Fertilizer special for flowering period of dual-purpose oilseed rape and preparation method

Abstract

The invention provides a special fertilizer for oilseed rape in the bolting period and a preparation method, and relates to the field of agriculture, the special fertilizer for oilseed rape in the bolting period comprises a root fertilizer, an additional fertilizer and a leaf fertilizer, the root fertilizer comprises brassinolide, enzymes and auxiliary materials, and the additional fertilizer comprises brassinolide, monoammonium phosphate, monopotassium phosphate, boric acid, magnesium sulfate and calcium superphosphate. The leaf fertilizer is prepared from brassinolide, diethyl aminoethyl hexanoate, gibberellin, ethylenediamine tetraacetic acid, potassium sulfate, magnesium chloride, sodium dodecyl benzene sulfonate and calcium lignosulphonate. According to the special fertilizer for the oilseed rape in the flowering Chinese cabbage stage, the influence of picking of the flowering Chinese cabbage on the growth cycle of the oilseed rape is avoided, the yield of the flowering Chinese cabbage and the yield of the oilseed rape seeds are guaranteed, the growth cycle of the oilseed rape for the oilseed rape and the vegetables is shortened, and the problems of soil hardening, permeability reduction, soil nutrient loss, rampant diseases and pests and the like can be remarkably solved.

Description

Technical Field

[0001] The invention relates to the field of agriculture, and in particular to a special fertilizer for rapeseed in the stalk stage and a preparation method thereof. Background Art

[0002] The efficient cultivation of rapeseed for both oil and vegetables refers to the early-stage cultivation, in which the main stem cauliflower is picked around the Spring Festival as seasonal vegetables or dehydrated vegetables for consumption. Heavy application of cauliflower fertilizer is used to promote the germination of lower dormant buds to form lower branches, and rapeseed is harvested based on the branch angles, achieving "two harvests from one crop". It can harvest rapeseed with the same yield of conventional rapeseed and several cauliflower cauliflowers, with an acreage yield of 200 to 300 kilograms of cauliflower, increasing cash income. It is suitable for promotion in suburban double-cropping rapeseed production areas and areas with dehydrated vegetable processing capabilities.

[0003] Although there are some rapeseed cultivation techniques for both oil and vegetables, due to the growth characteristics of rapeseed, after the stalks of rapeseed are picked, it will more or less have a certain impact on the normal growth of rapeseed. Although the impact on the final yield is small under the intervention of some auxiliary cultivation techniques, it may still extend the growth cycle, thus bringing hidden impacts to the later rotation crops. For example, in the case of rotation corn, the final unit price of early-maturing corn and normal-maturing corn may differ by 40% to 50% due to the difference of five to ten days before and after the picking period of fresh corn husks. In addition, due to the continuous cropping of rapeseed production areas for many years, coupled with the rampant use of pesticides and fertilizers for many years, the problems of soil compaction, reduced permeability, soil nutrient loss, rampant pests and diseases are becoming more and more serious. At present, there is no special fertilizer for the rapeseed in the stalk stage, which can promote the rapeseed to enter the stalk stage, accelerate the bolting of rapeseed in the stalk stage, and significantly improve the problems of soil compaction, reduced permeability, soil nutrient loss, rampant diseases and insect pests. Summary of the invention

[0004] The present invention provides a special fertilizer for rapeseed stalks, which avoids the influence of picking rapeseed stalks on the growth cycle of rapeseed, shortens the growth cycle of rapeseed while ensuring the yield of rapeseed stalks and rapeseed, and can significantly improve the problems of soil compaction, reduced permeability, soil nutrient loss, rampant pests and diseases, etc. A preparation method of the special fertilizer for rapeseed stalks is also provided.

[0005] The present invention is achieved through the following technical solutions:

[0006] A special fertilizer for rapeseed in the stalk stage of both oil and vegetable use, comprising root fertilizer, topdressing fertilizer and foliar fertilizer. The root fertilizer is brassinolide, enzyme and auxiliary materials; the topdressing fertilizer is brassinolide, monoammonium phosphate, potassium dihydrogen phosphate, boric acid, magnesium sulfate and superphosphate; the foliar fertilizer is brassinolide, diethylaminoethanol caproate, gibberellin, ethylenediaminetetraacetic acid, potassium sulfate, magnesium chloride, sodium dodecylbenzene sulfonate and calcium lignin sulfonate.

