Method for improving carbon sequestration and sink of cypress

Abstract

The application discloses a method for improving carbon sequestration and sink of cupressus funebris, and belongs to the technical field of forestry, and comprises the following steps: (1) cultivating and managing sink: pruning, cutting, fertilizing, preventing and treating diseases and pests and the like of the cupressus funebris, and improving the growth of the cupressus funebris; and (2) spraying a carbon sequestration agent to improve sink: spraying the carbon sequestration agent to the managed cupressus funebris, improving photosynthetic efficiency, and solving the problem of low carbon sequestration capacity of the cupressus funebris.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of forestry, and in particular to a method for improving carbon sequestration of Cupressus funebris. BACKGROUND

[0002] The forest ecosystem is the main body of the terrestrial ecosystem and is the main carbon storage of the terrestrial ecosystem. Forest carbon sink refers to the absorption of carbon dioxide in the atmosphere by forest plants and the fixation of the carbon dioxide in vegetation or soil, thereby reducing the concentration of the gas in the atmosphere. Forests are the largest carbon sink in the terrestrial ecosystem and have a very important and unique role in reducing the concentration of greenhouse gases in the atmosphere and mitigating global climate warming. Observation studies have shown that the carbon fixed under photosynthesis is redistributed to four carbon pools of the forest ecosystem: the vegetation carbon pool, the soil carbon pool, the litter carbon pool, and the animal carbon pool. Through the development of sustainable forest management, the quality of forests is improved, and the various service functions of the forest ecosystem, especially the forest carbon sink function, are enhanced, which is one of the main measures to achieve the "carbon peak and carbon neutralization" goal.

[0003] Cupressus funebris Endl. is a tree of the Cupressaceae family and is one of the main afforestation and timber tree species in China. Through the development of forest management, the increment of Cupressus funebris Endl. is improved, the carbon sequestration potential of Cupressus funebris Endl. is enhanced, the forest resource reserve is strengthened, the sustainable utilization of forest resources is realized, and the protection and utilization of the forest ecosystem are promoted. Therefore, the present application provides a method for improving carbon sequestration of Cupressus funebris Endl., which promotes photosynthesis of Cupressus funebris Endl., improves the increment and carbon sequestration capacity of Cupressus funebris Endl., and promotes the carbon sequestration effect of Cupressus funebris Endl. SUMMARY

[0004] In view of this, the purpose of the present application is to provide a method for improving carbon sequestration of Cupressus funebris Endl. to solve the problem of low carbon sequestration capacity of Cupressus funebris Endl.

[0005] The present application solves the above technical problems through the following technical means:

[0006] A method for improving carbon sequestration of Cupressus funebris Endl., the method comprising the following steps:

[0007] (1) Cultivation and management of sequestration: pruning Cupressus funebris Endl., cutting off abnormal, curved or undesirable branches, removing unhealthy parts, promoting effective photosynthesis of Cupressus funebris Endl., and performing management such as cutting, fertilization, and pest control to improve the growth of Cupressus funebris Endl.;

[0008] (2) Sequestration agent spraying for sequestration: spraying a sequestration agent on the managed Cupressus funebris Endl. to improve photosynthetic efficiency.

[0009] Through the cultivation and management of cypress, pruning to remove weak branches and dense branches can improve the ventilation and light conditions in the forest, so that the lower cypress needles can also fully receive sunlight, which is beneficial to the more effective photosynthesis of cypress, and cooperates with the measures of cutting and fertilizing to promote the absorption and fixation of carbon dioxide by cypress needles, thereby enhancing the carbon sequestration capacity of cypress. However, the carbon sequestration capacity of cypress is only slightly improved by the cultivation and management of cypress forest, so the carbon sequestration agent can be sprayed on the cypress to improve the carbon sequestration capacity of the cypress, thereby improving the carbon sink function of the forest and promoting the sustainable management of the forest.

[0010] Further, the cypress is a cypress of 5 years or more.

[0011] Further, the use method of the carbon sequestration agent is to dilute the carbon sequestration agent with water by 100 times to obtain a carbon sequestration agent diluent, and then uniformly spray the carbon sequestration agent diluent on the surface of the cypress needles.

[0012] Further, the carbon sequestration agent is sprayed every other month.

