Special liquid organic chelated foliage compound fertilizer for brassica rapa and application of special liquid organic chelated foliage compound fertilizer

Abstract

The invention relates to a special liquid organic chelating foliage compound fertilizer for brassica rapa and application of the special liquid organic chelating foliage compound fertilizer. The effective components of the special liquid organic chelating foliage compound fertilizer for brassica rapa comprise sorbitol, nitrogen, phosphorus, potassium and medium trace elements, the sorbitol reacts with mineral elements to form a chelate, absorption of brassica rapa to nutrient elements is promoted, the yield of brassica rapa per unit area is effectively increased, and the quality of brassica rapa is improved. The preparation method is simple, the cost is low, the production process is simple, the mineral element content is rich, and a rich nutrient source is provided for high-quality growth of the brassica rapa.

Description

Technical Field

[0001] The invention belongs to the field of fertilizer production and application, and specifically relates to a liquid organic chelated foliar fertilizer specially used for Shanghai green and an application thereof. Background Art

[0002] Shanghai green is a herbaceous plant of the genus Brassica in the cruciferous family, also known as "small cabbage". It is one of the local specialty vegetables in the Yellow River and Huaihe River basins and has high nutritional value. Every 100g of fresh Shanghai green contains 2.3g of carbohydrates, 0.6g of crude fiber, 1.3g of protein, 1.49mg of carotene, 0.03mg of vitamin B1, 0.08mg of vitamin B2, 40mg of vitamin C, 56mg of calcium, 32mg of phosphorus, and 1.2mg of iron. It is one of the most popular leafy vegetables. However, in order to pursue high yields of Shanghai green and obtain more benefits, people often apply excessive amounts of nitrogen, phosphorus, and potassium macronutrient inorganic fertilizers to the soil. Long-term application can cause soil compaction, secondary salinization, and insufficient supply of trace elements, resulting in low yields and poor quality of Shanghai green, and also reducing the stress resistance of Shanghai green.

[0003] The growth cycle of Shanghai green is short, generally within 50 days, and its demand for nutrients varies greatly. At the same time, Shanghai green is a crop that requires more boron. The supply of boron in the early growth period directly affects the yield and quality of Shanghai green. Therefore, the scientific ratio of macroelements and trace elements, in line with the law of nutrient absorption by Shanghai green, is an important way to achieve weight loss and efficiency, increase crop yield and improve quality, so various Shanghai green special fertilizers came into being.

[0004] Patent document CN110105133A discloses a special stress-resistant foliar fertilizer for Shanghai green and a method of using the same. The raw materials include, by weight: 0.5-2.0 parts of chitosan oligosaccharide, 2-5 parts of urea, 2-5 parts of potassium chloride, 3-7 parts of ammonium nitrate, 0.5-3 parts of sodium carbonate, 0.05-0.2 parts of salicylic acid, and 0.2-1.2 parts of polyglucan. Although it can promote the growth of Shanghai green and improve its stress resistance, the raw materials lack boron, which is in high demand for Shanghai green, which will lead to poor transportation of photosynthetic products in the leaves, resulting in thickening of the leaf body and a poor taste. Patent document CN 112142513 B discloses a chelated foliar fertilizer for vegetables, a preparation method and an application thereof. The main components of the foliar fertilizer are nano-chitosan and polypeptide chelated metal salt solution. The prepared foliar fertilizer has a high content of trace elements and can effectively supplement the trace elements required by Shanghai green and prevent the occurrence of nutrient deficiency. However, the chelation time is too long (4-7h), consuming a large amount of energy, and strong acids and alkalis such as concentrated sulfuric acid and sodium hydroxide need to be added during the preparation process, which has high requirements on equipment and is not conducive to practical application.

[0005] Therefore, it is necessary to develop an organic chelated foliar fertilizer specifically for Shanghai green that has a simple production process, low energy consumption, short chelation time, high fertilizer utilization rate and can improve yield and quality. Summary of the invention

[0006] In view of the problems that the existing organic chelated foliar fertilizer has complex production process and high production cost, and effective nutrients are easily lost and fertilizer utilization rate is low during the cultivation process of Shanghai green, which affects the yield and quality of Shanghai green, the present invention provides a liquid organic chelated foliar fertilizer special for Shanghai green and its application.

