Biochar fertilizer for fresh plums and preparation method of biochar fertilizer

Abstract

The invention discloses a biochar fertilizer for new plums and a preparation method thereof, and belongs to the technical field of fertilizers, the biochar fertilizer is prepared from the following components in parts by mass: 60 parts of biochar, 15 parts of urea, 5 parts of quick lime, 2 parts of methyl cinnamate, 17 parts of sodium selenite, 8 parts of monopotassium phosphate, 10-12 parts of pyroligneous liquor, 18 parts of potassium chloride, 2 parts of bone meal, 2-4 parts of magnesium sulfate, 20 parts of dried cow dung and 20 parts of water; a preparation method of the modified biochar comprises the following steps: forming a mixed raw material from mixed straws, zinc sulfate, ferrous sulfate and manganese sulfate according to a mass ratio of 80: 1: (2-3): 2, drying the mixed raw material at 80 DEG C for 24 hours, then crushing the mixed raw material to be less than 3 mm, performing pyrolysis in a carbonization furnace at 400-500 DEG C for 1.5 hours, and then cooling in the carbonization furnace to room temperature to obtain the modified biochar. The biochar fertilizer has the effects of delaying premature senility of new plum trees and improving the water retention capacity of soil.

Description

Technical Field

[0001] The invention belongs to the technical field of biochar fertilizers and relates to a biochar fertilizer for new plums and a preparation method thereof. Background Art

[0002] New plum, also known as sour plum, is a sour plum. In the cultivation of new plum, it is crucial to further improve the quality and yield of new plum, prevent the premature aging of new plum trees, and promptly improve the water retention capacity of the soil in some water-scarce and saline-alkali areas. Only in this way can we achieve sustainable development of agriculture and protection of the ecological environment.

[0003] Based on the above research, it is necessary to provide a biochar fertilizer for new plum. Summary of the Invention

[0004] The object of the present invention is to provide a biochar fertilizer for new plum and a preparation method thereof, in order to provide a method for preventing premature aging of new plum fruit trees and timely improving the water retention capacity of the soil in some water-deficient and saline-alkali areas. Existing biochar fertilizers often only focus on the cultivation method of new plum fruit trees, or focus on the acid-base neutralization of the land in saline-alkali areas, but do not pay attention to prolonging the premature aging of fruit trees, increasing yields, and taking into account water retention performance in specific areas, which can reduce water consumption. This application optimizes the biochar fertilizer formula and improves the preparation method of the biochar fertilizer, so that the prepared biochar fertilizer has a better effect of delaying the premature aging period and improving the water retention capacity of the land, has extremely high economic benefits, and the matching of the formula is suitable for promotion and use in saline-alkali areas.

[0005] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0006] 60 parts of modified biochar, 15 parts of urea, 5 parts of quicklime, 2 parts of methyl cinnamate, 17 parts of sodium selenite, 8 parts of potassium dihydrogen phosphate, 10-12 parts of wood vinegar, 18 parts of potassium chloride, 2 parts of bone meal, 2-4 parts of magnesium sulfate, 20 parts of dried cow dung, and 20 parts of water;

[0007] The modified biochar preparation method comprises: forming a mixed raw material by mixing straw, zinc sulfate, ferrous sulfate and manganese sulfate in a mass ratio of 80:1:(2-3):2, drying the mixed raw material at 80° C. for 24 hours, crushing the mixed raw material to less than 3 mm, pyrolyzing the mixed raw material at 400° C.-500° C. for 1.5 hours in a carbonization furnace, and then cooling the mixed raw material to room temperature in the carbonization furnace to obtain the modified biochar;

[0008] The magnesium sulfate added later in the present application significantly improves water retention from 14% to 19%, and delays the decline period from 10 days to 20 days, allowing the metal elements to be released in a gradient distribution in the biochar fertilizer. Combined with wood vinegar, the prepared biochar fertilizer, when applied to land and fruit trees, has a better effect of delaying the early aging period and improving the water retention capacity of the land, thus having extremely high economic benefits. Moreover, the combined optimization of the formula wood vinegar can also be adapted for promotion and use in saline-alkali areas.

[0009] The mass ratio of the modified biochar to the magnesium sulfate is 60:(2-3);

[0010] Preferably, the mass ratio of the modified biochar to the magnesium sulfate is 60:2.

[0011] Preferably, the mass ratio of straw, zinc sulfate, ferrous sulfate and manganese sulfate is 80:1:2:2.

