureing that nutrient solution pH is stable, has improved the yield and product of romaine lettuce
Matter.
The first object of the present invention is a kind of water planting romaine lettuce nutrient solution of protection.
Romaine lettuce of the present invention is also known as Leaf lettuce, goose son dish, mark son dish, lettuce son's dish, belongs to composite family Lactuca, and Latin is entitled
var.ramosa Hort.。
The present invention is directed to the characteristic of romaine lettuce, and the dosage of composition and each composition to nutrient solution has carried out reasonably optimizing, together
When the pH value of nutrient solution is defined, each component synergy, the effect of so as to improve nutrient solution.
Specifically, the invention provides a kind of water planting romaine lettuce nutrient solution, the nutrient solution to include the composition of following concentration：
115~120mg/L of calcium nitrate, 74~78mg/L of potassium nitrate, 120~125mg/L of magnesium sulfate, 63~67mg/L of potassium sulfate, chelating
18~22mg/L of iron, 0.4~0.6mg/L of boric acid, 0.4~0.6mg/L of manganese sulfate, 0.045~0.055mg/L of zinc sulfate, sulfuric acid
0.015~0.025mg/L of copper, 0.008~0.012mg/L of ammonium molybdate, pH adjusting agent.
The chelated iron is preferably iron edta sodium salt EDTA-FeNa.
The pH value of the nutrient solution is 5.5~6.5.
The pH adjusting agent is by 3~7% dust technologies and 3~7% phosphoric acid,diluteds by volume 1.5~2.5:1 mixed preparing and
Into preferably by 4~6% dust technologies and 4~6% phosphoric acid,diluteds by volume 2:1 mixed preparing forms.
As a preferred embodiment of the present invention, the nutrient solution is formulated by the composition of following concentration：Calcium nitrate
118mg/L, potassium nitrate 76mg/L, magnesium sulfate 123mg/L, potassium sulfate 65mg/L, chelated iron 20mg/L, boric acid 0.5mg/L, sulfuric acid
Manganese 0.5mg/L, zinc sulfate 0.05mg/L, copper sulphate 0.02mg/L, ammonium molybdate 0.01mg/L and pH value regulator；
The pH value of the nutrient solution is 5.5~6.5, and the pH value regulator is by 4~6% dust technologies and 4~6% phosphoric acid,diluteds
By volume 2:1 mixes.
PH adjusting agent of the present invention is further preferably by 5% dust technology and 5% phosphoric acid,diluted by volume 2:1 mixing is matched somebody with somebody
System forms, and the pH adjusting agent of the formula is optimal for the pH value regulating effect of water planting romaine lettuce nutrient solution provided by the invention.
The second object of the present invention is to protect the compound method of the water planting romaine lettuce nutrient solution.This method is by nutrient solution stoste
Preparation and pH regulation and control consider as a whole, the effect of so as to improve water planting romaine lettuce nutrient solution.
Specifically, the invention provides a kind of compound method of water planting romaine lettuce nutrient solution, methods described to include following step
Suddenly：
(1) each composition is weighed, using water as solvent, prepares mother liquor A, mother liquor B and mother solution C respectively；
Wherein, mother liquor A includes calcium nitrate and potassium nitrate；Mother liquor B includes magnesium sulfate and potassium sulfate；Mother solution C include chelated iron,
Boric acid, manganese sulfate, zinc sulfate, copper sulphate and ammonium molybdate；The concentration of each composition is 400~600 times of aimed concn；
(2) water filling into nutrient solution liquid storage tank, the mother liquid obtained A of step (1), mother liquor B and mother liquor are sequentially added while stirring
C, each composition is reached aimed concn, after being well mixed, produce nutrient solution stoste；
(3) pH value of nutrient solution stoste obtained by step (2) is adjusted to 5.5~6.5 using pH adjusting agent of the present invention,
Produce water planting lettuce planting liquid.
In the step (1), the preparation of each mother liquor can be carried out indoors.
In the step (2), the preparation of nutrient solution stoste can be carried out in the nutrient solution liquid storage tank of cultivation system.Adding
After each mother liquor, will be sufficiently stirred, to ensure that mother liquor and water are well mixed, to prevent under addition during a kind of mother liquor because
Precipitated for localized ion concentration is too high, make the validity of nutrient solution reduce.Running water can be used in the water.
In the step (3), because the general pH for preparing the water used in nutrient solution is higher than 6.5 more, or even occurs and be higher than
7.5 situation, therefore, the pH of nutrient solution stoste is detected obtained by reply step (2) in step (3), and using the present invention
The pH adjusting agent adjusts the pH of nutrient solution to 5.5~6.5.
