A laying method of indoor ground of a phase change passive facility agricultural house

Abstract

The application discloses a laying method of indoor ground of a phase-change passive facility agricultural house. The laying method comprises the following steps: (1) synthesizing a phase-change microcapsule material, and then mixing the phase-change microcapsule material with water and starch, and stirring and reacting under heating; (2) injecting the obtained product in step (1) into a straw pipe to obtain a composite straw material, drying the composite straw material, and then cutting the composite straw material; and (3) uniformly mixing the composite straw material after the cutting in step (2) with indoor ground soil of a greenhouse. The indoor ground of the phase-change passive facility agricultural house laid by the method has the advantages of controllable temperature and humidity, good indoor air quality, soil fertility supplement, inhibition of reproduction of harmful bacteria groups in soil, high energy-saving property and simple construction and the like.

Description

Technical Field

[0001] This invention belongs to the field of greenhouse environmental control technology for facility agriculture, and specifically relates to a method for laying the indoor floor of a phase change passive facility agriculture building. Background Technology

[0002] Controlled environmental agriculture (CEPA) is a modern agricultural method that utilizes engineering techniques to achieve high-efficiency production of plants and animals under relatively controlled environmental conditions. China has a large-scale CEPA operation, with over 95% of it utilizing polyolefin greenhouse films. However, traditional greenhouses, constructed with plastic film covering the light-transmitting surfaces and the surrounding structure, create a relatively enclosed, hot, and humid environment, leading to problems such as poor air circulation, bacterial growth, and decreased soil nutrients.

[0003] CN205030258U discloses a geothermal temperature and humidity regulation device for the topsoil layer of a greenhouse, including PVC heat dissipation pipes and a fan. Two sets of vertical main pipes are installed side-by-side on the same plane at a distance of 80cm-100cm on the south side of the greenhouse. The westernmost main pipe of one set is 1000mm-1500mm away from the western wall. The upper end of the main pipe extends into the greenhouse via a bend, close to the top of the greenhouse and into the greenhouse. The main pipe is connected to the air intake pipe via the fan. The ground direction of the main pipe is connected to the fan main pipe and installed at a 90° angle. The ground direction of the main pipe is perpendicular to the topsoil layer. This method aims to achieve suitable air and soil temperature and humidity for crop growth in the greenhouse, both in summer and winter. However, using soil as a heat storage medium has limited heat storage and temperature regulation capacity. Furthermore, rapid air circulation in the soil layer can easily cause rapid soil moisture loss, which is detrimental to soil moisture retention.

[0004] CN107347517A discloses a soil heat storage and heat pipe convection heat exchange system and its heat exchange method. In this system, ABCD represents the greenhouse floor, AEFB-CDHG represents the greenhouse walls, and the remaining surfaces are made of transparent, light-transmitting plastic. Crops are grown on the ABCD greenhouse floor or used for hydroponics. A heat storage pipe is connected to a main heating pipe, which vertically passes through the soil layer and is connected to a heat-absorbing fan. The heat-absorbing fan draws air from inside the greenhouse into the main heating pipe. Parallel heat dissipation pipes are buried in the greenhouse soil constant-temperature layer, and heat pipes are also vertically buried in the soil constant-temperature layer, with the condensation ends exposed above the greenhouse floor to dissipate heat to the air. This method has a simple structure, maintains soil temperature, and is beneficial for crop growth. However, the heat pipes buried in the soil layer easily cause soil moisture loss, i.e., the soil moisture drops too quickly, and this method does not provide fertilizer protection for the soil layer. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention provides a method for laying the indoor floor of a phase change passive facility agriculture building. The indoor floor laying method for phase change passive facility agriculture buildings provided by this invention has advantages such as controllable temperature and humidity, good indoor air quality, replenishment of soil fertility, inhibition of harmful soil bacteria growth, high energy efficiency, and simple construction.

[0006] The first aspect of this invention provides a method for laying the indoor floor of a phase-change passive facility agriculture building, comprising the following steps:

[0007] (1) Synthesize phase change microcapsule materials, then mix them with water and starch, and heat and stir to react;

[0008] (2) The material obtained in step (1) is injected into the straw tube to obtain composite straw material, dried, and then the composite straw material is cut.

[0009] (3) Mix the composite straw material cut in step (2) with the soil on the ground inside the greenhouse evenly.