[0007] Furthermore, the components of the root fertilizer are as follows by weight percentage:

[0008] 0.1% to 1% brassinolide, 25% to 35% enzyme, and 65% to 70% auxiliary materials.

[0009] Furthermore, the production steps of the enzyme in the root fertilizer are:

[0010] Aged fallen leaves of rapeseed are collected, chopped and put into a sealed container, brown sugar water with a concentration of 5% is added to cover the chopped aged fallen leaves of rapeseed, and then 0.1% by weight of enzyme bacteria is added. The container is sealed and fermented for 150 days. The container is opened and stirred once every 30 days for the first 90 days, opened and stirred once every 10 days for the next 50 days, and stirred evenly after opening the container on the 150th day to obtain the enzyme.

[0011] Furthermore, the components of the topdressing are as follows by weight percentage:

[0012] 0.1% to 5% brassinolide, 50% to 60% monoammonium phosphate, 25% to 40% potassium dihydrogen phosphate, 1% to 5% boric acid, 1% to 5% magnesium sulfate, and 1% to 5% superphosphate.

[0013] Furthermore, the components of the topdressing are as follows by weight percentage:

[0014] 5% brassinolide, 50% monoammonium phosphate, 35% potassium dihydrogen phosphate, 1% boric acid, 4% magnesium sulfate, and 5% superphosphate.

[0015] Furthermore, the components of the topdressing are as follows by weight percentage:

[0016] 3% brassinolide, 55% monoammonium phosphate, 30% potassium dihydrogen phosphate, 5% boric acid, 3% magnesium sulfate, 4% superphosphate.

[0017] Furthermore, the components of the foliar fertilizer are as follows by weight percentage:

[0018] 20% to 40% of brassinolide, 20% to 40% of diethylaminoethanol caproate, 10% to 20% of gibberellins, 1% to 10% of ethylenediaminetetraacetic acid, 1% to 10% of potassium sulfate, 1% to 10% of magnesium chloride, 1% to 5% of sodium dodecylbenzene sulfonate, and 1% to 5% of calcium lignin sulfonate.

[0019] The present invention also provides a method for preparing a special fertilizer for rapeseed stalks during the oil and vegetable dual-purpose period:

[0020] Add brassinolide to the enzyme, stir thoroughly, then add auxiliary materials and stir evenly as root fertilizer. Weigh brassinolide, monoammonium phosphate, potassium dihydrogen phosphate, boric acid, magnesium sulfate and superphosphate by weight and mix evenly as topdressing. Weigh brassinolide, diethylaminoethanol caproate, gibberellin, ethylenediaminetetraacetic acid, potassium sulfate, magnesium chloride, sodium dodecylbenzenesulfonate and calcium ligninsulfonate by weight and granulate and dry them as foliar fertilizer. Then package the root fertilizer, topdressing fertilizer and foliar fertilizer separately in the ratio of root fertilizer: topdressing fertilizer: foliar fertilizer = 9:40:1, then mix and bag them.

[0021] Furthermore, the auxiliary material is obtained by crushing sun-dried rape stalks.

[0022] Furthermore, the method of using the special fertilizer for rapeseed stalks in the dual-purpose oil and vegetable stage is as follows: when the rapeseed seedlings reach a height of 10 cm, root fertilizer is applied in a dry manner at 9 kg / mu, and then topdressing is applied in an irrigation manner at 10 kg / mu. Two days later, topdressing is applied again in an irrigation manner at 10 kg / mu, and then foliar fertilizer is diluted at 1 kg / mu and applied in a spray manner. Thereafter, topdressing is applied twice in an irrigation manner at 10 kg / mu every five days.