[0012] Preferably, the mass ratio of modified biochar to wood vinegar is 60:10.

[0013] Preferably, the mass ratio of modified biochar to wood vinegar is 60:11.

[0014] A method for preparing biochar fertilizer for Xinmei comprises the following steps:

[0015] S1: Weigh 60 parts of modified biochar, 15 parts of urea, 5 parts of quicklime, and 20 parts of water according to their mass components, and then stir and mix them;

[0016] S2: heating and boiling the mixed materials in step S1 for 30 minutes, cooling to room temperature, and then adding 20 parts of dry cow dung, and pre-crushing the dry cow dung;

[0017] S3: Add 2 parts of methyl cinnamate, 17 parts of sodium selenite, 8 parts of potassium dihydrogen phosphate, 18 parts of potassium chloride, 2 parts of bone meal, 2-4 parts of magnesium sulfate, and 10 parts of wood vinegar into the liquid of step S2, stir thoroughly at room temperature for 2 hours, and then dry naturally in the sun to obtain biochar fertilizer.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention optimizes the formula of biochar fertilizer and improves the preparation method of biochar fertilizer. The modified biochar is prepared, wherein relevant metal elements are matched with zinc sulfate, ferrous sulfate and manganese sulfate compounds in the preparation of straw, so that the corresponding elements can be durably combined during the later use of the biochar. Then, the formula of the mass components and the magnesium sulfate added later can make the metal elements be released in a gradient in the distribution of the biochar fertilizer. Therefore, when the prepared biochar fertilizer acts on land and fruit trees, it has the advantages of better delaying the early aging period and improving the water retention capacity of the land, and has extremely high economic benefits. Moreover, the appropriate mass ratio of the modified biochar and wood vinegar is combined and optimized to match and adapt to the promotion and use in saline-alkali areas, while taking into account both water retention performance and delayed early aging period. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below by way of specific embodiments. It should be understood by those skilled in the art that the embodiments are merely to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0021] 60 parts of modified biochar, 15 parts of urea, 5 parts of quicklime, 2 parts of methyl cinnamate, 17 parts of sodium selenite, 8 parts of potassium dihydrogen phosphate, 10-12 parts of wood vinegar, 18 parts of potassium chloride, 2 parts of bone meal, 2-4 parts of magnesium sulfate, 20 parts of dried cow dung, and 20 parts of water;

[0022] The modified biochar preparation method comprises: forming a mixed raw material by mixing straw, zinc sulfate, ferrous sulfate and manganese sulfate in a mass ratio of 80:1:(2-3):2, drying the mixed raw material at 80° C. for 24 hours, crushing the mixed raw material to less than 3 mm, pyrolyzing the mixed raw material at 400° C.-500° C. for 1.5 hours in a carbonization furnace, and then cooling the mixed raw material to room temperature in the carbonization furnace to obtain the modified biochar;

[0023] The mass ratio of the modified biochar to the magnesium sulfate is 60:(2-3);

[0024] Preferably, the mass ratio of the modified biochar to the magnesium sulfate is 60:2.

[0025] Preferably, the mass ratio of straw, zinc sulfate, ferrous sulfate and manganese sulfate is 80:1:2:2.

[0026] Preferably, the mass ratio of modified biochar to wood vinegar is 60:10.

[0027] Preferably, the mass ratio of modified biochar to wood vinegar is 60:11.

[0028] A method for preparing biochar fertilizer for Xinmei comprises the following steps:

[0029] S1: Weigh 60 parts of modified biochar, 15 parts of urea, 5 parts of quicklime, and 20 parts of water according to their mass components, and then stir and mix them;

[0030] S2: heating and boiling the mixed materials in step S1 for 30 minutes, cooling to room temperature, and then adding 20 parts of dry cow dung, and pre-crushing the dry cow dung;

[0031] S3: Add 2 parts of methyl cinnamate, 17 parts of sodium selenite, 8 parts of potassium dihydrogen phosphate, 18 parts of potassium chloride, 2 parts of bone meal, 2-4 parts of magnesium sulfate, and 10-12 parts of wood vinegar into the liquid of step S2, stir thoroughly at room temperature for 2 hours, and then dry naturally in the sun to obtain biochar fertilizer.

[0032] Cultivation method of new plum: choose a suitable slope that is sheltered from the wind and facing the sun, and turn the soil to a depth of 40cm. Then, dig a tree hole with a diameter of 80cm and a depth of 60cm 1-2 months before planting. Apply 0.5kg of this application's biochar fertilizer as base fertilizer to each hole, and turn the biochar fertilizer into the soil and keep it in a 10cm soil layer. Choose grafted seedlings of excellent large-fruit varieties, water them enough to take root, keep the soil moist, and carry out fertilization management in autumn every year, applying 0.3kg, and then continue to pay attention, prune, add water, etc.