[0010] Further, in step (1), the synthesis method of the phase change microcapsule material is as follows:

[0011] (i) A composite phase change material is obtained by co-heating and melting a hydrated salt phase change material and a sugar alcohol phase change material, and then a carrier gas is introduced for protection.

[0012] (ii) Take zinc salt, silver salt, organic ligand, amino acid and water and mix them to react. The mixture after reaction is mixed with the composite phase change material and initiator in step (i) under the protection of the carrier, and then subjected to high-speed shear reaction to obtain phase change microcapsule material.

[0013] Further, the phase transition temperature range of the hydrated salt phase change material in step (i) is 20°C to 40°C, and it is preferably selected from at least one of sodium sulfate decahydrate, calcium chloride hexahydrate, and disodium hydrogen phosphate dodecahydrate, with sodium sulfate decahydrate being the most preferred.

[0014] Further, the phase transition temperature range of the sugar alcohol phase change material in step (i) is 70°C to 120°C, and it is preferably selected from at least one of D-threitol, xylitol, and erythritol, with D-threitol being the most preferred.

[0015] Further, the mass ratio of the hydrated salt phase change material to the sugar alcohol phase change material in step (i) is 1:(0.005~0.035), preferably 1:(0.009~0.018).

[0016] Furthermore, the hydrated salt phase change material and the sugar alcohol phase change material described in step (i) are preferably dried before co-heating and melting, and more preferably vacuum drying is used with a vacuum degree of 100 Pa to 300 Pa.

[0017] Further, the co-heating melting reaction in step (i) is carried out at 90°C to 125°C for 3 to 6 hours.

[0018] Further, the carrier gas in step (i) is an inert gas or high-purity nitrogen, preferably high-purity nitrogen with a purity of 99% or higher; wherein the inert gas is selected from either high-purity helium or high-purity argon.

[0019] Further, in step (i), the flow rate ratio of the composite phase change material to the carrier gas is 1g composite phase change material: (1mL / min~15mL / min) carrier gas, preferably 1g composite phase change material: (2.5mL / min~6mL / min) carrier gas.

[0020] Further, the zinc salt described in step (ii) is selected from one or more of zinc nitrate hexahydrate, zinc chloride trihydrate, and zinc acetate dihydrate, preferably zinc nitrate hexahydrate.

[0021] Further, the silver salt described in step (ii) is selected from one or more of silver nitrate, silver fluoride and silver perchlorate, preferably silver nitrate.

[0022] Further, the organic ligand in step (ii) is selected from one or more of terephthalic acid, pyromellitic acid and pyromellitic tetracarboxylic acid, preferably pyromellitic tetracarboxylic acid.

[0023] Further, the amino acid mentioned in step (ii) is selected from amino acids with an average molecular weight of less than 200, and is selected from one or more of aspartic acid, lysine, and L-cysteine, preferably aspartic acid. The amino acid is preferably selected from those with an average molecular weight of 50 to 200.

[0024] Further, the initiator in step (ii) is selected from one or more of azobisisobutyronitrile, lauroyl peroxide and sodium bisulfite, preferably azobisisobutyronitrile.

[0025] Further, the zinc salt, silver salt, organic ligand, amino acid and water in step (ii) are mixed in a mass ratio of 1:(0.15-0.75):(0.35-0.95):(0.08-0.23):(25-85), preferably 1:(0.35-0.5):(0.5-0.75):(0.14-0.18):(35-50).

[0026] Further, the reaction described in step (ii) is carried out at 65°C to 85°C and 200 rpm to 400 rpm for 8 h to 12 h.

[0027] Further, the mass ratio of the reacted material mixture, composite phase change material, and initiator in step (ii) is 1:(0.1-0.6):(0.01-0.08), preferably 1:(0.2-0.4):(0.03-0.06).

[0028] Further, the conditions for the high-speed shear reaction in step (ii) are a high-speed shear reaction at 45℃~90℃ and 6000rpm~15000rpm for 1h~8h, preferably a high-speed shear reaction at 60℃~80℃ and 10000rpm~13000rpm for 3h~5h.

[0029] Further, the carrier gas in step (ii) is an inert gas or high-purity nitrogen, preferably high-purity nitrogen with a purity of 99% vol or higher; wherein the inert gas is selected from either high-purity helium or high-purity argon. The flow rate ratio of the composite phase change material to the carrier gas is 1 g composite phase change material : (1 mL / min ~ 10 mL / min) carrier gas, preferably 1 g composite phase change material : (3 mL / min ~ 6 mL / min) carrier gas.