The third object of the present invention is to protect the application of the water planting romaine lettuce nutrient solution.This method can fully avoid nutrition
The each component unbalance being likely to occur during liquid use, it is ensured that the using effect of nutrient solution.
Specifically, the invention provides a kind of application process of water planting romaine lettuce nutrient solution, methods described to include following step
Suddenly：
(1) romaine lettuce is colonized in the liquid storage tank equipped with the water planting romaine lettuce nutrient solution, and nutrient turnover liquid；
(2) pH value of periodic detection nutrient solution, will using pH adjusting agent of the present invention when testing result is higher than 6.5
PH value is adjusted to 5.5~6.5.
In the step (1), nutrient solution can continue to consume during Growth of Lettuce, when the nutrient solution in liquid storage tank is consumed to
Original volume 1/2 when, can Additional nutrient solution to original volume.
In the step (2), due to the lack of balance absorption of crop root during Growth of Lettuce, nutrient solution can be caused
PH is raised, therefore needs to carry out periodic detection to the pH of nutrient solution, when testing result is higher than 6.5, it is necessary to of the present invention
PH adjusting agent carry out nutrient solution pH regulation and control, adjusted in the range of 5.5~6.5.Nutrient solution pH management processes can also
The intelligent management of unattended is realized by nutrient solution prescription on-line checking regulation device.
Preferably, the application process comprises the following steps：
(1) by the romaine lettuce Seeding planting that two panels true leaf deploys in the cultivation bed equipped with the water planting romaine lettuce nutrient solution, use
Water circulating pump provides nutrient solution, and water pump open frequency is 15 minutes/hour；
(2) pH value of periodic detection nutrient solution, when testing result is higher than 6.5, using by 5% dust technology and 5% dilute phosphorus
Acid by volume 2:1 pH adjusting agent mixed, pH value is adjusted to 5.5, harvested to romaine lettuce.
The above-mentioned technical proposal of the present invention has the following advantages that：First, the present invention regulates and controls the preparation of nutrient solution with pH comprehensive
Close and consider, suitably reduce the dosage of nitrate nitrogen in nutrient solution, avoid in compounding and pH regulation processes to nitrate anion
Excessive introducing, the input of nitrogenous fertilizer is reduced while nutrient solution prescription balance is maintained, while production cost is reduced, is carried
The high yield of romaine lettuce, quality and nutrient solution utilization ratio.Result of the test characterizes, with using single nitric acid regulation and control nutrient solution pH value
Compare, carrying out the regulation and control of nutrient solution pH value using the present invention can make the yield of vegetables increase by more than 20%, and nutrient solution utilization ratio
Improve more than 10%.The present invention substitutes phosphate (ammonium dihydrogen phosphate or the di(2-ethylhexyl)phosphate in conventional nutrient formula of liquid with phosphoric acid
Hydrogen potassium), on the one hand using the stable resiliency of phosphoric acid nutrient solution pH can be made to stablize in longer time in rational scope
It is interior, the nitric acid of part is on the other hand substituted with phosphoric acid on the premise of romaine lettuce phosphorus demand is ensured, so as to reduce the input of nitric acid,
Accumulation of the nitrate in crop body is avoided, while also ensure that the phosphorus demand of crop.The present invention is ensureing that crop nutrition content need to
The fertilizer type of nutrient solution prescription is optimized on the basis of asking, potassium sulfate, phosphoric acid, nitric acid is introduced, eliminates di(2-ethylhexyl)phosphate
Hydrogen ammonium, reduce the dosage of calcium nitrate and potassium nitrate, nutrition liquid nitrogen, phosphorus, potassium have been taken into account while ensureing that nutrient solution pH is stable
Balance, improve the yield and quality of romaine lettuce.
In summary, compared with prior art, the present invention stably considers nutrient solution prescription equilibrium with character as a whole, is tieing up
The balance of nutrition liquid nitrogen, phosphorus, potassium has been taken into account while holding nutrient solution pH stable, more suitable rhizosphere ring is created for crop
Border.Also, while production cost is reduced, improve the yield and nutrient solution utilization ratio of romaine lettuce.
Brief description of the drawings
Fig. 1 is the schematic diagram of nutrient fluid cultivation system described in embodiment 7；In figure, 1 cultivation system nutrient solution liquid storage tank, 2 supply
Liquid water pump, 3 cultivation beds.