[0023] When rapeseed is about to enter the stalk stage, the vegetative growth and reproductive growth of rapeseed seedlings are carried out simultaneously. At this time, the roots of rapeseed seedlings have formed a strong root network, and the fertilizer tolerance is strong. After applying root fertilizer, the absorption capacity of the roots of rapeseed seedlings can be further increased, the soil structure can be improved, and the subsequent fertility supplementation is convenient. Due to the sufficient supply of fertility, flower bud differentiation can be promoted, and the elongation of the internodes at the base can be increased, so that rapeseed can quickly enter the stalk stage. Two days after the first application of the special fertilizer for the stalk stage of the oil and vegetable dual-purpose rapeseed of the present invention, with the application of topdressing and foliar fertilizer, rapeseed enters the vigorous bolting stage. After the first stalk is picked, it can promote the increase of branches. At this time, rapeseed bolts rapidly, and rapeseed stalks can be picked every day, and the weight continues to increase, and the yield per mu can reach 20kg / day at most. The supplement of topdressing in the later stage is mainly to maintain sufficient nutrient supply. The end of the stalk stage is a critical period for increasing effective branches. After 18 days of using the special root fertilizer for the stalk stage of the oil and vegetable dual-purpose rapeseed of the present invention, the effect of the foliar fertilizer gradually weakens, and the residual fertilizer effect can promote flower bud differentiation, increase pods, increase grains, and increase grain weight. Moreover, since more branches will be added after the stalk is removed, the cold resistance of rapeseed can be improved and the low temperature damage in spring can be alleviated. In addition, the improvement of the soil by enzymes can also avoid the influence of continuous cropping on soil fertility. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are 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 are within the scope of protection of the present invention.

[0025] Example 1

[0026] Aged fallen leaves of rape are collected one year in advance, chopped and put into a sealed container, brown sugar water with a concentration of 5% is added to cover the chopped aged fallen leaves of rape, and then 0.1% by weight of enzyme bacteria is added. The container is sealed and fermented for 150 days. The container is opened and stirred once every 30 days for the first 90 days, opened and stirred once every 10 days for the next 50 days, and stirred evenly after opening the container on the 150th day to obtain the enzyme.

[0027] The enzyme bacteria described in this embodiment uses commercially available Shimamoto enzyme propagation fertilizer. During the fermentation process of the enzyme produced according to this embodiment, the total sugar content gradually decreases, and the total nitrogen, total acid and free amino acid contents show an overall upward trend. After the 150th day, the total sugar content decreased to 19.28% of the original, the total nitrogen content increased to 153.25%, the total acid content increased to 132.58%, and the free amino acid content increased to 276.46%.

[0028] Example 2

[0029] Rapeseed straw was collected one year in advance, dried and crushed as auxiliary materials, 4.5 kg of brassinolide was added to 270 kg of the enzyme produced in Example 1, and after sufficient stirring, 625.5 kg of auxiliary materials were added and stirred evenly as root fertilizer. 200 kg of brassinolide, 2000 kg of monoammonium phosphate, 1400 kg of potassium dihydrogen phosphate, 40 kg of boric acid, 160 kg of magnesium sulfate, and 200 kg of superphosphate were weighed and mixed evenly as topdressing, and 35 kg of brassinolide, 35 kg of dicaprylate were weighed respectively. Ethylaminoethanol ester, 10kg gibberellin, 5kg ethylenediaminetetraacetic acid, 5kg potassium sulfate, 5kg magnesium chloride, 2.5kg sodium dodecylbenzene sulfonate and 2.5kg calcium lignin sulfonate are used as foliar fertilizer after granulation and drying. Then root fertilizer, top dressing fertilizer and foliar fertilizer are separately packaged in the ratio of root fertilizer: top dressing: foliar fertilizer = 9:40:1 and mixed and bagged. That is, 9kg root fertilizer is bagged separately, 40kg top dressing fertilizer is bagged separately, and 1kg foliar fertilizer is bagged separately. Then take one bag of root fertilizer, top dressing fertilizer and foliar fertilizer respectively and bag them together.

[0030] After the rapeseed stalk fertilizer produced by the method of this embodiment is applied to rapeseed, due to the rapid growth of rapeseed, the fertilizer consumption is large, and for some boron-rich soils, there will also be some symptoms of boron deficiency, so a small amount of boron fertilizer still needs to be added. The application of stalk fertilizer should be comprehensively considered according to factors such as the growth of rapeseed, soil fertility, and climatic conditions, so as to achieve scientific fertilization.