[0013] In order to prevent the loss of carbon sequestration agent on the cypress needles caused by rain erosion and insect attack, the carbon sequestration agent is sprayed on the cypress regularly, so that the carbon sequestration agent can act on the cypress needles for a long time, and promote the carbon sequestration of the cypress.

[0014] Further, the carbon sequestration agent comprises the following raw materials: nano titanium dioxide, sunflower glycoside, L-menthol, casein, mannitol, palm oil, glycerol stearate, and pachymaran.

[0015] Further, the raw material ratio of the carbon sequestration agent is as follows: the mass ratio of nano titanium dioxide, sunflower glycoside, L-menthol, casein, mannitol, palm oil, and pachymaran is (1-1.5):(1.2-1.6):(0.8-1):(1-1.2):(0.7-0.8):(1.2-1.5):(4-5).

[0016] Further, the preparation method of the carbon sequestration agent is as follows:

[0017] (1) Add casein to a 1wt% sodium chloride solution, mix uniformly to obtain a casein solution, then add mannitol and sunflower glycoside to the casein solution, and stir uniformly to obtain solution A;

[0018] (2) Heat solution A to a temperature of 70-80℃, slowly add the mixed oil of glycerol stearate and palm oil to solution A, keep the temperature and stir for 15-20min to obtain an emulsion;

[0019] (3) Sprinkle the curbing carbon agent on the surface of the cypress needle, and the curbing carbon agent can form a film on the surface of the cypress needle, adhere to the surface of the cypress needle, enhance the photosynthesis of the cypress, and improve the carbon sequestration capacity of the cypress.

[0020] Further, the mass ratio of the added amount of the glycerol stearate to the palm oil is 1:20.

[0021] Further, the particle size of the nano-titanium dioxide is 20-50 nm.

[0022] The curbing carbon agent in the present application is sprayed on the surface of the cypress needle, and the curbing carbon agent can form a film on the surface of the cypress needle, adhere to the surface of the cypress needle, enhance the photosynthesis of the cypress, and improve the carbon sequestration capacity of the cypress. The nano-titanium dioxide in the curbing carbon agent can enhance the light absorption of the cypress needle and improve the utilization efficiency of light energy, thereby promoting the photosynthesis. However, the surface of the cypress needle is covered with a layer of wax, making it difficult for the curbing carbon agent to adhere to the surface of the leaf for a long time. Therefore, sunflower glycoside is added to the curbing carbon agent, which can promote the dissolution of unsaturated fatty acids on the surface of the wax layer. At the same time, the palm oil in the curbing carbon agent and the dissolved fatty acids on the surface of the wax layer are fused with each other, so that the curbing carbon agent can tightly adhere to the surface of the wax layer of the cypress needle to form a dense oil film, which has strong adhesion and is not easy to fall off, and can effectively act on the cypress for a long time, prolonging the action time. However, the too dense film on the surface of the cypress needle will lead to a decrease in the respiration efficiency of the cypress, affecting the growth of the cypress. Therefore, L-menthol is added during the preparation of the curbing carbon agent. After the curbing carbon agent is sprayed on the surface of the cypress needle, the L-menthol gradually volatilizes to form a porous film on the surface of the cypress needle, maintaining the gas exchange and light energy reception of the cypress needle to ensure the normal photosynthesis and respiration of the cypress. In addition, since the curbing carbon agent is prepared by mixing emulsion, the prepared curbing carbon agent will stratify during storage. Therefore, casein is added to the curbing carbon agent. The casein can uniformly disperse in the emulsion to form a three-dimensional network structure, which can adsorb and fix particles, prevent the precipitation and aggregation of nano-titanium dioxide, and make the nano-titanium dioxide uniformly disperse in the emulsion. At the same time, the casein can also improve the adhesion between the curbing carbon agents, inhibit the stratification of the curbing carbon agents, and keep the curbing carbon agents in a uniform state. Mannitol is also added to the curbing carbon agent, which can interact with water molecules to reduce the flowability of the curbing carbon agent, thereby preventing the stratification of the curbing carbon agent and maintaining the stability of the curbing carbon agent.