[0033] Example 1:

[0034] A method for preparing biochar fertilizer for Xinmei comprises the following steps:

[0035] S1: Weigh 60 parts of modified biochar, 15 parts of urea, 5 parts of quicklime, and 20 parts of water according to their mass components, and then stir and mix them;

[0036] S2: heating and boiling the mixed materials in step S1 for 30 minutes, cooling to room temperature, and then adding 20 parts of dry cow dung, and pre-crushing the dry cow dung;

[0037] S3: Add 2 parts of methyl cinnamate, 17 parts of sodium selenite, 8 parts of potassium dihydrogen phosphate, 18 parts of potassium chloride, 2 parts of bone meal, 2 parts of magnesium sulfate, and 10 parts of wood vinegar into the liquid of step S2, stir thoroughly at room temperature for 2 hours, and then dry naturally in the sun to obtain biochar fertilizer.

[0038] The modified biochar preparation method comprises: forming a mixed raw material by mixing straw, zinc sulfate, ferrous sulfate and manganese sulfate in a mass ratio of 80:1:2:2, drying the mixed raw material at 80° C. for 24 hours, crushing the mixed raw material to less than 3 mm, pyrolyzing the mixed raw material at 400° C. for 1.5 hours in a carbonization furnace, and then cooling the mixed raw material to room temperature in the carbonization furnace to obtain the modified biochar;

[0039] Cultivation method of new plum: choose a suitable slope that is sheltered from the wind and facing the sun, and turn the soil to a depth of 40cm. Then, dig a tree hole with a diameter of 80cm and a depth of 60cm 1-2 months before planting. Apply 0.5kg of this application's biochar fertilizer as base fertilizer to each hole, and turn the biochar fertilizer into the soil and keep it in a 10cm soil layer. Choose grafted seedlings of excellent large-fruit varieties, water them enough to take root, keep the soil moist, and carry out fertilization management in autumn every year, applying 0.3kg, and then continue to pay attention, prune, add water, etc.

[0040] Example 2:

[0041] A method for preparing biochar fertilizer for Xinmei comprises the following steps:

[0042] S1: Weigh 60 parts of modified biochar, 15 parts of urea, 5 parts of quicklime, and 20 parts of water according to their mass components, and then stir and mix them;

[0043] S2: heating and boiling the mixed materials in step S1 for 30 minutes, cooling to room temperature, and then adding 20 parts of dry cow dung, and pre-crushing the dry cow dung;

[0044] S3: Add 2 parts of methyl cinnamate, 17 parts of sodium selenite, 8 parts of potassium dihydrogen phosphate, 18 parts of potassium chloride, 2 parts of bone meal, 2 parts of magnesium sulfate, and 11 parts of wood vinegar into the liquid of step S2, stir thoroughly at room temperature for 2 hours, and then dry naturally in the sun to obtain biochar fertilizer.

[0045] The modified biochar preparation method comprises: forming a mixed raw material by mixing straw, zinc sulfate, ferrous sulfate and manganese sulfate in a mass ratio of 80:1:2:2, drying the mixed raw material at 80° C. for 24 hours, crushing the mixed raw material to less than 3 mm, pyrolyzing the mixed raw material at 400° C. for 1.5 hours in a carbonization furnace, and then cooling the mixed raw material to room temperature in the carbonization furnace to obtain the modified biochar;

[0046] Cultivation method of new plum: choose a suitable slope that is sheltered from the wind and facing the sun, and turn the soil to a depth of 40cm. Then, dig a tree hole with a diameter of 80cm and a depth of 60cm 1-2 months before planting. Apply 0.5kg of this application's biochar fertilizer as base fertilizer to each hole, and turn the biochar fertilizer into the soil and keep it in a 10cm soil layer. Choose grafted seedlings of excellent large-fruit varieties, water them enough to take root, keep the soil moist, and carry out fertilization management in autumn every year, applying 0.3kg, and then continue to pay attention, prune, add water, etc.

