Method for preparing water-soluble fertilizer containing humic acid and application of water-soluble fertilizer

Abstract

The invention provides a method for preparing a humic acid-containing water-soluble fertilizer and application thereof, and relates to the technical field of fertilizer preparation, the method comprises the following steps: (1) formulating a nitrogen phosphorus and potassium application amount simulation equation, (2) measuring and calculating the nitrogen phosphorus and potassium application amount, and (3) preparing a humic acid-containing water-soluble fertilizer product. According to the method, the application amount of nitrogen, phosphorus and potassium of crops is calculated according to the crown radius and the layer height of the crops, and the humic acid-containing water-soluble fertilizer is prepared from a sugarcane alcohol fermentation liquor concentrated solution and a water-soluble nitrogen, phosphorus and potassium chemical fertilizer. The humic acid-containing water-soluble fertilizer prepared by the method disclosed by the invention is reasonable in proportion of nitrogen, phosphorus and potassium, strong in operability in links such as calculation and preparation, and obvious in yield increasing effect proved by tests. The method provided by the invention is suitable for preparation and application of humic acid-containing water-soluble fertilizer, amino acid-containing water-soluble fertilizer and macroelement-containing water-soluble fertilizer on citrus.

Description

[Technical field]

[0001] The invention relates to the technical field of fertilizer preparation, and in particular to a method for preparing a water-soluble fertilizer containing humic acid and application thereof. [Background technology]

[0002] Guangxi's sugarcane sugar production accounts for about 70% of the country's total. The sugarcane industry is an important economic pillar of Guangxi. Molasses, a by-product of sugar production, is mainly used to produce alcohol. The alcohol fermentation liquid produced during the alcohol production process has long been the main source of pollution in Guangxi. Its harmless treatment is recognized as a difficult global problem that is difficult to solve, endangering the sustainable development of the sugar industry.

[0003] The existing disclosed treatment methods include applying sugarcane alcohol fermentation liquid to the preparation of farm fertilizers. The Chinese invention application with publication number CN118598704A discloses a humic acid water-soluble fertilizer specifically for citrus crops and a preparation method thereof. However, the method described in the scheme has the following problems: (1) The percentage and ratio of nitrogen, phosphorus and potassium are not clear, and may not be able to most efficiently meet the nitrogen, phosphorus and potassium application ratio requirements of citrus; (2) The invention does not specify the fertilizer application amount, and does not specify the relationship between the application amount and the age or growth of citrus trees; (3) The fertilizer formula of the invention is relatively fixed.

[0004] In fact, most of the publicly available fertilizers and fertilization methods are unable to formulate corresponding nutrients according to the changes in tree age. Instead, they generally increase or decrease fertilizers according to different growth cycles, without paying attention to the impact of the specific nutrient content in the fertilizer on plants. There is a defect that the nitrogen, phosphorus and potassium percentage of the fertilizer product cannot be matched with the nitrogen, phosphorus and potassium application amount and ratio of specific crops, and the application amount of the fertilizer product cannot be matched with the growth of the crop. [Summary of the invention]

[0005] In view of this, the purpose of the present invention is to provide a method for preparing a water-soluble fertilizer containing humic acid and its application. The water-soluble fertilizer containing humic acid obtained by the method can be applied to crops by root application methods such as drip irrigation, which has a significant yield-increasing effect.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A method for preparing a water-soluble fertilizer containing humic acid, the method comprising the following steps: (1) formulating a simulation equation for the application amount of nitrogen, phosphorus and potassium, (2) calculating the application amount of nitrogen, phosphorus and potassium, and (3) preparing a water-soluble fertilizer product containing humic acid;

[0008] The step (1) formulates the nitrogen, phosphorus and potassium application amount simulation equation as follows: formulate the pure N, P2O5 and K2O application amount simulation equations respectively, and the application amount unit is kg / mu;

[0009] Among them, Y1 is the pure N application rate simulation equation, Y1 = 11.41ln (r 2 h)+9.924;

[0010] Y2 is the simulation equation for the application amount of pure P2O5, Y2 = 6.52ln (r 2 h)+5.6708;

[0011] Y3 is the application amount simulation equation of pure K2O, Y3 = 9.78ln(r 2 h)+8.5062;

[0012] In the above equation, r is the average radius of the crown, and h is the crown height, both in meters.

[0013] The method of the invention is suitable for preparing and applying water-soluble fertilizers containing humic acid, water-soluble fertilizers containing amino acids and water-soluble fertilizers containing large amounts of elements to citrus.

[0014] In the present invention, further, the application amount simulation equation is applicable to the calculation of fertilizer amount from the age of trees 3 years or more to before the row is closed.