[0030] Further, after the reaction in step (ii) is completed, the material undergoes conventional treatment, such as filtration and repeated rinsing with anhydrous ethanol, followed by drying. The drying is preferably carried out in a vacuum environment with a vacuum degree of 100 Pa to 300 Pa, at a vacuum drying temperature of 60°C to 80°C, for a drying time of 10 h to 15 h, to obtain the phase change microcapsule material.

[0031] Further, in step (1), the water is selected from at least one of tap water, well water and river water, and the starch is selected from at least one of corn starch, potato starch and wheat starch.

[0032] Further, in step (1), the mass ratio of the phase change microcapsule material, water, and starch is 1:(10-100):(1.5-7), preferably 1:(50-80):(3-5).

[0033] Further, in step (1), the temperature of the heating and stirring reaction is 50℃~96℃, preferably 80℃~93℃, the stirring speed is 600rpm~800rpm, and the reaction time is 25min~75min, preferably 40min~60min.

[0034] Further, in step (2), the mass ratio of the product obtained in step (1) to the straw tube is 1:(1-10), preferably 1:(3-6).

[0035] Furthermore, in step (2), the length of the cut composite straw material is 10mm to 20mm.

[0036] Furthermore, in step (3), the ratio of the indoor ground soil area to the mass of the composite straw material in the greenhouse is 1m². 2 (50-350)g, preferably 1m 2 : (150~280)g.

[0037] This invention relates to a method for laying the indoor floor of a phase change passive facility agricultural building, which falls within the technical field of phase change passive facility agricultural building construction system methods.

[0038] The heat storage capacity (i.e., latent heat value of phase change) of the indoor floor of the phase change passive facility agricultural house laid by the method provided by the present invention is greater than 35J / g, preferably 50J / g to 70J / g.

[0039] The method provided by this invention lays the indoor floor of a phase change passive facility agricultural house. After application inside the house, the average indoor temperature is 18℃~28℃, the relative humidity is 55%~77%, the indoor PM2.5 value is 25~45, the free amino acid nitrogen content in the soil topsoil is 2.2μg N / g~2.8μg N / g, and the threshold (CT value) of bacterial wilt pathogen in the soil topsoil is 5.6~7.8.

[0040] In this invention, after the indoor floor of the phase change passive facility agriculture house is laid, the indoor average temperature refers to the average temperature range over a year.

[0041] Compared with the prior art, the present invention has the following advantages:

[0042] (1) The indoor flooring of this invention contains phase change microcapsule material. The composite phase change core material is prepared by co-melting inorganic hydrated salts and sugar alcohols. Sugar alcohols, as both phase change materials and heterogeneous nucleation materials, can overcome the shortcomings of supercooling and phase separation in inorganic hydrated salts, resulting in a composite phase change core material with good heat storage capacity and recyclability. Preferably, the composite phase change core material is encapsulated through complexation coordination and initiator induction during the preparation of the phase change microcapsule shell. The microporous structure in the shell can adsorb PM2.5 particles in the indoor air, purifying the indoor air. Simultaneously, the metal complex units in the shell structure possess a certain number of active sites, which can also combine with moisture in the indoor air, automatically regulating indoor humidity. Furthermore, the indoor flooring of this invention for passive phase change facility agriculture can inhibit harmful soil bacteria and replenish soil fertility.

[0043] (2) The present invention mixes phase change microcapsule material with water and starch and injects it into straw tube, which can adhere well to the straw and prevent the phase change microcapsule material from being damaged and lost during use, especially during the tillage stage.

[0044] (3) The phase change passive facility agriculture house indoor floor paving designed and prepared by the present invention has the characteristics of novel concept, comprehensive functional service and good environmental performance, and is suitable for different application scenarios under various climatic conditions. Detailed Implementation

[0045] The following examples further illustrate the preparation method and effects of the indoor floor paving for phase change passive facility agriculture houses according to the present invention. These examples are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following examples.

[0046] Unless otherwise specified, the experimental methods used in the following examples are conventional methods in the art. Unless otherwise specified, the experimental materials used in the following examples were purchased from conventional biochemical reagent stores.