[0007] The effective ingredients of the liquid organic chelated foliar fertilizer for Shanghai green include sorbitol, nitrogen, phosphorus, potassium and trace elements. Sorbitol reacts with mineral elements to form chelates, which promotes the absorption of nutrients by Shanghai green, thereby effectively increasing the yield per unit area of ​​Shanghai green and improving its quality.

[0008] To achieve the above object, the present invention is implemented through the following technical solutions:

[0009] A liquid organic chelated foliar fertilizer for Shanghai green, comprising nitrogen, phosphorus, potassium and boron chelated fertilizer and calcium and magnesium chelated fertilizer.

[0010] The nitrogen, phosphorus, potassium and boron chelate fertilizer comprises the following raw materials by weight: 97 parts of deionized water, 29 parts of sorbitol liquid with a mass concentration of 70%, 8-50 parts of urea, 15 parts of potassium dihydrogen phosphate and 3 parts of boric acid;

[0011] The calcium-magnesium chelate fertilizer comprises the following raw materials in weight: 39 parts of deionized water, 109 parts of sorbitol liquid with a mass concentration of 70%, 50 parts of calcium nitrate and 55 parts of magnesium nitrate.

[0012] The preparation method of the liquid organic chelated foliar fertilizer for Shanghai Qing comprises the following steps:

[0013] (1) Preparation of nitrogen, phosphorus, potassium and boron chelate fertilizer:

[0014] 1) Dissolving sorbitol liquid in deionized water according to the ratio, heating in a constant temperature water bath in an electromagnetic stirring reactor, controlling the material temperature in the reactor at 65° C., setting the stirring speed at 120 r / min, stirring until the mixed liquid is uniform, and obtaining a sorbitol aqueous solution;

[0015] 2) adding 8-50 parts of urea, 15 parts of potassium dihydrogen phosphate, and 3 parts of boric acid to the sorbitol aqueous solution in sequence, and after the components are fully mixed, a mixed solution is obtained;

[0016] 3) Chelating reaction: keep heating in a constant temperature water bath at 65°C, continuously stir the mixed solution at a speed of 120r / min, react for 30min, take out and let stand, cool at room temperature, and obtain nitrogen, phosphorus, potassium and boron chelate fertilizer;

[0017] (2) Preparation of calcium-magnesium chelated fertilizer:

[0018] a. Dissolve sorbitol liquid in deionized water according to the ratio, heat in a constant temperature water bath in an electromagnetic stirring reactor, control the material temperature in the reactor at 65°C, set the stirring speed to 120r / min, and stir until the mixed liquid is uniform to obtain a sorbitol aqueous solution;

[0019] b. Add 50 parts of calcium nitrate and 55 parts of magnesium nitrate to the sorbitol aqueous solution in sequence, and after the components are fully mixed, a mixed solution is obtained;

[0020] c. Chelating reaction: Keep the water bath heated at 65°C, stir the mixed solution at 120r / min, react for 30min, take out and let stand, cool at room temperature to obtain calcium-magnesium chelated fertilizer.

[0021] The specific application method of the above Shanghai Qing special liquid organic chelated foliar fertilizer is as follows:

[0022] (1) Spraying is performed according to the growth law of Shanghai green rapeseed. The first spraying is performed 15 days after rapeseed is planted. When spraying, nitrogen, phosphorus, potassium, boron chelate fertilizer and calcium, magnesium chelate fertilizer are diluted and used alone or in combination. The dilution multiple of nitrogen, phosphorus, potassium, boron chelate fertilizer is 100-260 times, and the dilution multiple of calcium, magnesium chelate fertilizer is 280 times. The spraying time is in the morning or evening when it is dry, sunny and windless. At this time, the stomata of the leaves are more open, the absorption of fertilizer is large, and the metabolism of key enzymes can be quickly induced, achieving the effect of promoting growth and increasing yield;

[0023] (2) Each time you spray, spray the leaf surface and back evenly without droplets. As the biomass of rapeseed increases, gradually increase the spraying amount. Spray once every other week, and spray no more than 5 times in a row until the rapeseed is mature and ready for harvest.