[0015] In the present invention, further, step (2) is to calculate the total application amount of nitrogen, phosphorus and potassium by measuring the average crown radius r and the crown height h of the mandarin orange tree, and then according to the application amount simulation equation of step (1).

[0016] In the present invention, further, the step (3) first determines the humic acid, nitrogen, phosphorus and potassium contents of the sugarcane alcohol fermentation liquid concentrate, and then calculates the addition ratio of the sugarcane alcohol fermentation liquid concentrate and the water-soluble fertilizer according to the ratio of the total application amount of nitrogen, phosphorus and potassium and the range of total nutrients ≥ 20% required by the NY 1106 standard, using the sugarcane alcohol fermentation liquid concentrate and the water-soluble fertilizer as raw materials, and finally prepares the water-soluble fertilizer containing humic acid.

[0017] In the present invention, further, the water-soluble fertilizer includes urea, potassium nitrate, ammonium dihydrogen phosphate, potassium dihydrogen phosphate, potassium sulfate and potassium chloride.

[0018] The present invention also provides the application of the above-mentioned water-soluble fertilizer containing humic acid, including application in fertilization of crops, wherein the water-fertilizer is specifically applied to crops by root application methods such as drip irrigation and sprinkling; the crops are mainly mandarin oranges.

[0019] The present invention also provides a method for fertilizing crops using the above fertilizer, characterized in that the method comprises the following steps:

[0020] 1) Dilution: dilute the water-soluble fertilizer containing humic acid by 100-500 times to obtain a working solution;

[0021] 2) Calculate the application amount: calculate the total application amount of the working solution, and further calculate the single application amount of the working solution;

[0022] 3) Application: Applying the working solution to the crops by root fertilization, wherein the crops are specifically mandarin oranges.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention include:

[0024] The present invention can flexibly adjust the nitrogen, phosphorus and potassium content of the humic acid water-soluble fertilizer containing sugarcane alcohol fermentation liquid according to the nitrogen, phosphorus and potassium application amount of different crops. The crop specifically targeted by the present application is the mandarin orange. According to the growth characteristics of the mandarin orange, that is, the demand for phosphorus is relatively low and the phosphorus nutrient in the soil is relatively rich, the nitrogen, phosphorus and potassium percentages in the applied fertilizer product are determined, and fine-tuned on the basis of the percentages of 9:5:8; the larger the crown radius and the crown layer height, the more autumn shoots grow, the higher the fruit yield, and the greater the fertilizer requirement. By investigating the relationship between the yield or fertilizer requirement of mandarin oranges of different ages and the crown radius and crown layer height, it is found that there is a natural logarithm change trend, and a simulation equation is formulated. According to the measured crown radius, layer height and equation of the mandarin orange, the nitrogen, phosphorus and potassium fertilizer requirements of mandarin oranges with different growth conditions can be calculated, thereby the total fertilizer application amount and single fertilizer application amount of the fertilizer product can be deduced. The present invention calculates and determines the application amount of the water-soluble fertilizer containing humic acid in the sugarcane alcohol fermentation liquid according to the crown radius and layer height of the mandarin orange, and changes the application amount of nitrogen, phosphorus and potassium fertilizers according to the growth of mandarin oranges of different ages. It can be dynamically adjusted in time and used immediately, thereby reducing the occurrence of water-soluble fertilizer precipitation, mildew and the like, and is also beneficial to improving fertilizer utilization and reducing fertilizer waste. [Specific implementation method]

[0025] The following embodiments may help those skilled in the art to more fully understand the present invention, but shall not limit the present invention in any way.

[0026] Example 1

[0027] This embodiment provides a method for preparing a water-soluble fertilizer containing humic acid, which specifically includes the following steps:

[0028] (1) Formulate simulation equations for nitrogen, phosphorus and potassium application rates: Formulate simulation equations for pure N, P2O5 and K2O application rates respectively, with the unit of application rate being kg / mu;

[0029] Among them, Y1 is the pure N application rate simulation equation, Y1 = 11.41ln (r 2 h)+9.924;

[0030] Y2 is the simulation equation for the application amount of pure P2O5, Y2 = 6.52ln (r 2 h)+5.6708;

[0031] Y3 is the application amount simulation equation of pure K2O, Y3 = 9.78ln(r 2 h)+8.5062;

[0032] In the above equation, r is the average radius of the tree crown, h is the height of the tree crown, and the units are all meters. The application rate simulation equation is applicable to the calculation of fertilizer application from trees 3 years old or older to before the closure of the row.