[0047] In this invention, a DSC-60Plus differential scanning calorimeter manufactured by Shimadzu Corporation of Japan was used to determine the latent heat of phase change (i.e., heat storage capacity) of the heat storage material. The test temperature range was 0℃ to 100℃, the heating rate was 10℃ / min, and high-purity nitrogen was used as the carrier gas for protection.

[0048] In this invention, an ITHX-SD temperature and humidity chart logger manufactured by OMEGA Corporation of the United States is used to monitor the temperature and humidity trends inside a phase change passive facility agriculture building. The logger has a resolution of 0.1℃ / 0.1%, a temperature response time of 5s, and a humidity response time of 8s.

[0049] In this invention, the BYC300-CX PM2.5 environmental monitor manufactured by Shenzhen Aiersen Environmental Protection Technology Co., Ltd. is used to monitor PM2.5 levels inside a phase-change passive facility agriculture building. The monitor has a measurement accuracy of ±10% and a measurement range of 0–1000 μg / m³. 3 .

[0050] In this invention, a colorimetric method is used to detect the content of free amino acid nitrogen in the topsoil. In a sodium acetate-acetic acid buffer solution with a pH of 4.8, amino acid nitrogen reacts with acetylacetone and formaldehyde to generate a yellow 3,5-diacetyl-2,6-dimethyl-1,4-dihydropyridine amino acid derivative. The absorbance is measured at a wavelength of 400 nm and compared with a standard for quantification.

[0051] In this invention, a secondary quantitative PCR method was used to determine the threshold (CT value) of *Ralstonia solanacearum* in the topsoil. The collected soil was air-dried, ground and mixed in a mortar, and 0.5g of soil genomic DNA was extracted using the Omega Bio-tek Soil DNA Kit D5625. The DNA concentration and quality were determined using Nanodrop One. 100ng of soil template DNA was added to each system for PCR reaction, and 1μL of the PCR product was used as a template for quantitative PCR to obtain the *Ralstonia solanacearum* threshold (CT value).

[0052] Example 1

[0053] Method for laying indoor floor of passive phase change facility agriculture house: Take 1000g sodium sulfate decahydrate and 12g D-threitol and place them in a vacuum drying oven with a vacuum degree of 200Pa. Heat and melt them together at 100℃ for 5h to obtain composite phase change material. At the same time, high-purity nitrogen (99% vol or above) is introduced for protection. The flow rate ratio of composite phase change material to high-purity nitrogen is 1g: 4.5mL / min. Weigh out 100g of zinc nitrate hexahydrate, 45g of silver nitrate, 60g of pyromellitic acid, 16g of aspartic acid, and 4000g of deionized water, mix them, and place them in a sealed, automatically stirred reactor. React at 75℃ and 300rpm for 10h. Take 100g of the mixture and mix it with 30g of composite phase change material and 5g of azobisisobutyronitrile (AIBN). React at 70℃ and 11500rpm for 4h under high-speed shearing, while maintaining the flow of high-purity nitrogen (99% vol or higher). The flow rate ratio of composite phase change material to high-purity nitrogen is 1g:4mL / min. After the reaction, filter the mixture and wash it repeatedly with anhydrous ethanol. Place it in a vacuum drying oven with a vacuum degree of 200Pa and dry it at 70℃ for 12h to obtain the phase change microcapsule material. Then mix 100g of the phase change microcapsule material, 6500g of tap water, and 400g of corn starch, and heat the mixture at 90℃ for 50min with a stirring speed of 700rpm. 100g of the mixture was injected into a 400g straw tube using a syringe pump and dried at 25℃ for 10 hours. The straw material was then cut into 15mm pieces using a cutting machine for later use. 200g of the cut composite straw material was then mixed with 1m... 2 The soil inside the greenhouse is mixed evenly, completing the indoor floor paving work for the phase change passive facility agriculture building.