[0047] Example 3:

[0048] A method for preparing biochar fertilizer for Xinmei comprises the following steps:

[0049] S1: Weigh 60 parts of modified biochar, 15 parts of urea, 5 parts of quicklime, and 20 parts of water according to their mass components, and then stir and mix them;

[0050] S2: heating and boiling the mixed materials in step S1 for 30 minutes, cooling to room temperature, and then adding 20 parts of dry cow dung, and pre-crushing the dry cow dung;

[0051] S3: Add 2 parts of methyl cinnamate, 17 parts of sodium selenite, 8 parts of potassium dihydrogen phosphate, 18 parts of potassium chloride, 2 parts of bone meal, 2 parts of magnesium sulfate, and 12 parts of wood vinegar into the liquid of step S2, stir thoroughly at room temperature for 2 hours, and then dry naturally in the sun to obtain biochar fertilizer.

[0052] The modified biochar preparation method comprises: forming a mixed raw material by mixing straw, zinc sulfate, ferrous sulfate and manganese sulfate in a mass ratio of 80:1:2:2, drying the mixed raw material at 80° C. for 24 hours, crushing the mixed raw material to less than 3 mm, pyrolyzing the mixed raw material at 400° C. for 1.5 hours in a carbonization furnace, and then cooling the mixed raw material to room temperature in the carbonization furnace to obtain the modified biochar;

[0053] Cultivation method of new plum: choose a suitable slope that is sheltered from the wind and facing the sun, and turn the soil to a depth of 40cm. Then, dig a tree hole with a diameter of 80cm and a depth of 60cm 1-2 months before planting. Apply 0.5kg of this application's biochar fertilizer as base fertilizer to each hole, and turn the biochar fertilizer into the soil and keep it in a 10cm soil layer. Choose grafted seedlings of excellent large-fruit varieties, water them enough to take root, keep the soil moist, and carry out fertilization management in autumn every year, applying 0.3kg, and then continue to pay attention, prune, add water, etc.

[0054] Comparative Example 1:

[0055] A method for preparing biochar fertilizer for Xinmei comprises the following steps:

[0056] S1: Weigh 60 parts of modified biochar, 15 parts of urea, 5 parts of quicklime, and 20 parts of water according to their mass components, and then stir and mix them;

[0057] S2: heating and boiling the mixed materials in step S1 for 30 minutes, cooling to room temperature, and then adding 20 parts of dry cow dung, and pre-crushing the dry cow dung;

[0058] S3: Add 2 parts of methyl cinnamate, 17 parts of sodium selenite, 8 parts of potassium dihydrogen phosphate, 18 parts of potassium chloride, 2 parts of bone meal, 2 parts of magnesium sulfate, and 9 parts of wood vinegar into the liquid of step S2, stir thoroughly at room temperature for 2 hours, and then dry naturally in the sun to obtain biochar fertilizer.

[0059] The modified biochar preparation method comprises: forming a mixed raw material by mixing straw, zinc sulfate, ferrous sulfate and manganese sulfate in a mass ratio of 80:1:2:2, drying the mixed raw material at 80° C. for 24 hours, crushing the mixed raw material to less than 3 mm, pyrolyzing the mixed raw material at 400° C. for 1.5 hours in a carbonization furnace, and then cooling the mixed raw material to room temperature in the carbonization furnace to obtain the modified biochar;

[0060] Cultivation method of new plum: choose a suitable slope that is sheltered from the wind and facing the sun, and turn the soil to a depth of 40cm. Then, dig a tree hole with a diameter of 80cm and a depth of 60cm 1-2 months before planting. Apply 0.5kg of this application's biochar fertilizer as base fertilizer to each hole, and turn the biochar fertilizer into the soil and keep it in a 10cm soil layer. Choose grafted seedlings of excellent large-fruit varieties, water them enough to take root, keep the soil moist, and carry out fertilization management in autumn every year, applying 0.3kg, and then continue to pay attention, prune, add water, etc.

[0061] Comparative Example 2:

[0062] A method for preparing biochar fertilizer for Xinmei comprises the following steps:

[0063] S1: Weigh 60 parts of modified biochar, 15 parts of urea, 5 parts of quicklime, and 20 parts of water according to their mass components, and then stir and mix them;

[0064] S2: heating and boiling the mixed materials in step S1 for 30 minutes, cooling to room temperature, and then adding 20 parts of dry cow dung, and pre-crushing the dry cow dung;

[0065] S3: Add 2 parts of methyl cinnamate, 17 parts of sodium selenite, 8 parts of potassium dihydrogen phosphate, 18 parts of potassium chloride, 2 parts of bone meal, 2 parts of magnesium sulfate, and 13 parts of wood vinegar into the liquid in step S2, stir thoroughly at room temperature for 2 hours, and then dry naturally in the sun to obtain biochar fertilizer.