[0023] Beneficial effects:

[0024] The carbon fixation agent prepared in the application can effectively promote the photosynthesis of cupressus, improve the utilization efficiency of light energy, and further improve the carbon fixation and sink capacity of cupressus. Meanwhile, the carbon fixation agent prepared in the application can also be applied to other plants in the forest ecosystem, enhance the carbon fixation capacity of plants, enhance the carbon sink capacity of the forest ecosystem, and promote the development of sustainable forest management. DETAILED DESCRIPTION

[0025] The application will be described in detail below in combination with specific embodiments:

[0026] Embodiment 1:

[0027] Preparation of the carbon fixation agent:

[0028] (1) 1g of casein was added to 100ml of 1wt% sodium chloride solution, mixed uniformly to obtain a casein solution, then 0.7g of mannitol and 1.2g of helianthyl glucoside were added to the casein solution, and stirred uniformly to obtain solution A;

[0029] (2) The temperature of solution A was heated to 70℃, and a mixed oil of 0.06g of glyceryl stearate and 1.2g of palm oil was slowly added to solution A, and stirred for 15min at the temperature, to obtain an emulsion;

[0030] (3) 4g of curdlan, 1g of 20nm nano-titanium dioxide and 0.8g of L-menthol were added to the emulsion, and stirred for 20min under the condition of a magnetic stirrer at 1000rpm, and then cooled to room temperature, to obtain the carbon fixation agent.

[0031] Method for carbon fixation and sink of cupressus:

[0032] (1) Cultivation and management for sink: 5-year-old cupressus was pruned, and abnormal, curved or poor branches and unhealthy parts were removed, to promote the effective photosynthesis of cupressus, and management such as cutting, fertilization and pest control was performed, to improve the growth of cupressus;

[0033] (2) Spraying of carbon fixation agent for sink: the carbon fixation agent was diluted 100 times with water to obtain a carbon fixation agent diluent, which was uniformly sprayed on the surface of the needle leaves of cupressus, about 4kg of the carbon fixation agent diluent was sprayed on each cupressus, and spraying was performed once every other month.

[0034] Embodiment 2:

[0035] Preparation of the carbon fixation agent:

[0036] (1) 1.1g of casein was added to 110ml of 1wt% sodium chloride solution, mixed uniformly to obtain a casein solution, then 0.75g of mannitol and 1.4g of helianthyl glucoside were added to the casein solution, and stirred uniformly to obtain solution A;

[0037] (2) heating solution A to 75°C, slowly adding 0.067 g glyceryl stearate and 1.35 g mixed oil of palm oil to solution A, keeping temperature stirring for 18 min, obtaining emulsion;

[0038] (3) adding 4.5 g curdlan, 1.25 g nano titanium dioxide of about 35 nm, 0.9 g L-menthol to the emulsion, stirring under the condition of magnetic stirrer 1100 rpm for 25 min, and then cooling to room temperature, obtaining carbon sequestration agent.

[0039] The carbon sequestration and sink increasing method of cypress:

[0040] (1) cultivation management sink increasing: pruning 6-year-old cypress, cutting off abnormal, curved or undesirable branches, removing unhealthy parts, promoting effective photosynthesis of cypress, and performing management such as cutting, fertilization, disease and pest control, and improving the growth of cypress;

[0041] (2) carbon sequestration agent spraying: diluting the carbon sequestration agent 100 times with water to obtain carbon sequestration agent diluent, and uniformly spraying the carbon sequestration agent diluent on the surface of the cypress needle leaves, about 4.1 kg of carbon sequestration agent diluent per cypress, and spraying once every other month.

[0042] Example 3:

[0043] Preparation of carbon sequestration agent:

[0044] (1) adding 1.2 g casein to 120 ml of 1 wt% sodium chloride solution to obtain casein solution, and then adding 0.8 g mannitol, 1.6 g cucurbitin to the casein solution, stirring uniformly to obtain solution A;

[0045] (2) heating solution A to 80°C, slowly adding 0.075 g glyceryl stearate and 1.5 g mixed oil of palm oil to solution A, keeping temperature stirring for 20 min, obtaining emulsion;

[0046] (3) adding 5 g curdlan, 1.5 g nano titanium dioxide of about 50 nm, 1 g L-menthol to the emulsion, stirring under the condition of magnetic stirrer 1200 rpm for 30 min, and then cooling to room temperature, obtaining carbon sequestration agent.