Fig. 2 is the schematic diagram of nutrient solution automated management system described in embodiment 8；In figure, 1 cultivation system nutrient solution liquid storage
Pond, 2 feed flow water pumps, 3 cultivation beds, 4 pairs of ball-cock assemblys, 5 nutrient solution pH automated management systems, 6 nutrient solution stostes storage tank.
Fig. 3 is romaine lettuce yield result contrast schematic diagram described in embodiment 7.
Fig. 4 is nutrient solution pH dynamic change contrast schematic diagrams described in embodiment 7.
Embodiment
The embodiment of the present invention is described in further detail with reference to the accompanying drawings and examples.Following examples
For illustrating the present invention, but it is not limited to the scope of the present invention.
Compared with traditional water planting romaine lettuce nutrient solution prescription and application method, present embodiments provide for a kind of water planting romaine lettuce battalion
Nutrient solution formula and compound method, the formula and compound method consider EC regulation and control during compounding and pH regulation and control as a whole,
Avoid during compounding by the two independently carry out caused by nutrient solution prescription balance phenomenon generation.Thus, have
Effect controls the ratio of nitrogen in nutrient solution prescription, phosphorus and potassium, has taken into account nutrient solution simultaneously during nutrient solution prescription is prepared and has supported
It is divided to the regulation and control of two key factors of ratio and pH.Here, the concentration of essential element or pH regulations either in nutrient solution prescription
The ratio of nitric acid and phosphoric acid in agent, fine setting can be made, as long as the above-mentioned core design design of the application present invention is in the application
In the range of being claimed.
Without loss of generality, below using conventional closed type nutrient fluid cultivation system as technical foundation, to proposed by the present invention
Water planting romaine lettuce nutrient solution prescription and configuration application method elaborate.
Chelated iron described in various embodiments of the present invention is iron edta sodium salt EDTA-FeNa.
Embodiment 1
Water planting romaine lettuce nutrient solution is made up of the composition of following concentration：Calcium nitrate 118mg/L, potassium nitrate 76mg/L, magnesium sulfate
123mg/L, potassium sulfate 65mg/L, chelated iron 20mg/L, boric acid 0.5mg/L, manganese sulfate 0.5mg/L, zinc sulfate 0.05mg/L, sulphur
Sour copper 0.02mg/L, ammonium molybdate 0.01mg/L and pH value regulator；
The pH value of the nutrient solution is 5.5, and the pH value regulator is by 5% dust technology and 5% phosphoric acid,diluted by volume 2:1
Mix.
Embodiment 2
Compared with Example 1, differ only in, the pH value of the nutrient solution is 6.0, and the pH value regulator is dilute by 4%
Nitric acid and 6% phosphoric acid,diluted by volume 2:1 mixes.
Embodiment 3
Compared with Example 1, differ only in, the pH value of the nutrient solution is 6.5, and the pH value regulator is dilute by 6%
Nitric acid and 4% phosphoric acid,diluted by volume 2:1 mixes.
Embodiment 4
Water planting romaine lettuce nutrient solution is made up of the composition of following concentration：Calcium nitrate 115mg/L, potassium nitrate 74mg/L, magnesium sulfate
120mg/L, potassium sulfate 63mg/L, chelated iron 18mg/L, boric acid 0.4mg/L, manganese sulfate 0.4mg/L, zinc sulfate 0.045mg/L,
Copper sulphate 0.015mg/L, ammonium molybdate 0.008mg/L and pH value regulator；
The pH value of the nutrient solution is 6.0, the pH value regulator by 3% dust technology and 7% phosphoric acid,diluted by volume
1.5:1 mixes.
Embodiment 5
Water planting romaine lettuce nutrient solution is made up of the composition of following concentration：Calcium nitrate 120mg/L, potassium nitrate 78mg/L, magnesium sulfate
125mg/L, potassium sulfate 67mg/L, chelated iron 22mg/L, boric acid 0.6mg/L, manganese sulfate 0.6mg/L, zinc sulfate 0.055mg/L,
Copper sulphate 0.025mg/L, ammonium molybdate 0.012mg/L and pH value regulator；
The pH value of the nutrient solution is 6.5, the pH value regulator by 7% dust technology and 3% phosphoric acid,diluted by volume
2.5:1 mixes.