[0054] Example 2

[0055] Method for laying indoor floor of passive phase change facility agriculture house: Take 1000g sodium sulfate decahydrate and 9g D-threitol and place them in a vacuum drying oven with a vacuum degree of 200Pa. Heat and melt them together at 100℃ for 5h to obtain composite phase change material. At the same time, high-purity nitrogen (99% vol or above) is introduced for protection. The flow rate ratio of composite phase change material to high-purity nitrogen is 1g: 4.5mL / min. Weigh out 100g of zinc nitrate hexahydrate, 35g of silver nitrate, 50g of pyromellitic acid, 14g of aspartic acid, and 3500g of deionized water, mix them, and place them in a sealed, automatically stirred reactor. React at 75℃ and 300rpm for 10h. Take 100g of the mixture and mix it with 30g of composite phase change material and 5g of azobisisobutyronitrile (AIBN). React at 70℃ and 11500rpm for 4h under high-speed shearing, while maintaining the flow of high-purity nitrogen (99% vol or higher). The flow rate ratio of composite phase change material to high-purity nitrogen is 1g:4mL / min. After the reaction, filter the mixture and wash it repeatedly with anhydrous ethanol. Place it in a vacuum drying oven with a vacuum degree of 200Pa and dry it at 70℃ for 12h to obtain the phase change microcapsule material. Then mix 100g of the phase change microcapsule material, 5000g of tap water, and 300g of corn starch, and heat the mixture at 90℃ for 50min with a stirring speed of 700rpm. 100g of the mixture was injected into a 400g straw tube using a syringe pump and dried at 25℃ for 10 hours. The straw material was then cut into 15mm pieces using a cutting machine for later use. 150g of the cut composite straw material was then mixed with 1m... 2 The soil inside the greenhouse is mixed evenly, completing the indoor floor paving work for the phase change passive facility agriculture building.

[0056] Example 3

[0057] Method for laying indoor floor of passive phase change facility agriculture house: Take 1000g sodium sulfate decahydrate and 18g D-threitol and place them in a vacuum drying oven with a vacuum degree of 200Pa. Heat and melt them together at 100℃ for 5h to obtain composite phase change material. At the same time, high-purity nitrogen (99% vol or above) is introduced for protection. The flow rate ratio of composite phase change material to high-purity nitrogen is 1g: 4.5mL / min. Weigh out 100g of zinc nitrate hexahydrate, 50g of silver nitrate, 75g of pyromellitic acid, 18g of aspartic acid, and 5000g of deionized water, mix them, and place them in a sealed, automatically stirred reactor. React at 75℃ and 300rpm for 10h. Take 100g of the mixture and mix it with 30g of composite phase change material and 5g of azobisisobutyronitrile (AIBN). React at 70℃ and 11500rpm for 4h under high-speed shearing, while maintaining the flow of high-purity nitrogen (99% vol or higher). The flow rate ratio of composite phase change material to high-purity nitrogen is 1g:4mL / min. After the reaction, filter the mixture and wash it repeatedly with anhydrous ethanol. Place it in a vacuum drying oven with a vacuum degree of 200Pa and dry it at 70℃ for 12h to obtain the phase change microcapsule material. Then mix 100g of the phase change microcapsule material, 8000g of tap water, and 500g of corn starch, and heat the mixture at 90℃ for 50min with a stirring speed of 700rpm. 100g of the mixture was injected into a 400g straw tube using a syringe pump and dried at 25℃ for 10 hours. The straw material was then cut into 15mm pieces using a cutting machine for later use. 280g of the cut composite straw material was then mixed with 1m... 2 The soil inside the greenhouse is mixed evenly, completing the indoor floor paving work for the phase change passive facility agriculture building.

[0058] Example 4

[0059] Similar to Example 1, except that in the method for laying the indoor floor of the phase change passive facility agriculture house, the amount of D-threitol is reduced to 5g, the flow rate ratio of composite phase change material to high-purity nitrogen is increased to 1g:15mL / min, and other reaction conditions and material composition remain unchanged, thus completing the indoor floor laying work of the phase change passive facility agriculture house.

[0060] Example 5

[0061] Similar to Example 1, except that in the method for laying the indoor floor of the phase change passive facility agriculture house, the mass of silver nitrate is reduced to 15g, the mass of pyromellitic acid is increased to 95g, the mass of aspartic acid is increased to 23g, and the mass of deionized water is reduced to 2500g, while other reaction conditions and material composition remain unchanged, thus completing the indoor floor laying work of the phase change passive facility agriculture house.

[0062] Example 6

[0063] Similar to Example 1, the difference lies in the method for laying indoor floors of phase change passive facility agriculture houses. In this method, the mass of the composite phase change material is reduced to 10g, the mass of azobisisobutyronitrile is increased to 8g, and the flow rate ratio of the composite phase change material to high-purity nitrogen is reduced to 1g:1mL / min. Other reaction conditions and material composition remain unchanged, thus completing the laying of indoor floors of phase change passive facility agriculture houses.