[0047] The carbon sequestration and sink increasing method of cypress:

[0048] (1) cultivation management sink increasing: pruning 8-year-old cypress, cutting off abnormal, curved or undesirable branches, removing unhealthy parts, promoting effective photosynthesis of cypress, and performing management such as cutting, fertilization, disease and pest control;

[0049] (2) Carbon sequestration agent spraying: dilute the carbon sequestration agent with water to obtain a carbon sequestration agent diluent, and then uniformly spray the carbon sequestration agent diluent on the surface of the cypress needles. Each cypress is sprayed with about 4.2 kg of carbon sequestration agent diluent, and the spraying is performed every other month.

[0050] Comparative Example 1

[0051] This comparative example is compared with Example 1, and the only difference is that the raw materials of the carbon sequestration agent are different, specifically, no L-menthol is added. The specific method is as follows:

[0052] (1) 1 g of casein was added to 100 ml of a 1 wt% sodium chloride solution, mixed uniformly to obtain a casein solution, and then 0.7 g of mannitol and 1.2 g of helicid were added to the casein solution, stirred uniformly to obtain solution A;

[0053] (2) Heat solution A to 70°C, slowly add a mixture of 0.06 g of glyceryl stearate and 1.2 g of palm oil to solution A, keep the temperature and stir for 15 min to obtain an emulsion;

[0054] (3) 4 g of curdlan, 1 g of 20 nm or so nano titanium dioxide, and 0.8 g of L-menthol were added to the emulsion, stirred at 1000 rpm on a magnetic stirrer for 20 min, and then cooled to room temperature to obtain a carbon sequestration agent.

[0055] The carbon sequestration and sink increasing method of the cypress of this comparative example is the same as that of Example 1.

[0056] Comparative Example 2

[0057] This comparative example is compared with Example 1, and the only difference is that the raw materials of the carbon sequestration agent are different, specifically, no L-menthol is added. The specific method is as follows:

[0058] (1) 1 g of casein was added to 100 ml of a 1 wt% sodium chloride solution, mixed uniformly to obtain a casein solution, and then 0.7 g of mannitol and 1.2 g of helicid were added to the casein solution, stirred uniformly to obtain solution A;

[0059] (2) Heat solution A to 70°C, slowly add a mixture of 0.06 g of glyceryl stearate and 1.2 g of palm oil to solution A, keep the temperature and stir for 15 min to obtain an emulsion;

[0060] (3) 4 g of curdlan, 1 g of 20 nm or so nano titanium dioxide, and 0.8 g of L-menthol were added to the emulsion, stirred at 1000 rpm on a magnetic stirrer for 20 min, and then cooled to room temperature to obtain a carbon sequestration agent.

[0061] The carbon sequestration and sink increasing method of the cypress of this comparative example is the same as that of Example 1.

[0062] Comparative Example 3:

[0063] This comparative example is contrasted with Example 1, the only difference being that the raw material of the carbon sequestration agent is different, specifically, no jatropha oil is added, and the specific method is as follows:

[0064] (1) 1 g of casein was added to 100 ml of a 1 wt% sodium chloride solution, mixed uniformly to obtain a casein solution, then 0.7 g of mannitol and 1.2 g of heliotropin were added to the casein solution, and stirred uniformly to obtain solution A;

[0065] (2) 4 g of curdlan, 1 g of 20 nm or so nano titanium dioxide, and 0.8 g of L-menthol were added to solution A, stirred at 1000 rpm on a magnetic stirrer for 20 min, then cooled to room temperature to obtain a carbon sequestration agent.

[0066] The method of carbon sequestration and sink increase of cypress in this comparative example is the same as that in Example 1.

[0067] Comparative Example 4:

[0068] This comparative example is contrasted with Example 1, the only difference being that the raw material of the carbon sequestration agent is different, specifically, no casein is added, and the specific method is as follows:

[0069] (1) 0.7 g of mannitol was mixed with 100 ml of water to obtain a mannitol solution, then 1.2 g of heliotropin was added to the mannitol solution, and stirred uniformly to obtain solution A;

[0070] (2) Solution A was heated to 70°C, and a mixed oil of 0.06 g of glyceryl stearate and 1.2 g of palm oil was slowly added to solution A, and stirred for 15 min while maintaining the temperature, to obtain an emulsion;

[0071] (3) 4 g of curdlan, 1 g of 20 nm or so nano titanium dioxide, and 0.8 g of L-menthol were added to the emulsion, stirred at 1000 rpm on a magnetic stirrer for 20 min, then cooled to room temperature to obtain a carbon sequestration agent.