[0066] The modified biochar preparation method comprises: forming a mixed raw material by mixing straw, zinc sulfate, ferrous sulfate and manganese sulfate in a mass ratio of 80:1:2:2, drying the mixed raw material at 80° C. for 24 hours, crushing the mixed raw material to less than 3 mm, pyrolyzing the mixed raw material at 400° C. for 1.5 hours in a carbonization furnace, and then cooling the mixed raw material to room temperature in the carbonization furnace to obtain the modified biochar;

[0067] Cultivation method of new plum: choose a suitable slope that is sheltered from the wind and facing the sun, and turn the soil to a depth of 40cm. Then, dig a tree hole with a diameter of 80cm and a depth of 60cm 1-2 months before planting. Apply 0.5kg of this application's biochar fertilizer as base fertilizer to each hole, and turn the biochar fertilizer into the soil and keep it in a 10cm soil layer. Choose grafted seedlings of excellent large-fruit varieties, water them enough to take root, keep the soil moist, and carry out fertilization management in autumn every year, applying 0.3kg, and then continue to pay attention, prune, add water, etc.

[0068] Comparative Example 3:

[0069] A method for preparing biochar fertilizer for Xinmei comprises the following steps:

[0070] S1: Weigh 60 parts of modified biochar, 15 parts of urea, 5 parts of quicklime, and 20 parts of water according to their mass components, and then stir and mix them;

[0071] S2: heating and boiling the mixed materials in step S1 for 30 minutes, cooling to room temperature, and then adding 20 parts of dry cow dung, and pre-crushing the dry cow dung;

[0072] S3: Add 2 parts of methyl cinnamate, 17 parts of sodium selenite, 8 parts of potassium dihydrogen phosphate, 18 parts of potassium chloride, 2 parts of bone meal, and 10 parts of wood vinegar into the liquid of step S2, stir thoroughly at room temperature for 2 hours, and then dry naturally in the sun to obtain biochar fertilizer.

[0073] The modified biochar preparation method comprises: forming a mixed raw material by mixing straw, zinc sulfate, ferrous sulfate, manganese sulfate and magnesium sulfate in a mass ratio of 80:1:2:2:2, drying the mixed raw material at 80°C for 24 hours, crushing the mixed raw material to less than 3 mm, pyrolyzing the mixed raw material at 400°C for 1.5 hours in a carbonization furnace, and then cooling the mixed raw material to room temperature in the carbonization furnace to obtain the modified biochar;

[0074] Cultivation method of new plum: choose a suitable slope that is sheltered from the wind and facing the sun, and turn the soil to a depth of 40cm. Then, dig a tree hole with a diameter of 80cm and a depth of 60cm 1-2 months before planting. Apply 0.5kg of this application's biochar fertilizer as base fertilizer to each hole, and turn the biochar fertilizer into the soil and keep it in a 10cm soil layer. Choose grafted seedlings of excellent large-fruit varieties, water them enough to take root, keep the soil moist, and carry out fertilization management in autumn every year, applying 0.3kg, and then continue to pay attention, prune, add water, etc.

[0075] Test method:

[0076] Water retention test: The fertilizers described in the examples and comparative examples were applied to the soil of five adjacent saline-alkali plots of substantially identical properties. One month later, under the same irrigation conditions, the soil moisture content was measured every 15 days for a period of one month (thus, there were two tests in total: the first test, which lasted just 15 days, and the second test, which lasted 30 days, for a total of one month). When measuring soil moisture content, 15 sampling points were taken on each saline-alkali plot, and the average value was calculated. The sampling points were located 0.1 m below the soil surface. Soil moisture was measured using TDR (Time Domain Reflectometry).

[0077] Premature aging test: Comparison of the same variety of plums cultivated with fertilizers in the embodiment and the comparative example, and cultivation without fertilizer (i.e., only the fertilizer of the present application is not added, and other cultivation techniques are the same). The comparison is for the delayed decline period after cultivation using the embodiment and the comparative example.