[0024] Preferably, according to the present invention, in step (1), when used in combination, nitrogen, phosphorus, potassium and boron chelated fertilizer is sprayed first, and calcium and magnesium chelated fertilizer is sprayed the next day.

[0025] Beneficial effects of the present invention:

[0026] 1. The liquid organic chelated foliar fertilizer for Shanghai green of the present invention has a simple preparation method, low cost, simple production process, and rich content of mineral elements, providing a rich source of nutrition for the high-quality growth of Shanghai green.

[0027] 2. The sorbitol of the present invention can be used as a chelating agent to carry mineral elements into the body of the Shanghai green, balance the nutrient supply between the roots, stems and leaves, and improve the yield and quality of the Shanghai green. Sorbitol, as a primary product of plant photosynthesis, is easily absorbed by the leaves of the Shanghai green, which can improve the stress resistance of the Shanghai green and improve its quality.

[0028] 3. The liquid organic chelated foliar fertilizer for Shanghai green of the present invention is a foliar spray fertilizer. Compared with the traditional root fertilizer, it has a smaller dosage and effectively improves the fertilizer utilization efficiency. It is particularly suitable for large-scale cultivation of Shanghai green. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0030] Example 1

[0031] Shanghai Qing special liquid organic chelated foliar fertilizer, including nitrogen, phosphorus, potassium and boron chelated fertilizer and calcium and magnesium chelated fertilizer,

[0032] The nitrogen, phosphorus, potassium and boron chelate fertilizer includes the following raw materials by weight: 97 parts of deionized water, 29 parts of sorbitol liquid (mass concentration is 70%), 10 parts of urea, 15 parts of potassium dihydrogen phosphate and 3 parts of boric acid;

[0033] The calcium-magnesium chelate fertilizer comprises the following raw materials in weight: 39 parts of deionized water, 109 parts of sorbitol liquid (mass concentration is 70%), 50 parts of calcium nitrate and 55 parts of magnesium nitrate.

[0034] The preparation method of the liquid organic chelated foliar fertilizer for Shanghai Qing comprises the following steps:

[0035] (1) Preparation of nitrogen, phosphorus, potassium and boron chelate fertilizer:

[0036] 1) Dissolve the weighed sorbitol liquid in deionized water according to the ratio, heat it in a constant temperature water bath in an electromagnetic stirring reactor, control the material temperature in the reactor at 65° C., set the stirring speed to 120 r / min, and stir until the mixed liquid is uniform to obtain a sorbitol aqueous solution;

[0037] 2) adding 8-50 parts of urea, 15 parts of potassium dihydrogen phosphate, and 3 parts of boric acid to the sorbitol aqueous solution in sequence, and after the components are fully mixed, a mixed solution is obtained;

[0038] 3) Chelating reaction: keep heating at 65°C in a constant temperature water bath, stir the mixed solution continuously at a speed of 120r / min, react for 30min, take out and let stand, cool at room temperature, and obtain nitrogen, phosphorus, potassium and boron chelated fertilizer.

[0039] (2) Preparation of calcium-magnesium chelated fertilizer:

[0040] a. Dissolve the weighed sorbitol liquid in deionized water according to the ratio, heat it in a constant temperature water bath in an electromagnetic stirring reactor, control the material temperature in the reactor at 65°C, set the stirring speed to 120r / min, and stir until the mixed liquid is uniform to obtain a sorbitol aqueous solution;

[0041] b. Add 50 parts of calcium nitrate and 55 parts of magnesium nitrate to the sorbitol aqueous solution in sequence, and after the components are fully mixed, a mixed solution is obtained;

[0042] c. Chelating reaction: Keep the water bath heated at 65°C, stir the mixed solution at 120r / min, react for 30min, take out and let stand, cool at room temperature to obtain calcium-magnesium chelated fertilizer.