[0031] Example 3

[0032] Rape straw is collected one year in advance, dried and crushed as auxiliary materials, 4.5 kg of brassinolide is added to 270 kg of the enzyme produced according to Example 1, and after sufficient stirring, 625.5 kg of auxiliary materials are added and stirred evenly as root fertilizer, 120 kg of brassinolide, 2200 kg of monoammonium phosphate, 1200 kg of potassium dihydrogen phosphate, 200 kg of boric acid, 120 kg of magnesium sulfate, and 160 kg of superphosphate are weighed respectively and mixed evenly as topdressing, 35 kg of brassinolide, 35 kg of diethylaminoethanol caproate, 10 kg of gibberellin, 5 kg of ethylenediaminetetraacetic acid, 5 kg of potassium sulfate, 5 kg of magnesium chloride, 2.5 kg of sodium dodecylbenzene sulfonate, and 2.5 kg of calcium lignin sulfonate are weighed respectively and granulated and dried as foliar fertilizer, and then the root fertilizer, topdressing fertilizer, and foliar fertilizer are independently packaged according to the ratio of root fertilizer: topdressing: foliar fertilizer=9:40:1, and then mixed and bagged.

[0033] The rapeseed stalk fertilizer produced by the method of this embodiment is applied to rapeseed. Since rapeseed grows rapidly and consumes a lot of fertility, it is more necessary to add sufficient boron fertilizer for some boron-deficient soils, but it should not be applied too much. The application of stalk fertilizer should be based on the growth of rapeseed, soil fertility, climatic conditions and other factors to achieve scientific fertilization.

[0034] Example 4

[0035] Taking the Sichuan oil 81 rapeseed variety as an example, a normally cultivated field was selected. When the rapeseed seedlings reached a height of 10 cm, the root fertilizer of the special fertilizer for the stalk stage of the oil and vegetable dual-purpose rapeseed described in Example 2 or 3 was applied by dry application at 9 kg / mu, and then the topdressing of the special fertilizer for the stalk stage of the oil and vegetable dual-purpose rapeseed was applied by irrigation at 10 kg / mu. Two days later, some rapeseed seedlings began to bolt. At this time, the topdressing of the special fertilizer for the stalk stage of the oil and vegetable dual-purpose rapeseed was applied again by irrigation at 10 kg / mu. At the same time, the foliar fertilizer of the special fertilizer for the dual-purpose rapeseed in the stalk stage is diluted at 1kg / mu and applied in a spraying manner. Thereafter, topdressing of the special fertilizer for the dual-purpose rapeseed in the stalk stage is applied twice by irrigation at 10kg / mu every five days. The stalks are not picked on the day of each fertilization, and stalk picking can be started on the second day. This process continues until the seventh day after the last application of the special fertilizer for the dual-purpose rapeseed in the stalk stage, when the fertility weakens and the rapeseed enters the flowering period. Stalk picking is stopped and conventional field management is started.

[0036] Since the rapeseed can be used for both oil and vegetable purposes, sowing can be appropriately advanced. After picking the rapeseed stalks for more than ten days, the rapeseed applied with the special fertilizer for the rapeseed stalk period can quickly enter the flowering period. In addition, due to the application of the root fertilizer of the special fertilizer for the rapeseed stalk period, the rapeseed has outstanding lodging resistance in the later stage and a short maturity period.

[0037] For direct-seeded rapeseed under normal cultivation, stalk fertilizer can be applied earlier in fields with low density (less than 15,000 plants / mu), poor growth, and late sowing period. For fields with appropriate density (about 25,000 plants / mu), early sowing, and sufficient fertilizer application in the early stage, stalk fertilizer should be applied later until the stalk height is 15 cm.

[0038] Example 5

[0039] 1.2 mu of normally cultivated dual-purpose rapeseed Chuanyou 81 in boron-rich soil was selected as the experimental field, and was evenly divided into six 0.2 mu areas in two rows, corresponding to field 1 where the special fertilizer for the dual-purpose rapeseed in the stalk period described in Example 2 was normally applied, field 2 where no water and fertilizer were applied, field 3 where only the special fertilizer for the dual-purpose rapeseed in the stalk period described in Example 2 was applied as root fertilizer, field 4 where only the special fertilizer for the dual-purpose rapeseed in the stalk period described in Example 2 was applied as topdressing, field 5 where only clear water was irrigated when the special fertilizer for the dual-purpose rapeseed in the stalk period described in Example 2 was applied as topdressing, and field 6 where only the special fertilizer for the dual-purpose rapeseed in the stalk period described in Example 2 was applied as foliar fertilizer, and the arrangement is shown in Table 1 below.

[0040] Table 1 Schematic diagram of the arrangement of the boron-enriched experimental plots

[0041] Plot 1 Field 2 Plot 3 Plot 4 Plot 5 Plot 6

[0042] During the stalk period of the dual-purpose rapeseed, the stalks were picked normally according to the same standard and the harvest of each field was counted. After the stalk period, water and fertilizer management and corresponding field management were carried out uniformly and normally. Finally, the harvest of each field was counted after the rapeseed was harvested. The results are shown in Table 2 below.