[0078] Table 1: Effects of modified biochar and wood vinegar on the performance of biochar fertilizer:

[0079]

[0080]

[0081] As shown in Table 1, the effects of modified biochar mass parts and wood vinegar mass parts on the performance of biochar fertilizers, through the preparation of modified biochar, by comparing Examples 1-3 and Comparative Examples 1 and 2, we found that the combined formula of the biochar fertilizer of the present application, by comparing Comparative Examples 1 and 2 with the biochar fertilizer not added, premature aging was delayed by 10 days and 12 days, and then by comparing Examples 1-3 and Comparative Examples 1-2, it can be known that when controlling 60 parts of modified biochar and 10-12 parts of wood vinegar, the relevant metal elements in the modified biochar are matched with zinc sulfate, ferrous sulfate and manganese sulfate compounds in the preparation of straw, so that the corresponding elements can be obtained by In the later use of biochar, it can be permanently combined, and then combined with the formula of mass components, and the magnesium sulfate added later. Compared with the magnesium sulfate added in advance to the modified biochar in Comparative Example 3 and Example 1, the magnesium sulfate added later in the present application significantly improves the water retention from 14% to 19%, and the decline period is postponed from 10 days to 20 days, which can make the metal elements release gradiently in the distribution of biochar fertilizer. Then, it is combined with wood vinegar, so that when the prepared biochar fertilizer acts on land and fruit trees, it has a better delay in the early aging period and improves the water retention capacity of the land, with extremely high economic benefits, and the combination optimization of the formula wood vinegar can also match and adapt to the promotion and use in saline-alkali areas.

[0082] Based on Example 1, Examples 4 and 5 only changed the mass ratio of straw, zinc sulfate, ferrous sulfate and manganese sulfate, and other conditions were the same.

[0083] Table 2: Comparison of the effects of modified biochar raw material components on water retention performance:

[0084]

[0085] By comparing Example 4, Example 5 and Example 1, we found that when the mass ratio of straw, zinc sulfate, ferrous sulfate and manganese sulfate is 80:1:3:2, the water retention performance can be better improved. This may be because the appropriate ratio of straw, zinc sulfate, ferrous sulfate and manganese sulfate can improve the absorption of water by the modified biochar and retain moisture, thereby improving the water retention performance.

[0086] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention fall within the protection scope and disclosure scope of the present invention.

Claims

1. A biochar fertilizer for new plum, characterized in that, According to mass fraction, 60 parts of modified biochar, 15 parts of urea, 5 parts of quicklime, 2 parts of methyl cinnamate, 17 parts of sodium selenite, 8 parts of potassium dihydrogen phosphate, 10-12 parts of wood vinegar, 18 parts of potassium chloride, 2 parts of bone meal, 2-4 parts of magnesium sulfate, 20 parts of dried cow dung, and 20 parts of water; The modified biochar preparation method comprises the following steps: forming a mixed raw material by mixing straw, zinc sulfate, ferrous sulfate and manganese sulfate in a mass ratio of 80:1:(2-3):2, drying the mixed raw material at 80°C for 24 hours, crushing the mixed raw material to less than 3 mm, pyrolyzing the mixed raw material at 400°C-500°C in a carbonization furnace for 1.5 hours, and then cooling the mixed raw material to room temperature in the carbonization furnace to obtain the modified biochar.

2. The biochar fertilizer for new plums according to claim 1, characterized in that: The mass ratio of the modified biochar to the magnesium sulfate is 60:(2-3).

3. The biochar fertilizer for new plums according to claim 1, characterized in that: The mass ratio of the modified biochar to the magnesium sulfate is 60:

2.

4. The biochar fertilizer for new plums according to claim 1, characterized in that: The mass ratio of the straw, zinc sulfate, ferrous sulfate and manganese sulfate is 80:1:2:

2.

5. The biochar fertilizer for new plums according to claim 1, characterized in that: The mass ratio of the modified biochar to the wood vinegar is 60:

10.

6. The biochar fertilizer for new plums according to claim 1, characterized in that: The mass ratio of the modified biochar to the wood vinegar is 60:

11.

7. The method for preparing biochar fertilizer for new plum according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Weigh 60 parts of modified biochar, 15 parts of urea, 5 parts of quicklime, and 20 parts of water according to their mass components, and then stir and mix them; S2: heating and boiling the mixed materials in step S1 for 30 minutes, cooling to room temperature, and then adding 20 parts of dry cow dung, and pre-crushing the dry cow dung; S3: Add 2 parts of methyl cinnamate, 17 parts of sodium selenite, 8 parts of potassium dihydrogen phosphate, 18 parts of potassium chloride, 2 parts of bone meal, 2-4 parts of magnesium sulfate, and 10-12 parts of wood vinegar into the liquid of step S2, stir thoroughly at room temperature for 2 hours, and then dry naturally in the sun to obtain biochar fertilizer.

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