[0043] The Shanghai green special liquid organic chelate foliar fertilizer prepared in this embodiment was tested for fertilizer efficiency. The rapeseed variety for the test was "Jiaoyan Tokyo Green". The test adopted a randomized block design, repeated 5 times, and set up 3 treatments: no foliar fertilizer (control), composite inorganic salt fertilizer (potassium dihydrogen phosphate, boric acid, urea, calcium nitrate, magnesium nitrate) and Shanghai green special liquid organic chelate foliar fertilizer of Example 1, all of which were sprayed on the leaves. The nitrogen, phosphorus, potassium and boron chelate fertilizer involved in this embodiment was diluted 100 times with water, and the calcium and magnesium chelate fertilizer was diluted 280 times with water. The spraying time was a dry, sunny and windless morning. After two weeks of planting, the rapeseed entered the vigorous growth period and began to spray. It was sprayed once every 5 days, and a total of 5 times. The experimental results are shown in Table 1.

[0044] Table 1 is a comparison table of the dry matter weight of Shanghai green after spraying with liquid organic chelated foliar fertilizer for Shanghai green, the control, and spraying with compound inorganic salt fertilizer. As shown in Table 1, the dry matter weight of Shanghai green sprayed with liquid organic chelated foliar fertilizer increased by 144.1% compared with the control treatment, and the dry matter weight increased by 56.9% compared with spraying with compound inorganic salt fertilizer. This shows that the liquid organic chelated foliar fertilizer for Shanghai green can effectively promote the growth of Shanghai green, and the difference is significant compared with the control and compound inorganic salt fertilizer.

[0045] Table 1

[0046]

[0047]

[0048] Example 2

[0049] The liquid organic chelated foliar fertilizer for Shanghai green described in Example 1 is different in that:

[0050] The nitrogen, phosphorus, potassium and boron chelate fertilizer includes the following raw materials by weight: 97 parts of deionized water, 29 parts of sorbitol liquid (mass concentration is 70%), 50 parts of urea, 15 parts of potassium dihydrogen phosphate and 3 parts of boric acid. The rest is carried out as in Example 1.

[0051] The Shanghai green special liquid organic chelate foliar fertilizer prepared in this embodiment was tested for fertilizer efficiency. The rapeseed variety for the test was "Jiaoyan Tokyo Green". The test adopted a randomized block design, repeated 5 times, and set up 3 treatments: no foliar fertilizer spraying (control), compound inorganic salt fertilizer (potassium dihydrogen phosphate, boric acid, urea) and the Shanghai green special liquid organic chelate foliar fertilizer of Example 2, all of which were sprayed on the leaves. The nitrogen, phosphorus, potassium and boron chelate fertilizer involved in this embodiment was diluted 260 times with water, and the calcium and magnesium chelate fertilizer was diluted 280 times with water. The spraying time was a dry, sunny and windless morning. After two weeks of planting, the rapeseed entered the vigorous growth period and began to spray. It was sprayed once every 5 days, and sprayed 5 times in total. The comparison of the chlorophyll content of Shanghai green after spraying the Shanghai green special liquid organic chelate foliar fertilizer and the control and spraying the compound inorganic salt fertilizer is shown in Table 2.

[0052] Table 2

[0053] deal with Chlorophyll content / SPAD Comparison 47.35 Compound inorganic salt fertilizer 49.47 Shanghai Qing Special Liquid Organic Chelated Foliar Fertilizer 69.70

[0054] As shown in Table 2, compared with the control treatment, the chlorophyll content of Shanghai green increased by 47.2% with the liquid organic chelated foliar fertilizer for Shanghai green, and increased by 40.9% with the spraying of compound inorganic salt fertilizer. This shows that the liquid organic chelated foliar fertilizer for Shanghai green can effectively improve the photosynthesis of Shanghai green, and the difference is significant compared with the control and compound inorganic salt fertilizer.

[0055] Example 3

[0056] The liquid organic chelated foliar fertilizer for Shanghai green described in Example 1 is different in that:

[0057] The nitrogen, phosphorus, potassium and boron chelate fertilizer includes the following raw materials by weight: 97 parts of deionized water, 29 parts of sorbitol liquid (mass concentration is 70%), 33 parts of urea, 15 parts of potassium dihydrogen phosphate and 3 parts of boric acid. The rest is carried out as in Example 1.