[0064] Example 7

[0065] Similar to Example 1, the difference lies in the method of laying indoor floors of phase change passive facility agriculture houses. The mass of tap water is reduced to 1000g, the mass of corn starch is reduced to 150g, the heating temperature is increased to 96℃, and the reaction time is extended to 75min. Other reaction conditions and material composition remain unchanged, thus completing the laying of indoor floors of phase change passive facility agriculture houses.

[0066] Example 8

[0067] Similar to Example 1, except that in the method for laying the indoor floor of a phase change passive facility agricultural building, the amount of cut composite straw material is reduced to 50g, while other reaction conditions and material composition remain unchanged, thus completing the indoor floor laying work of the phase change passive facility agricultural building.

[0068] Comparative Example 1

[0069] Compared with Example 1, the difference lies in the fact that D-threitol is omitted in the process of synthesizing phase change microcapsule materials, while other reaction conditions and material composition remain unchanged, and the indoor flooring work of phase change passive facility agriculture houses is completed.

[0070] Comparative Example 2

[0071] Compared with Example 1, the difference lies in the fact that silver nitrate is omitted in the process of synthesizing phase change microcapsule materials, while other reaction conditions and material composition remain unchanged, thus completing the indoor floor paving work of phase change passive facility agriculture houses.

[0072] Comparative Example 3

[0073] Compared with Example 1, the difference lies in the fact that aspartic acid is omitted in the process of synthesizing phase change microcapsule materials, while other reaction conditions and material composition remain unchanged, thus completing the indoor floor paving work of phase change passive facility agriculture houses.

[0074] Comparative Example 4

[0075] Similar to Example 1, the difference lies in the method of laying indoor floors of phase change passive facility agriculture houses. In this method, the phase change microcapsule material is omitted, and only straw filled with corn starch is laid on the indoor floor of the facility agriculture house. Other reaction conditions and material composition remain unchanged, thus completing the laying of indoor floors of phase change passive facility agriculture houses.

[0076] In this invention, in all embodiments and comparative examples of phase-change passive facility agriculture houses, the walls and ground form a cubic shape. The frame is a 12m long, 4.5m wide, east-west oriented rectangular hot-dip galvanized steel structure frame with a height of 3.3m. The walls are made of 4mm thick double-layered hollow tempered glass with a 6mm gap between the glass panes, and the joints are made of steel. Five square ventilation windows with sides of 40cm are installed on the south and north sides of the walls, equipped with fans for ventilation, providing fresh air at a rate of 1.25 times / min. The roof can be a flat roof, pitched roof, curved roof, or multi-wave folded plate roof. The house tested here has a flat roof with 5mm thick double-layered hollow tempered glass and an 8mm gap between the glass panes. In winter (December to February of the following year), a 25μm thick conventional heat-absorbing film (PTFE film) needs to be covered on top of the roof glass. The flooring method follows the corresponding embodiment or comparative example.

[0077] Test Example 1

[0078] The performance of the phase change passive facility agriculture houses in Examples 1-8 and Comparative Examples 1-4 was measured, and the specific results are shown in Table 1.

[0079] Table 1. Performance of Phase Change Passive Facility Agricultural Buildings Prepared in Examples and Comparative Examples

[0080]

[0081]

[0082] Table 1 shows that the test was conducted in Dalian on a sunny day in January. According to local meteorological data, the test time was from 0:00 to 23:00, with an average outdoor temperature of -9.8℃ and an average outdoor relative humidity of 50%.

[0083] As shown in Table 1, the phase change passive facility agriculture house prepared by the method of the present invention has good performance. In Example 1, the average indoor temperature of the phase change passive facility agriculture house in winter was 23.7℃, the relative humidity was 63.8%, the indoor PM2.5 value was 25, the free amino acid nitrogen content in the soil topsoil was 2.8 μg N / g, and the threshold (CT value) of bacterial wilt pathogen in the soil topsoil was 5.6. The performance indicators of the comparative example sample were significantly lower than those of the example sample.