[0043] Table 2 Summary of benefits of boron-enriched experimental plots

[0044] Rapeseed Rapeseed Rapeseed stalks per mu Rapeseed per mu Plot 1 68.45kg 46.73kg 342.25kg 233.65kg Field 2 33.58kg 28.71kg 167.9kg 143.55kg Plot 3 44.32kg 36.24kg 221.6kg 181.2kg Plot 4 46.89kg 38.46kg 234.45kg 192.3kg Plot 5 41.34kg 32.76kg 206.7kg 163.8kg Plot 6 52.35kg 41.27kg 261.75kg 206.35kg

[0045] It can be seen from the statistical data that on boron-rich soil, if the special fertilizer for rapeseed stalks of the present invention is simply applied, the yield-increasing effect will gradually increase in sequence. If applied at the same time, not only can the rapeseed stalks yield more than 680 catties per mu, but the rapeseed yield can also reach more than 460 catties. Watering alone also has a higher yield than the blank control group, but the advantage is not obvious. This statistical method excludes most of the factors that may affect the yield, and the results are sufficient to reflect that the special fertilizer for rapeseed stalks of the present invention has a very good effect of promoting income increase.

[0046] Example 6

[0047] 1.2 mu of normally cultivated dual-purpose rapeseed Chuanyou 81 in boron-deficient soil was selected as the experimental field, and was evenly divided into six 0.2 mu areas in two rows, corresponding to the field A where the special fertilizer for the dual-purpose rapeseed in the stalk period described in Example 3 was normally applied, the field B where no water and fertilizer were applied, the field C where only the special fertilizer for the dual-purpose rapeseed in the stalk period described in Example 3 was applied as root fertilizer, the field D where only the special fertilizer for the dual-purpose rapeseed in the stalk period described in Example 3 was applied as topdressing, the field E where only clear water was irrigated when the special fertilizer for the dual-purpose rapeseed in the stalk period described in Example 3 was applied as topdressing, and the field F where only the special fertilizer for the dual-purpose rapeseed in the stalk period described in Example 3 was applied as foliar fertilizer, and the arrangement is shown in Table 3 below.

[0048] Table 3 Schematic diagram of the arrangement of the plots in the boron deficiency test

[0049] Plot A Plot B Plot C Plot D Plot E Field F

[0050] During the stalk period of the dual-purpose rapeseed, the harvest of each field was counted after the stalks were picked normally according to the same standard. After the stalk period, water and fertilizer management and corresponding field management were carried out uniformly and normally. Finally, the harvest of each field was counted after the rapeseed was harvested. The results are shown in Table 4 below.

[0051] Table 4 Summary of benefits of boron deficiency experimental plots

[0052] Rapeseed Rapeseed Rapeseed stalks per mu Rapeseed per mu Plot A 64.45kg 42.73kg 322.25kg 213.65kg Plot B 32.56kg 26.75kg 162.8kg 133.75kg Plot C 42.67kg 34.14kg 213.35kg 170.7kg Plot D 43.89kg 35.48kg 219.45kg 177.4kg Plot E 39.59kg 30.37kg 197.95kg 151.85kg Field F 53.78kg 42.83kg 268.9kg 214.15kg

[0053] It can be seen from the statistical data that on boron-deficient soil, if the special fertilizer for rapeseed stalks of the present invention is simply applied, the yield-increasing effect will also gradually increase in sequence, and the effect is that the foliar fertilizer is better than the topdressing, and the topdressing is better than the root fertilizer. If applied at the same time, not only can the rapeseed stalk yield more than 640 catties per mu, but the rapeseed yield can also reach more than 420 catties. Only watering is also higher than the yield of the blank control group, but the advantage is not obvious. This statistical method excludes most of the factors that may affect the yield, and the results are sufficient to reflect that the special fertilizer for rapeseed stalks of the present invention has a very good effect of promoting income increase.

[0054] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution disclosed in the present invention can be achieved, and this document does not limit this.