[0058] The liquid organic chelate foliar fertilizer for Shanghai green prepared in this embodiment was tested for fertilizer efficiency. The rapeseed variety for the test was "Jiaoyan Tokyo Green". The test was designed in a randomized block, repeated 5 times, and 3 treatments were set: no foliar fertilizer (control), compound inorganic salt fertilizer (potassium dihydrogen phosphate, boric acid, urea) and the liquid organic chelate foliar fertilizer for Shanghai green of Example 3, all of which were sprayed on the leaves. The nitrogen, phosphorus, potassium and boron chelate fertilizer involved in this embodiment was diluted 190 times with water, and the calcium and magnesium chelate fertilizer was diluted 280 times with water. The spraying time was a dry, sunny and windless morning. After two weeks of planting, the rapeseed entered the vigorous growth period and began to spray. It was sprayed once every 5 days, and sprayed 5 times in total. The fresh weight comparison of the Shanghai green after spraying the liquid organic chelate foliar fertilizer for Shanghai green and the control and spraying the compound inorganic salt fertilizer is shown in Table 3.

[0059] Table 3

[0060] deal with Average fresh weight / g Comparison 26.30 Compound inorganic salt fertilizer 32.64 Shanghai Qing Special Liquid Organic Chelated Foliar Fertilizer 38.73

[0061] As shown in Table 3, the fresh weight of Shanghai green sprayed with liquid Shanghai green special organic chelated foliar fertilizer increased by 47.3% compared with the control treatment, and the fresh weight increased by 18.7% compared with the spraying of compound inorganic salt fertilizer. This shows that liquid Shanghai green special organic chelated foliar fertilizer can effectively promote the growth of Shanghai green, and the difference is significant compared with conventional fertilization and compound inorganic salt fertilizer.

[0062] Example 4

[0063] The liquid organic chelated foliar fertilizer for Shanghai green described in Example 1 is different in that:

[0064] The nitrogen, phosphorus, potassium and boron chelate fertilizer includes the following raw materials by weight: 97 parts of deionized water, 29 parts of sorbitol liquid (mass concentration is 70%), 17 parts of urea, 15 parts of potassium dihydrogen phosphate and 3 parts of boric acid. The rest is carried out as in Example 1.

[0065] The liquid organic chelate foliar fertilizer for Shanghai green prepared in this embodiment was tested for fertilizer efficiency. The rapeseed variety for the test was "Jiaoyan Tokyo Green". The test was designed in a randomized block, repeated 5 times, and 3 treatments were set: no foliar fertilizer (control), compound inorganic salt fertilizer (potassium dihydrogen phosphate, boric acid, urea) and the liquid organic chelate foliar fertilizer for Shanghai green of Example 3, all of which were sprayed on the leaves. The nitrogen, phosphorus, potassium and boron chelate fertilizers involved in this embodiment were diluted 190 times with water, and the calcium and magnesium chelate fertilizers were diluted 280 times with water. The spraying time was a dry, sunny and windless morning. After two weeks of planting, the rapeseed entered the vigorous growth period and began to spray. It was sprayed once every 5 days, and sprayed 5 times in total. The comparison of the vitamin C content of Shanghai green after applying the liquid organic chelate foliar fertilizer for Shanghai green and the control and spraying the compound inorganic salt fertilizer is shown in Table 4.

[0066] Table 4

[0067]

[0068]

[0069] As shown in Table 4, the vitamin C content of the liquid organic chelated foliar fertilizer for Shanghai green increased by 13.24% compared with the control treatment, and increased by 30.5% compared with the spraying of compound inorganic salt fertilizer. This shows that the liquid organic chelated foliar fertilizer for Shanghai green can effectively improve the quality of Shanghai green, and the difference is significant compared with the control treatment and compound inorganic salt fertilizer.

[0070] In summary, through a series of fertilizer efficiency experiments, the liquid organic chelated foliar fertilizer for Shanghai green provided by the present invention was found to effectively increase the fresh weight and dry matter weight of Shanghai green, and increase the chlorophyll and vitamin C content, thereby achieving the effect of increasing production and improving quality.