Claims

1. A method for laying the indoor floor of a phase-change passive facility agriculture building, comprising the following steps: (1) Synthesize phase change microcapsule materials, then mix them with water and starch, and heat and stir to react; (2) The material obtained in step (1) is injected into the straw tube to obtain composite straw material, dried, and then the composite straw material is cut. (3) Mix the composite straw material cut in step (2) evenly with the soil on the ground inside the greenhouse; In step (1), the synthesis method of the phase change microcapsule material is as follows: (i) A composite phase change material is obtained by co-heating and melting a hydrated salt phase change material and a sugar alcohol phase change material, and then a carrier gas is introduced for protection. (ii) Take zinc salt, silver salt, organic ligand, amino acid and water and mix them to react. The mixture after reaction is mixed with the composite phase change material and initiator in step (i) under the protection of the carrier, and then subjected to high-speed shear reaction to obtain phase change microcapsule material.

2. The laying method according to claim 1, characterized in that, The phase change temperature range of the hydrated salt phase change material described in step (i) is 20℃~40℃; And / or, the phase transition temperature range of the sugar alcohol phase change material described in step (i) is 70°C to 120°C; And / or, the mass ratio of the hydrated salt phase change material to the sugar alcohol phase change material in step (i) is 1: (0.005 to 0.035).

3. The laying method according to claim 2, characterized in that, The hydrated salt phase change material mentioned in step (i) is selected from at least one of sodium sulfate decahydrate, calcium chloride hexahydrate, and disodium hydrogen phosphate dodecahydrate; And / or, the sugar alcohol phase change material described in step (i) is selected from at least one of D-threitol, xylitol, and erythritol; And / or, the mass ratio of the hydrated salt phase change material to the sugar alcohol phase change material in step (i) is 1: (0.009 to 0.018).

4. The laying method according to claim 1, characterized in that, The co-heating melting reaction in step (i) is carried out at 90℃~125℃ for 3h~6h; And / or, the carrier gas in step (i) is an inert gas or high-purity nitrogen.

5. The laying method according to claim 1, characterized in that, The zinc salt mentioned in step (ii) is selected from one or more of zinc nitrate hexahydrate, zinc chloride trihydrate, and zinc acetate dihydrate; And / or, the silver salt described in step (ii) is selected from one or more of silver nitrate, silver fluoride and silver perchlorate; And / or, the organic ligand in step (ii) is selected from one or more of terephthalic acid, pyromellitic acid and pyromellitic tetracarboxylic acid; And / or, the amino acid described in step (ii) is selected from amino acids with an average molecular weight of less than 200; And / or, the initiator described in step (ii) is selected from one or more of azobisisobutyronitrile, lauroyl peroxide and sodium bisulfite.

6. The laying method according to claim 5, characterized in that, The amino acid mentioned in step (ii) is selected from one or more of aspartic acid, lysine and L-cysteine.

7. The laying method according to claim 1, characterized in that, The zinc salt, silver salt, organic ligand, amino acid, and water described in step (ii) are mixed in a mass ratio of 1:(0.15–0.75):(0.35–0.95):(0.08–0.23):(25–85); And / or, the reaction described in step (ii) is carried out at 65°C to 85°C and 200 rpm to 400 rpm for 8 h to 12 h; And / or, the mass ratio of the reacted mixture, composite phase change material, and initiator in step (ii) is 1:(0.1-0.6):(0.01-0.08); And / or, the carrier gas in step (ii) is an inert gas or high-purity nitrogen; the flow rate ratio of composite phase change material to carrier gas is 1g composite phase change material: (1mL / min~10mL / min) carrier gas; And / or, the conditions for the high-speed shear reaction described in step (ii) are a high-speed shear reaction at 45°C to 90°C and 6000 rpm to 15000 rpm for 1 h to 8 h.

8. The laying method according to claim 1, characterized in that, In step (1), the water is selected from at least one of tap water, well water and river water, and the starch is selected from at least one of corn starch, potato starch and wheat starch; And / or, in step (1), the mass ratio of the phase change microcapsule material, water, and starch is 1:(10-100):(1.5-7).

9. The laying method according to claim 1, characterized in that, In step (1), the temperature of the heating and stirring reaction is 50℃~96℃, the stirring speed is 600rpm~800rpm, and the reaction time is 25min~75min.

10. The laying method according to claim 1, characterized in that, In step (2), the mass ratio of the product obtained in step (1) to the straw tube is 1:(1~10). And / or, in step (2), the length of the cut composite straw material is 10mm to 20mm.

11. The laying method according to claim 1, characterized in that, In step (3), the ratio of the indoor soil area to the mass of the composite straw material in the greenhouse is 1 m². 2 : (50~350)g.

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