Embodiment 6
The water planting lettuce planting liquid of the offer of embodiment 1 is provided according to following steps：
(1) each composition is weighed, using water as solvent, prepares mother liquor A, mother liquor B and mother solution C respectively；Wherein：
Mother liquor A composition is：Calcium nitrate 59g/L, potassium nitrate 38g/L；
Mother liquor B composition is：Magnesium sulfate 61.5g/L, potassium sulfate 32.5g/L；
The composition of mother solution C is：Chelated iron：20g/L, boric acid 1.43g/L, manganese sulfate 1.065g/L, zinc sulfate 0.11g/L,
Copper sulphate 0.04g/L, ammonium molybdate 0.01g/L；
(2) 80L running water is injected into nutrient solution liquid storage tank, sequentially adds step (1) mother liquid obtained A while stirring
160ml, mother liquor B 160ml and mother solution C 160ml, after being well mixed, produce nutrient solution stoste；
(3) use is by 5% dust technology and 5% phosphoric acid,diluted by volume 2:1 pH adjusting agent mixed, by step (2)
The pH value of gained nutrient solution stoste is adjusted to 5.5, produces water planting lettuce planting liquid.
Embodiment 7
Romaine lettuce is cultivated in precision agriculture Demonstration Base greenhouse experiments area of man of little Tang mountain countries (kind is to be big as raw No. 2)；Water planting
The composition of romaine lettuce nutrient solution is the same as embodiment 1；The compound method of nutrient solution is the same as embodiment 6；Culture apparatus is as shown in Figure 1；According to
Lower step cultivates romaine lettuce：
(1) by the romaine lettuce Seeding planting that two panels true leaf deploys in the liquid storage tank equipped with the water planting romaine lettuce nutrient solution, use
Water circulating pump provides nutrient solution, and water pump open frequency is 15 minutes/hour；
(2) pH value of periodic detection nutrient solution, when testing result is higher than 6.5, using by 5% dust technology and 5% dilute phosphorus
Acid by volume 2:1 pH adjusting agent mixed, pH value is adjusted to 5.5, harvested to romaine lettuce.
The present embodiment sets control group simultaneously.
Control group and the present embodiment are differed only in, and nutrient solution is made up of conventional formulation, and the conventional formulation is specially：
Calcium nitrate 472mg/L, potassium nitrate 303.5mg/L, magnesium sulfate 246.5mg/L, ammonium dihydrogen phosphate 57.5mg/L, chelated iron 20mg/
L, boric acid 0.5mg/L, manganese sulfate 0.5mg/L, zinc sulfate 0.05mg/L, copper sulphate 0.02mg/L, ammonium molybdate 0.01mg/L.Should
For nutrient solution prescription nutrient composition, plant growth needs can be met, due to preparing nutrient solution in commercialization cultivation
Water is derived from underground water or well water more, and the pH for preparing nutrient solution stoste is above 6.5, even up to 7.5 or so, therefore will be sought by nitric acid
The pH value of nutrient solution is adjusted to 5.5.
Its yield is determined after romaine lettuce harvest, as a result as shown in Figure 3.Romaine lettuce determination of yield result shows, is given birth to for individual plant
Dish, the yield of the present embodiment (new research and development formula) is 130g, than the output increased 24.5% of control group (conventional formulation).
The cultural method provided according to the present embodiment, the nutrient fluid cultivation romaine lettuce that each embodiment provides and right is respectively adopted
Compare single plant yield.After testing, the single plant yield highest of the cultivation of embodiment 1 gained romaine lettuce, secondly, embodiment 4,5 is most for embodiment 2,3
It is low；Meanwhile the yield of romaine lettuce is all remarkably higher than control group obtained by the nutrient fluid cultivation of each embodiment offer.
Meanwhile the pH dynamics of romaine lettuce in breeding time are analyzed, the present embodiment (new research and development formula) is (conventional with control group
Formula) result compared is as shown in Figure 4.The scheme of the present embodiment improves the stability of nutrient solution pH value compared with control group,
Reduce nutrient solution pH regulation number and the dosage of conditioning agent, so as to reduce the input amount of nitric acid, substantially increase nutrition
The utilization rate of nitrogen fertilizer of liquid, while using the arrangement achieves nutrient solution pH value auto-control, saved cost of labor.
Embodiment 8
The present embodiment proposes the nutrient solution prescription and modulator approach being combined carry out nutrient solution with pH intelligent controlling devices
The application case of component intelligent management.
Fig. 2 shows the schematic diagram of the nutrient solution pH automated management systems of the present embodiment.Compared with Example 7, this implementation
Example installs double ball-cock assemblys in liquid storage tank, and battalion is pumped into nutrient solution when nutrient solution liquid level is down to predeterminated position A2 in liquid storage tank
Nutrient solution stoste, solution feed pump is closed when nutrient solution liquid level reaches predeterminated position A1 in liquid storage tank.