[0072] The method of carbon sequestration and sink increase of cypress in this comparative example is the same as that in Example 1.

[0073] Comparative Example 5:

[0074] This comparative example is contrasted with Example 1, the only difference being that the raw material of the carbon sequestration agent is different, specifically, no mannitol is added, and the specific method is as follows:

[0075] (1) 1 g of casein was added to 100 ml of a 1 wt% sodium chloride solution, mixed uniformly to obtain a casein solution, then 1.2 g of heliotropin was added to the casein solution, and stirred uniformly to obtain solution A;

[0076] (2) Heat solution A to 70°C, slowly add 0.06 g glyceryl stearate and 1.2 g palm oil mixed oil into solution A, keep temperature stirring for 15 min, get emulsion;

[0077] (3) Add 4 g curdlan, 1 g nano titanium dioxide of about 20 nm, 0.8 g L-menthol into the emulsion, stir under the condition of magnetic stirrer 1000 rpm for 20 min, then cool to room temperature, get carbon sequestration agent.

[0078] The carbon sequestration and sink increasing method of cedar of the present comparative example is the same as that of example 1.

[0079] Comparative example 6:

[0080] The present comparative example is compared with example 1, the only difference is that the process of preparing carbon sequestration agent is different, specifically, no stabilizing effect is given to the carbon sequestration agent, specifically, no casein and mannitol is added, the specific method is as follows:

[0081] (1) Mix 1.2 g helianthyl glucoside and 100 ml water uniformly to get solution A;

[0082] (2) Heat solution A to 70°C, slowly add 0.06 g glyceryl stearate and 1.2 g palm oil mixed oil into solution A, keep temperature stirring for 15 min, get emulsion;

[0083] (3) Add 4 g curdlan, 1 g nano titanium dioxide of about 20 nm, 0.8 g L-menthol into the emulsion, stir under the condition of magnetic stirrer 1000 rpm for 20 min, then cool to room temperature, get carbon sequestration agent.

[0084] The carbon sequestration and sink increasing method of cedar of the present comparative example is the same as that of example 1.

[0085] Comparative example 7:

[0086] The present comparative example is compared with example 1, the only difference is that the carbon sequestration agent is only made of curdlan, nano titanium dioxide and L-menthol, the specific method is as follows:

[0087] (1) Mix 4 g curdlan, 1 g nano titanium dioxide, 0.8 g L-menthol and 1 g polyvinyl alcohol with 100 ml water uniformly to get carbon sequestration agent.

[0088] The carbon sequestration and sink increasing method of cedar of the present comparative example is the same as that of example 1.

[0089] Experiment 1:

[0090] Cunninghamia lanceolata in Yunyang County of Chongqing was selected as the experimental object, the plant spacing between Cunninghamia lanceolata was 2m x 2m, one Cunninghamia lanceolata with a diameter at breast height of about 20cm was selected in each experimental group, and three repetitions were carried out. First, the Cunninghamia lanceolata was pruned, and the abnormal, curved or undesirable branches and unhealthy parts were removed, then the carbon sequestration agent was prepared according to the method of Example 1, Comparative Examples 1-7, the carbon sequestration agent was diluted 100 times with water to obtain a carbon sequestration agent diluent, and then the carbon sequestration agent diluent was uniformly sprayed on the needle leaf surface of the Cunninghamia lanceolata, about 4kg of carbon sequestration agent diluent was sprayed on each Cunninghamia lanceolata, and the Cunninghamia lanceolata was sprayed once every other month; the blank control was sprayed with water on the needle leaf surface of the Cunninghamia lanceolata, about 4kg of water was sprayed on each Cunninghamia lanceolata. Then the Cunninghamia lanceolata was sampled at 9:00-11:00 on the 1st day, 3rd day and 7th day (all sunny days) after spraying the carbon sequestration agent using Li6400XT portable photosynthesis instrument, the sampling site was the mature branches on the outer periphery of the canopy in the south direction, and the Cunninghamia lanceolata net photosynthetic rate was measured using Li6400XT portable photosynthesis instrument; then the sampled leaves were treated in darkness for 2h, and the dark respiration rate was measured in the dark environment, 3 mature leaves were measured for each tree, the average value of the measured data was taken as the result, and the results are shown in Table 1. The Cunninghamia lanceolata was cultivated and managed according to the method of Example 1, Comparative Examples 1-7, and the blank control for one year, and the Cunninghamia lanceolata was sprayed with the carbon sequestration agent once a month. According to the standard of "Biomass Model and Carbon Measurement Parameters of Main Tree Species", the initial carbon storage and the carbon storage after one year of management of the Cunninghamia lanceolata were detected, the carbon storage growth rate was calculated, the average value was taken as the result, and the results are shown in Table 1:

