A method for increasing the yield of sweet potato

Abstract

The present application relates to the technical field of crop planting, in particular to a method for improving the yield of sweet potato, comprising: applying base fertilizer into the soil and ploughing to form a planting ridge; planting sweet potato seedlings on the planting ridge; applying microbial agent when the planting ridge is planted for 20-30 days; and spraying sodium casein when the planting ridge is planted for 40-50 days; the microbial agent comprises Bacillus siamensis, Bacillus marinus and Bacillus licheniformis. The microbial agent used in the present application contains Bacillus siamensis, Bacillus marinus and Bacillus licheniformis, and after application, the yield of sweet potato is improved, and the soluble sugar content in sweet potato is improved; the sodium casein used improves the content of anthocyanin in sweet potato.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of crop planting technology, in particular to a method for improving the yield of sweet potato. BACKGROUND

[0002] Sweet potato, also known as sweet potato, is a climbing herbaceous vine, and the top branches of the underground tuber are enlarged into an oval-shaped tuber. Sweet potato is a short-day crop that likes light, and is warm-loving and not cold-tolerant, and is relatively drought-tolerant. From the utilization approach, sweet potato can be divided into starch processing type, forage type, sweet potato type, baking type, dual-purpose type, stem tip vegetable type, fruit type, pigment type, medicinal type, etc. Sweet potato has a very high planting coverage in the vast rural areas of China. For a long period of time in history, sweet potato has become the main food of the masses, and is also a good feed for livestock in rural areas of China. Moreover, sweet potato is the fourth largest food crop in China after rice, wheat and corn, and improving the yield and quality of sweet potato will have very important significance. SUMMARY

[0003] In order to solve the above problems, the present application provides a method for improving the yield of sweet potato, which not only improves the yield of sweet potato, but also improves the content of soluble sugar and anthocyanin in sweet potato.

[0004] In order to achieve the above purpose, the present application provides the following technical scheme:

[0005] The present application provides a method for improving the yield of sweet potato, comprising the following steps:

[0006] 1) Apply base fertilizer to the soil and till, and form a planting ridge;

[0007] 2) Plant sweet potato seedlings on the planting ridge in step 1), apply microbial inoculant 20-30 days after planting, and spray sodium casein 40-50 days after planting;

[0008] The microbial inoculant comprises Bacillus siamensis, Bacillus marinus and Bacillus licheniformis.

[0009] Preferably, the content of Bacillus siamensis in the microbial inoculant in step 2) is 1-3 x 10 10 CFU / mL, the content of Bacillus marinus is 2-5 x 10 9 CFU / mL, and the content of Bacillus licheniformis is 3-6 x 10 11 CFU / mL.

[0010] Preferably, the application amount of the microbial inoculant is 20-30 kg / acre, and is applied with water, and the first application is followed by a second application after an interval of 40-50 days.

[0011] Preferably, the application amount of casein sodium in step 2) is 1-3 kg / mu, and the second spraying is performed after 40-50 days of the first spraying.

[0012] Preferably, the base fertilizer in step 1) includes one or more of rotten chicken manure, rotten sheep manure and rotten cow manure.

[0013] Preferably, the application amount of the base fertilizer in step 1) is 2000-3000 kg / mu.

[0014] Preferably, the depth of ploughing in step 1) is 35-45 cm.

[0015] Preferably, the spacing of the planting ridge in step 1) is 60-70 cm, the height of the planting ridge is 30-35 cm, and the width of the bottom of the planting ridge is 25-35 cm.

[0016] Preferably, the planting density of sweet potato seedlings in step 2) is 4000-5000 plants / mu.

[0017] Preferably, the soil in step 1) includes sandy loam.

[0018] The present application has the following beneficial effects:

[0019] The microbial agent used in the present application contains Bacillus siamensis, marine Bacillus and Bacillus licheniformis, which can improve the yield of sweet potato and the content of soluble sugar in sweet potato after application; and the casein sodium used can improve the content of anthocyanin in sweet potato. DETAILED DESCRIPTION

[0020] The present application provides a method for improving the yield of sweet potato, which includes the following steps:

[0021] 1) applying base fertilizer into the soil and ploughing to form a planting ridge;

[0022] 2) planting sweet potato seedlings on the planting ridge in step 1), applying microbial agent after 20-30 days of planting, and spraying casein sodium after 40-50 days of planting; the microbial agent includes Bacillus siamensis, marine Bacillus and Bacillus licheniformis.

[0023] The base fertilizer is applied to the soil and ploughed to form a planting ridge. In the present application, the base fertilizer preferably comprises one or more of decomposed chicken manure, decomposed sheep manure and decomposed cow manure. The source of the decomposed chicken manure, decomposed sheep manure and decomposed cow manure is not particularly limited in the present application, and the manure can be decomposed by using conventional commercial or conventional decomposition methods. In the present application, the base fertilizer is preferably applied at a rate of 2000-3000 kg / acre. In the present application, the ploughing is preferably performed to a depth of 35-45 cm. In the present application, the planting ridge is preferably formed after the soil is broken up and leveled after ploughing. In the present application, the planting ridge preferably has a spacing of 60-70 cm, a height of 30-35 cm and a base width of 25-35 cm. In the present application, the soil preferably comprises sandy loam.