Remaining operation is the same as embodiment 7.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or
Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (6)
1. a kind of water planting romaine lettuce nutrient solution, it is characterised in that the nutrient solution is made up of the composition of following concentration：Calcium nitrate
118mg/L, potassium nitrate 76mg/L, magnesium sulfate 123mg/L, potassium sulfate 65mg/L, chelated iron 20mg/L, boric acid 0.5mg/L, sulfuric acid
Manganese 0.5mg/L, zinc sulfate 0.05mg/L, copper sulphate 0.02mg/L, ammonium molybdate 0.01mg/L, pH value regulator；
The pH value of the nutrient solution is 5.5~6.5；The pH value regulator is by 5% dust technology and 5% phosphoric acid,diluted by volume 2:
1 mixes.
2. water planting romaine lettuce nutrient solution according to claim 1, it is characterised in that the nutrient solution by following concentration composition
Composition：Calcium nitrate 118mg/L, potassium nitrate 76mg/L, magnesium sulfate 123mg/L, potassium sulfate 65mg/L, sodium iron ethylene diamine tetra acetate
20mg/L, boric acid 0.5mg/L, manganese sulfate 0.5mg/L, zinc sulfate 0.05mg/L, copper sulphate 0.02mg/L, ammonium molybdate 0.01mg/
L, pH value regulator；
The pH value of the nutrient solution is 5.5；The pH value regulator is by 5% dust technology and 5% phosphoric acid,diluted by volume 2:1 mixing
Form.
3. the compound method of the water planting romaine lettuce nutrient solution of claim 1 or 2, it is characterised in that methods described includes following step
Suddenly：
(1) each composition is weighed, using water as solvent, prepares mother liquor A, mother liquor B and mother solution C respectively；Wherein, mother liquor A includes calcium nitrate
And potassium nitrate；Mother liquor B includes magnesium sulfate and potassium sulfate；Mother solution C include chelated iron, boric acid, manganese sulfate, zinc sulfate, copper sulphate and
Ammonium molybdate；The concentration of each composition is 400~600 times of final concentration in mother liquor；
(2) water filling into nutrient solution liquid storage tank, the mother liquid obtained A of step (1), mother liquor B and mother solution C are sequentially added while stirring, is made
Each composition reaches final concentration, after being well mixed, produces nutrient solution stoste；
(3) pH value of nutrient solution stoste obtained by step (2) is adjusted to 5.5~6.5 using pH adjusting agent, produces the training of water planting romaine lettuce
Nutrient solution.
4. the water planting romaine lettuce battalion that the water planting romaine lettuce nutrient solution or claim 3 methods described described in claim 1 or 2 are formulated
The application of nutrient solution；The application comprises the following steps：
(1) romaine lettuce is colonized in the cultivation bed equipped with the water planting romaine lettuce nutrient solution, and nutrient turnover liquid；
(2) pH value of periodic detection nutrient solution, when testing result is higher than 6.5, adjusted pH value to 5.5 using pH adjusting agent~
6.5。
5. application according to claim 4, it is characterised in that step (1) the nutrient turnover liquid is specially：Work as storage
When nutrient solution in liquid pool is consumed to the 1/2 of original volume, Additional nutrient solution to original volume.
6. the water planting romaine lettuce battalion that the water planting romaine lettuce nutrient solution or claim 3 methods described described in claim 1 or 2 are formulated
The application of nutrient solution；The application comprises the following steps：
(1) by the romaine lettuce Seeding planting that two panels true leaf deploys in the cultivation bed equipped with the water planting romaine lettuce nutrient solution, with circulation
Water pump provides nutrient solution, and water pump open frequency is 15 minutes/hour；
(2) pH value of periodic detection nutrient solution, when testing result is higher than 6.5, pressed using by 5% dust technology and 5% phosphoric acid,diluted
Volume ratio 2:1 pH adjusting agent mixed, pH value is adjusted to 5.5；Harvested to romaine lettuce.
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| CN101381246A (en) * | 2008-10-17 | 2009-03-11 | 叶军 | Water planting plant nutrient solution and production process |
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| WO2021162854A1 (en) * | 2020-02-10 | 2021-08-19 | Mymd Pharmaceuticals, Inc. | Nutrient composition for improving productivity and yield of hydroponically grown plants |
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