[0033] (2) Calculate the application amount of nitrogen, phosphorus and potassium: By measuring the average crown radius r and crown height h of the mandarin orange tree, the total application amount of nitrogen, phosphorus and potassium is calculated according to the application amount simulation equation in step (1).

[0034] (3) Preparation of water-soluble fertilizer containing humic acid: First, the humic acid, nitrogen, phosphorus and potassium contents of the sugarcane alcohol fermentation liquid concentrate are determined, and then, according to the ratio of the total application amount of nitrogen, phosphorus and potassium and the range of total nutrients ≥ 20% required by the NY 1106 standard, the sugarcane alcohol fermentation liquid concentrate and the water-soluble fertilizer are used as raw materials to calculate the addition ratio of the sugarcane alcohol fermentation liquid concentrate and the water-soluble fertilizer, and finally the water-soluble fertilizer containing humic acid is prepared. The water-soluble fertilizer is selected from urea, potassium nitrate, ammonium dihydrogen phosphate, potassium dihydrogen phosphate, potassium sulfate and potassium chloride.

[0035] Example 2

[0036] This embodiment specifies fertilizers and fertilization methods for a 6-year-old mandarin orange orchard with unclosed rows, specifically:

[0037] Formulate simulation equations for nitrogen, phosphorus and potassium application rates for Wogan, including:

[0038] Y1=11.41ln(r 2 h)+9.924:

[0039] Y2=6.52ln(r 2 h)+5.6708:

[0040] Y3=9.78ln(r 2 h)+8.5062:

[0041] In the above, Y1, Y2, and Y3 are the application rates of pure N, P2O5, and K2O, respectively (kg / mu), r is the average crown radius of Wogan (m), and h is the crown height (m);

[0042] Specifically, the average crown radius r and crown height h of the Wogan tree were measured to be 1.37m and 2.1m respectively. The total application amount of nitrogen, phosphorus and potassium was calculated to be 25.49, 14.57 and 21.85kg / mu respectively according to the equation. The humic acid, nitrogen, phosphorus and potassium contents of the concentrated sugarcane alcohol fermentation liquid were measured to be 13%, 9%, 1% and 2% respectively. According to the ratio of 25.49:14.57:21.85 and NY According to the total nutrient requirement of 1106 standard ≥20%, the contents of N, P2O5 and K2O of water-soluble fertilizer containing humic acid are determined to be 9.00%, 5.14% and 7.71% respectively. Sugarcane alcohol fermentation liquid concentrate (Baume degree is 59°BX) and water-soluble urea, ammonium dihydrogen phosphate and potassium sulfate are used as raw materials. The addition ratios of sugarcane alcohol fermentation liquid concentrate, urea, ammonium dihydrogen phosphate and potassium sulfate are calculated to be 788.98, 26.99, 70.47 and 113.56 kg respectively, and water-soluble fertilizer containing humic acid (in line with NY 1106 standard) is prepared; the working solution is obtained by diluting 200 times; the total application amount of the working solution is calculated to be 56644 kg / mu, and the working solution is applied 20 times from May to October, and the single application amount of the working solution is calculated to be 2832 kg / mu; the working solution of water-soluble fertilizer containing humic acid is applied by root drip irrigation.

[0043] Example 3

[0044] This embodiment specifies fertilizers and fertilization methods for a 9-year-old Wogan orchard with unclosed rows, specifically:

[0045] Formulate simulation equations for nitrogen, phosphorus and potassium application rates for Wogan, including:

[0046] Y1=11.41ln(r 2 h)+9.924;

[0047] Y2=6.52ln(r 2 h)+5.6708:

[0048] Y3=9.78ln(r 2 h)+8.5062;

[0049] In the above, Y1, Y2, and Y3 are the application rates of pure N, P2O5, and K2O, respectively (kg / mu), r is the average crown radius of Wogan (m), and h is the crown height (m);

[0050] Specifically, the average crown radius r and crown height h of the Wogan tree were measured to be 1.75m and 2.84m respectively. The total application amount of nitrogen, phosphorus and potassium was calculated to be 34.60, 19.77 and 29.66kg / mu respectively according to the equation. The humic acid, nitrogen, phosphorus and potassium contents of the concentrated sugarcane alcohol fermentation liquid were measured to be 12%, 9.2%, 0.5% and 2.5% respectively. According to the ratio of 34.60:19.77:29.66 and NY According to the total nutrient requirement of NY 1106 standard of ≥20%, the contents of N, P2O5 and K2O in water-soluble fertilizer containing humic acid are determined to be 9.00%, 5.14% and 7.72% respectively. Sugarcane alcohol fermentation liquid concentrate (Baume degree is 61°BX) and water-soluble potassium nitrate, diammonium phosphate and potassium sulfate are used as raw materials. The addition ratios of sugarcane alcohol fermentation liquid concentrate, potassium nitrate, diammonium phosphate and potassium sulfate are calculated to be 809.46, 60.42, 76.70 and 53.43 kg respectively, and water-soluble fertilizer containing humic acid (in compliance with NY 1106 standard) is prepared; the working solution is obtained by diluting 200 times; the total application amount of the working solution is calculated to be 76889 kg / mu, and the working solution is applied 20 times from May to October, and the single application amount of the working solution is calculated to be 3844 kg / mu; the working solution of water-soluble fertilizer containing humic acid is applied by root spraying.