[0024] The sweet potato seedlings are planted on the formed planting ridge, a microbial agent is applied 20-30 days after planting, and casein sodium is sprayed 40-50 days after planting. The microbial agent comprises Bacillus siamensis, Bacillus marinus and Bacillus licheniformis.

[0025] In the present application, the content of Bacillus siamensis in the microbial agent is preferably 1-3 x 10 10 CFU / mL, the content of Bacillus marinus is preferably 2-5 x 10 9 CFU / mL, and the content of Bacillus licheniformis is preferably 3-6 x 10 11 CFU / mL. The source of the microbial agent is not particularly limited in the present application, and the microbial agent can be prepared by using conventional microbial agent preparation methods. The source of Bacillus siamensis, Bacillus marinus and Bacillus licheniformis is not particularly limited in the present application, and conventional strains can be used. In the present application, the microbial agent is preferably applied at a rate of 20-30 kg / acre, and is applied by flushing with water. The microbial agent is preferably applied again 40-50 days after the first application. In the present application, the casein sodium is preferably applied at a rate of 1-3 kg / acre, and is preferably sprayed again 40-50 days after the first application. In the present application, the planting density of the sweet potato seedlings is preferably 4000-5000 plants / acre.

[0026] The variety of the sweet potato is not particularly limited in the present application, and conventional sweet potato varieties can be used. The other management methods for planting sweet potatoes are not particularly limited in the present application, and conventional methods can be used.

[0027] In order to further illustrate the present application, the present application is described in detail below with reference to the examples, but they should not be construed as limiting the scope of the present application.

[0028] Example 1

[0029] A method for increasing the yield of sweet potatoes:

[0030] Sweet potato variety: Guijing sweet potato No. 8;

[0031] The experimental time is: 2023.

[0032] The specific method is as follows:

[0033] 1) In early April, rotten chicken manure is applied to sandy soil and plowed, the plowing depth is 40 cm, the application amount is 2000 kg / mu, the soil is crushed and the ground is leveled, and then the planting ridge is formed, the planting ridge spacing is 60 cm, the ridge height is 35 cm, and the bottom width is 35 cm;

[0034] 2) Plant sweet potato seedlings on the planting ridge, the planting depth is 5 cm, plant 4500 plants per mu, check the survival situation within 7 days after planting, and replant dead seedlings in time; 25 days after planting, apply microbial inoculant once, and then apply it again after 50 days, the application amount of each time is 25 kg / mu, and it is applied with water, wherein the bacterial content of Bacillus siamensis in the microbial inoculant is 2×10 10 CFU / mL, the bacterial content of Bacillus marinus is 3.5×10 9 CFU / mL, and the bacterial content of Bacillus licheniformis is 4.5×10 11 CFU / mL;

[0035] Spray casein sodium once 50 days after planting, the application amount is 2 kg / mu, and then spray it again after 50 days, and spray it with water;

[0036] 3) Harvest in time, and ensure that the growth period is more than 120 days.

[0037] Example 2

[0038] A method for increasing the yield of sweet potato:

[0039] The sweet potato variety is Liaosuo 30;

[0040] The experimental time is: 2023.

[0041] The specific method is as follows:

[0042] 1) In early April, rotten sheep manure is applied to sandy soil and plowed, the plowing depth is 45 cm, the application amount is 2500 kg / mu, the soil is crushed and the ground is leveled, and then the planting ridge is formed, the planting ridge spacing is 60 cm, the ridge height is 35 cm, and the bottom width is 35 cm;

[0043] 2) Plant sweet potato seedlings on the planting ridge, the planting depth is 6 cm, plant 4500 plants per mu, check the survival situation within 7 days after planting, and replant dead seedlings in time; 30 days after planting, apply microbial inoculant once, and then apply it again after 40 days, the application amount of each time is 20 kg / mu, and it is applied with water, wherein the bacterial content of Bacillus siamensis in the microbial inoculant is 2.5×1010 CFU / mL, the bacterial content of Bacillus oceaneus was 4.5 x 10 9 CFU / mL, the bacterial content of Bacillus licheniformis was 5 x 10 11 CFU / mL;

[0044] Spray casein sodium once at 40d of planting, the application amount is 2.5kg / mu, spray again after 40d, spray casein sodium mixed with water;

[0045] 3) Harvest in time, ensure the growth period is more than 120d.

[0046] Example 3

[0047] A method for improving the yield of sweet potato:

[0048] The sweet potato variety is Guijingshu No. 8;

[0049] The experimental time is 2023.