[0071] Although the present invention has been described in detail by way of preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and such modifications or substitutions shall be within the scope of the present invention. Any person of ordinary skill in the art may easily conceive of changes or substitutions within the technical scope disclosed by the present invention, and such changes or substitutions shall be within the scope of protection of the present invention.

Claims

1. A liquid organic chelated foliar fertilizer for Shanghai Qing, comprising nitrogen, phosphorus, potassium and boron chelated fertilizer and calcium and magnesium chelated fertilizer, The nitrogen, phosphorus, potassium and boron chelate fertilizer comprises the following raw materials by weight: 97 parts of deionized water, 29 parts of sorbitol liquid with a mass concentration of 70%, 8-50 parts of urea, 15 parts of potassium dihydrogen phosphate and 3 parts of boric acid; The calcium-magnesium chelate fertilizer comprises the following raw materials in weight: 39 parts of deionized water, 109 parts of sorbitol liquid with a mass concentration of 70%, 50 parts of calcium nitrate and 55 parts of magnesium nitrate.

2. The method for preparing the liquid organic chelated foliar fertilizer for Shanghai green as claimed in claim 1 comprises the following steps: (1) Preparation of nitrogen, phosphorus, potassium and boron chelate fertilizer: 1) Dissolving sorbitol liquid in deionized water according to the ratio, heating in a constant temperature water bath in an electromagnetic stirring reactor, controlling the material temperature in the reactor at 65° C., setting the stirring speed at 120 r / min, stirring until the mixed liquid is uniform, and obtaining a sorbitol aqueous solution; 2) adding 8-50 parts of urea, 15 parts of potassium dihydrogen phosphate, and 3 parts of boric acid to the sorbitol aqueous solution in sequence, and after the components are fully mixed, a mixed solution is obtained; 3) Chelating reaction: keep heating in a constant temperature water bath at 65°C, continuously stir the mixed solution at a speed of 120r / min, react for 30min, take out and let stand, cool at room temperature, and obtain nitrogen, phosphorus, potassium and boron chelate fertilizer; (2) Preparation of calcium-magnesium chelated fertilizer: a. Dissolve sorbitol liquid in deionized water according to the ratio, heat in a constant temperature water bath in an electromagnetic stirring reactor, control the material temperature in the reactor at 65°C, set the stirring speed to 120r / min, and stir until the mixed liquid is uniform to obtain a sorbitol aqueous solution; b. Add 50 parts of calcium nitrate and 55 parts of magnesium nitrate to the sorbitol aqueous solution in sequence, and after the components are fully mixed, a mixed solution is obtained; c. Chelating reaction: Keep the water bath heated at 65°C, stir the mixed solution at 120r / min, react for 30min, take out and let stand, cool at room temperature to obtain calcium-magnesium chelated fertilizer.

3. The application of the liquid organic chelated foliar fertilizer for Shanghai Qing according to claim 1, the specific application method is as follows: (1) Spraying is performed according to the growth law of Shanghai green rapeseed. The first spraying is performed 15 days after rapeseed is planted. When spraying, nitrogen, phosphorus, potassium, boron chelate fertilizer and calcium, magnesium chelate fertilizer are diluted and used alone or in combination. The dilution multiple of nitrogen, phosphorus, potassium, boron chelate fertilizer is 100-260 times, and the dilution multiple of calcium, magnesium chelate fertilizer is 280 times. The spraying time is in the morning or evening when it is dry, sunny and windless. At this time, the stomata of the leaves are more open, the absorption of fertilizer is large, and the metabolism of key enzymes can be quickly induced, achieving the effect of promoting growth and increasing yield; (2) Each time you spray, spray the leaf surface and back evenly without droplets. As the biomass of rapeseed increases, gradually increase the spraying amount. Spray once every other week, and spray no more than 5 times in a row until the rapeseed is mature and ready for harvest.

4. The use according to claim 3, characterized in that: Step (1), when used in combination, first spray nitrogen, phosphorus, potassium and boron chelated fertilizer, and the next day spray calcium and magnesium chelated fertilizer.

Images