[0091] Table 1

[0092]

[0093]

[0094] From Table 1, it can be concluded that:

[0095] 1、Comparative Example 1 and Example 1, no sunflower glucoside is added, the amount of dissolved unsaturated fatty acid on the surface of the waxy layer is less, the waxy surface layer is smooth, and the carbon sequestration agent is difficult to adhere to the surface of the cypress needle for a long time, resulting in loss of the carbon sequestration agent, and the effective time of the carbon sequestration agent is short, so the photosynthetic rate gradually decreases, and the carbon sequestration amount growth rate is low. Moreover, due to the loss of the carbon sequestration agent, the surface film of the cypress needle gradually decreases, the exchange between the cypress needle and the external gas is enhanced, thereby leading to an increase in the dark respiration rate. Comparative Example 3 and Example 1, no abutilon oil is added, the amount of mutual mixing between the carbon sequestration agent and the dissolved fatty acid on the surface layer is less, the carbon sequestration agent forms a thin film on the surface of the cypress needle, which is easy to fall off, resulting in loss of the carbon sequestration agent, and the photosynthesis-enhancing effect is reduced. Comparative Example 2 and Example 1, no L-menthol is added, a dense film with strong adhesion is formed on the surface of the cypress needle, the gas permeation is reduced, leading to a decrease in the dark respiration rate of the cypress needle. The blank control uses water to spray the leaves, and the respiration rate of the cypress is not affected, so the dark respiration rate is high, but due to the absence of the carbon sequestration agent, the photosynthesis of the cypress is poor, and the net photosynthetic rate is low, only 2.88%. The carbon sequestration capacity of the cypress in Comparative Example 1 is good, and the carbon storage growth rate reaches 6.78%, indicating that the carbon sequestration agent prepared in Example 1 can effectively improve the carbon sequestration capacity of the cypress and promote the carbon sequestration of the cypress.

[0096] 2、Comparative Example 4 and Example 1, no casein is added, the nano-titanium dioxide in the carbon sequestration agent is prone to aggregation, resulting in uneven distribution of the effective component nano-titanium dioxide in the carbon sequestration agent, uneven effect of the sprayed carbon sequestration agent, and poor adhesion between the carbon sequestration agents, the carbon sequestration agent is prone to delamination, resulting in uneven distribution of the effective component on the cypress needle and difficulty in film formation, reduced effectiveness of the carbon sequestration agent, and less carbon sequestration growth. Comparative Example 5 and Example 1, no mannitol is added, the flowability of the carbon sequestration agent is good, and delamination of the carbon sequestration agent is prone to occur during storage, thereby reducing the effectiveness of the carbon sequestration agent. Comparative Example 6 and Example 1, no stabilizing effect is added to the carbon sequestration agent, specifically, no casein and mannitol are added, the stability of the carbon sequestration agent is poor, delamination is prone to occur, and the effective component nano-titanium dioxide is prone to aggregation, resulting in uneven effect of the carbon sequestration agent, poor use effect, and compared with Comparative Examples 4 and 5, the stability of the carbon sequestration agent in Comparative Example 6 is poorer, the improvement effect of the carbon sequestration capacity is poorer, and the carbon sequestration growth is lower.