[0055] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A special fertilizer for rapeseed stalks, comprising root fertilizer, topdressing and foliar fertilizer, characterized in that The root fertilizer is brassinolide, enzyme, and auxiliary materials; the topdressing fertilizer is brassinolide, monoammonium phosphate, potassium dihydrogen phosphate, boric acid, magnesium sulfate, and superphosphate; the foliar fertilizer is brassinolide, diethylaminoethanol caproate, gibberellin, ethylenediaminetetraacetic acid, potassium sulfate, magnesium chloride, sodium dodecylbenzene sulfonate, and calcium lignin sulfonate.

2. The special fertilizer for rapeseed in the stalk stage according to claim 1, characterized in that The components of the root fertilizer are as follows by weight: 0.1% to 1% of brassinolide, 25% to 35% of enzyme, and 65% to 70% of auxiliary materials.

3. The special fertilizer for rapeseed in the stalk stage according to claim 2, characterized in that In the root fertilizer, the production steps of the enzyme are: collecting aged fallen leaves of rapeseed, chopping them and putting them in a sealed container, adding 5% brown sugar water to cover the chopped aged fallen leaves of rapeseed, and then adding 0.1% enzyme bacteria by weight, and fermenting them in a sealed container for 150 days, opening the lid and stirring once every 30 days for the first 90 days, opening the lid and stirring once every 10 days for the next 50 days, and stirring evenly after opening the lid on the 150th day, so as to obtain the enzyme.

4. The special fertilizer for rapeseed in the stalk stage according to claim 1, characterized in that The components of the topdressing are as follows by weight percentage: 0.1% to 5% of brassinolide, 50% to 60% of monoammonium phosphate, 25% to 40% of potassium dihydrogen phosphate, 1% to 5% of boric acid, 1% to 5% of magnesium sulfate, and 1% to 5% of superphosphate.

5. The special fertilizer for rapeseed in the stalk stage according to claim 4, characterized in that The components of the topdressing are as follows by weight percentage: 5% of brassinolide, 50% of monoammonium phosphate, 35% of potassium dihydrogen phosphate, 1% of boric acid, 4% of magnesium sulfate, and 5% of superphosphate.

6. The special fertilizer for rapeseed in the stalk stage according to claim 4, characterized in that The components of the topdressing fertilizer are as follows by weight percentage: 3% of brassinolide, 55% of monoammonium phosphate, 30% of potassium dihydrogen phosphate, 5% of boric acid, 3% of magnesium sulfate, and 4% of superphosphate.

7. The special fertilizer for rapeseed in the stalk stage according to claim 1, characterized in that The components of the foliar fertilizer are as follows by weight: 20% to 40% of brassinolide, 20% to 40% of diethylaminoethanol caproate, 10% to 20% of gibberellins, 1% to 10% of ethylenediaminetetraacetic acid, 1% to 10% of potassium sulfate, 1% to 10% of magnesium chloride, 1% to 5% of sodium dodecylbenzene sulfonate, and 1% to 5% of calcium lignin sulfonate.

8. The method for preparing a special fertilizer for rapeseed in the stalk stage according to claim 1, characterized in that: Add brassinolide to the enzyme, stir thoroughly, then add auxiliary materials and stir evenly as root fertilizer. Weigh brassinolide, monoammonium phosphate, potassium dihydrogen phosphate, boric acid, magnesium sulfate and superphosphate by weight and mix evenly as topdressing. Weigh brassinolide, diethylaminoethanol caproate, gibberellin, ethylenediaminetetraacetic acid, potassium sulfate, magnesium chloride, sodium dodecylbenzenesulfonate and calcium ligninsulfonate by weight and granulate and dry them as foliar fertilizer. Then package the root fertilizer, topdressing fertilizer and foliar fertilizer separately in the ratio of root fertilizer: topdressing fertilizer: foliar fertilizer = 9:40:1, then mix and bag them.

9. The method for preparing a special fertilizer for rapeseed in the stalk stage according to claim 8, characterized in that The auxiliary material is made by crushing the dried rape stalks.

10. The method for using the special fertilizer for rapeseed in the stalk stage according to claim 1, characterized in that: When the rapeseed seedlings reach a height of 10 cm, apply root fertilizer at 9 kg / mu by dry application, and then apply topdressing at 10 kg / mu by irrigation. Two days later, apply topdressing again at 10 kg / mu by irrigation, and then dilute the foliar fertilizer at 1 kg / mu and apply it by spraying. Thereafter, apply topdressing twice every five days at 10 kg / mu by irrigation.