[0051] Test example:

[0052] The applicant further tested the growth of the mandarin oranges described in the above Examples 2-3, and recorded the growth data as shown in Table 1:

[0053] Table 1 Growth of Wogan

[0054] Weight of single Wogan fruit (g / piece) Yield per mu (kg / mu) Example 2 150 2822 Example 3 145 3555

[0055] According to the data in Table 1, the method of the present application is to formulate equations first to calculate the nitrogen, phosphorus and potassium application amounts of the oranges, and then prepare and apply the fertilizers. The fertilizers are prepared and used immediately, which is beneficial to improving the utilization rate of the fertilizers. In addition, experiments have proved that the fertilizers prepared after calculation by this method can be applied to oranges, and good quality oranges can be obtained, with a single fruit weight of more than 140g and a high yield per mu. The method of the present application solves the defects in the existing patented technologies that the nitrogen, phosphorus and potassium percentages of fertilizer products cannot be matched with the nitrogen, phosphorus and potassium application amounts and ratios of specific crops, and the application amounts of fertilizer products cannot be matched with the growth of crops. It has a very positive significance.

[0056] Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements may be made thereto based on the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. A method for preparing a water-soluble fertilizer containing humic acid, characterized in that: The method comprises the following steps: (1) formulating a nitrogen, phosphorus and potassium application amount simulation equation, (2) calculating the nitrogen, phosphorus and potassium application amount, and (3) preparing a water-soluble fertilizer product containing humic acid; The step (1) formulates the nitrogen, phosphorus and potassium application amount simulation equation as follows: formulate the pure N, P2O5 and K2O application amount simulation equations respectively, and the application amount unit is kg / mu; Among them, Y1 is the pure N application rate simulation equation, Y1 = 11.41ln (r 2 h)+9.924; Y2 is the simulation equation for the application amount of pure P2O5, Y2 = 6.52ln (r 2 h)+5.6708; Y3 is the application amount simulation equation of pure K2O, Y3 = 9.78ln(r 2 h)+8.5062; In the above equation, r is the average radius of the crown, and h is the crown height, both in meters.

2. The method according to claim 1, characterized in that The application rate simulation equation is applicable to the calculation of fertilizer application amount from trees 3 years old or older to before row closure.

3. The method according to claim 1, characterized in that The step (2) is to measure the average crown radius r and the crown height h of the mandarin orange tree, and then calculate the total application amount of nitrogen, phosphorus and potassium according to the application amount simulation equation of step (1).

4. The method according to claim 1, characterized in that: The step (3) first determines the humic acid, nitrogen, phosphorus and potassium contents of the sugarcane alcohol fermentation liquid concentrate, and then calculates the addition ratio of the sugarcane alcohol fermentation liquid concentrate and the water-soluble fertilizer based on the ratio of the total application amount of nitrogen, phosphorus and potassium and the range of total nutrients ≥ 20% required by the NY 1106 standard, using the sugarcane alcohol fermentation liquid concentrate and the water-soluble fertilizer as raw materials, and finally prepares the water-soluble fertilizer containing humic acid.

5. The method according to claim 4, characterized in that The water-soluble fertilizers include urea, potassium nitrate, ammonium dihydrogen phosphate, potassium dihydrogen phosphate, potassium sulfate and potassium chloride.

6. An application of a water-soluble fertilizer containing humic acid prepared according to the method according to any one of claims 1 to 5, characterized in that: The fertilizer is used for fertilizing crops.

7. The use according to claim 6, characterized in that: The crop is mandarin orange.

8. A method for fertilizing crops using the fertilizer prepared by the method according to any one of claims 1 to 5, characterized in that: The method comprises the following steps: 1) Dilution: dilute the water-soluble fertilizer containing humic acid by 100-500 times to obtain a working solution; 2) Calculate the application amount: calculate the total application amount of the working solution, and further calculate the single application amount of the working solution; 3) Application: Apply the working solution to the crops by root fertilization.

9. The method according to claim 8, characterized in that The crop is mandarin orange.