[0097] 3、Comparative Example 7 and Example 1, the carbon sequestration agent is composed of curdlan, nano-titanium dioxide, and L-menthol, the carbon sequestration agent forms a gelatinous film on the surface of the cypress needle, which can promote photosynthesis of the cypress in the early stage, but due to the presence of a layer of wax on the surface of the cypress needle, the carbon sequestration agent is difficult to adhere to the surface of the leaf for a long time, the carbon sequestration agent gradually falls off, the photosynthetic rate of the cypress gradually decreases, and the respiration gradually increases, leading to a low carbon sequestration amount growth rate of the cypress in Comparative Example 7 and poor carbon sequestration effect.

[0098] Experiment 2:

[0099] In order to detect the stability effect of the carbon sequestration agent, the carbon sequestration agent prepared by Example 1, Comparative Examples 4-6 was poured into a transparent glass cup and placed, and the delamination phenomenon of the carbon sequestration agent was observed at 1h, 3h, 5h, 10h, respectively, and the delamination phenomenon is shown in Table 2:

[0100] Table 2

[0101]

[0102] From the analysis of Table 2, it can be seen that:

[0103] Comparative Example 4 did not add casein, and the adhesion between the phases of the carbon sequestration agent was poor, and delamination occurred easily during standing. Therefore, Comparative Example 4 slightly delaminated at 3h and completely delaminated at 10h. Comparative Example 5 did not add mannitol, and the flowability between the carbon sequestration agents was good, and delamination occurred easily under the action of gravity during standing, and completely delaminated at 10h. Comparative Example 6 did not perform stabilization on the carbon sequestration agent, and the stability of the carbon sequestration agent was poor, slightly delaminated at 1h, and completely delaminated at 5h. The carbon sequestration agent prepared by Example 1 had good stability and was not easy to delaminate, and slightly delaminated at 10h.

[0104] The above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application. The technical, shape and structure parts not described in detail in the present application are well-known technologies.

Claims

1. A method for improving carbon sequestration and sink of Cupressus funebris, characterized in that, The method comprises the following steps: (1) Cultivation management of carbon sink: pruning, weeding, fertilization, and pest control management of cupressus funebris to improve the growth of cupressus funebris; (2) Carbon sink agent spraying to increase carbon sink: spraying carbon sink agent on the managed cupressus funebris to improve photosynthetic efficiency; The carbon sink agent comprises the following raw materials: nanometer titanium dioxide, sunflower glycoside, L-menthol, casein, mannitol, palm oil, glycerol stearate, and curdlan; The raw material ratio of the carbon sink agent is as follows: the mass ratio of nanometer titanium dioxide, sunflower glycoside, L-menthol, casein, mannitol, palm oil, and curdlan is (1-1.5):(1.2-1.6):(0.8-1):(1-1.2):(0.7-0.8):(1.2-1.5):(4-5); The preparation method of the carbon sink agent is as follows: (1) casein is added to a 1wt% sodium chloride solution, mixed uniformly to obtain a casein solution, then mannitol and sunflower glycoside are added to the casein solution, and stirred uniformly to obtain solution A; (2) solution A is heated to 70-80℃, and the mixed oil of glycerol stearate and palm oil is slowly added to solution A, and stirred for 15-20min at the temperature, to obtain an emulsion; (3) curdlan, nanometer titanium dioxide, and L-menthol are added to the emulsion, stirred for 20-30min under the condition of a magnetic stirrer at 1000-1200rpm, then cooled to room temperature, to obtain the carbon sink agent; The mass ratio of the added amount of glycerol stearate to palm oil is 1:

20.

2. The method for improving carbon sequestration of Cupressus funebris according to claim 1, characterized in that, The cupressus funebris is more than 5 years old.

3. The method for improving carbon sequestration of Cupressus funebris according to claim 2, characterized in that, The use method of the carbon sink agent is as follows: the carbon sink agent is diluted 100 times with water to obtain a carbon sink agent diluent, and then uniformly sprayed on the surface of the needle leaves of cupressus funebris.

4. The method for improving carbon sequestration of Cupressus funebris according to claim 3, characterized in that, The carbon sink agent is sprayed once every other month.

5. The method for improving carbon sequestration of Cupressus funebris according to claim 4, characterized in that, The particle size of the nanometer titanium dioxide is 20-50nm.

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