[0050] The specific method is as follows:

[0051] 1) In early April, rotten cow dung is applied to sandy soil and ploughed, the ploughing depth is 40cm, the application amount is 2500kg / mu, the soil is crushed and the ground is leveled, and then the planting ridge is formed, the planting ridge spacing is 60cm, and the ridge height is 35cm, the bottom width is 35cm;

[0052] 2) Plant sweet potato seedlings on the planting ridge, the planting depth is 5cm, plant 4500 plants per mu, check the survival situation within 7d of planting, and replant in time if dead seedlings are found; Apply microbial inoculant once at 30d of planting, and apply again after 50d, the application amount of each time is 25kg / mu, and the microbial inoculant is applied with water, wherein the bacterial content of Bacillus siamensis is 1.5 x 10 10 CFU / mL, the bacterial content of Bacillus oceaneus is 2.5 x 10 9 CFU / mL, the bacterial content of Bacillus licheniformis is 3.5 x 10 11 CFU / mL;

[0053] Spray casein sodium once at 50d of planting, the application amount is 1.5kg / mu, spray again after 50d, and spray casein sodium mixed with water;

[0054] 3) Harvest in time, ensure the growth period is more than 120d.

[0055] Example 4

[0056] A method for improving the yield of sweet potato:

[0057] The sweet potato variety is Liaoshu No. 30;

[0058] The experimental time is: 2023.

[0059] The specific method is as follows:

[0060] 1) In early April, rotten sheep manure is applied to sandy loam soil and plowed, the plowing depth is 45 cm, the application amount is 2500 kg / mu, the soil is crushed and the ground is leveled, and then the planting ridge is formed, the planting ridge spacing is 60 cm, the ridge height is 35 cm, and the bottom width is 35 cm;

[0061] 2) Plant sweet potato seedlings on the planting ridge, the planting depth is 6 cm, plant 4500 plants per mu, check the survival situation within 7 days after planting, and replant dead seedlings in time; 25 days after planting, apply microbial inoculant once, and then apply it again after 40 days, the application amount of each time is 30 kg / mu, and it is applied with water, wherein the bacterial content of Bacillus siamensis in the microbial inoculant is 2.5 x 10 10 CFU / mL, the bacterial content of Bacillus marinus is 4.5 x 10 9 CFU / mL, and the bacterial content of Bacillus licheniformis is 5 x 10 11 CFU / mL;

[0062] Spray casein sodium once 40 days after planting, the application amount is 2 kg / mu, and then spray it again after 40 days, and spray it after mixing with water;

[0063] 3) Harvest in time, and ensure that the growth period is more than 120 days.

[0064] Comparative example 1

[0065] A method for improving the yield of sweet potatoes:

[0066] The sweet potato variety is Guijingshu No. 8;

[0067] The experimental time is: 2023.

[0068] The specific method is as follows:

[0069] 1) In early April, rotten chicken manure is applied to sandy loam soil and plowed, the plowing depth is 40 cm, the application amount is 2000 kg / mu, the soil is crushed and the ground is leveled, and then the planting ridge is formed, the planting ridge spacing is 60 cm, the ridge height is 35 cm, and the bottom width is 35 cm;

[0070] 2) Plant sweet potato seedlings on the planting ridge, the planting depth is 5 cm, plant 4500 plants per mu, check the survival situation within 7 days after planting, and replant dead seedlings in time; 50 days after planting, spray casein sodium once, the application amount is 2 kg / mu, and then spray it again after 50 days, and spray it after mixing with water;

[0071] 3) Harvest in time, and ensure that the growth period is more than 120 days.

[0072] Comparative Example 2

[0073] A method for improving the yield of sweet potato:

[0074] The sweet potato variety is Liaoshu 30.

[0075] The experimental time is 2023.

[0076] The specific method is as follows:

[0077] 1) In early April, rotten sheep manure is applied to sandy soil and plowed, the plowing depth is 45 cm, the application amount is 2500 kg / mu, and the planting ridge is formed after soil crushing and ground leveling, the planting ridge spacing is 60 cm, the ridge height is 35 cm, and the bottom width is 35 cm;

[0078] 2) Plant sweet potato seedlings on the planting ridge, the planting depth is 6 cm, plant 4500 plants per mu, check the survival situation within 7 days after planting, find dead seedlings and replant in time; 30 days after planting, apply microbial inoculant once, and apply again after 40 days, the application amount of each time is 20 kg / mu, and the microbial inoculant is applied with water, wherein the bacterial content of Bacillus siamensis in the microbial inoculant is 2.5 x 10 10 CFU / mL, the bacterial content of Bacillus marinus is 4.5 x 10 9 CFU / mL, and the bacterial content of Bacillus licheniformis is 5 x 10 11 CFU / mL;

[0079] 3) Harvest in time to ensure that the growth period is more than 120 days.

[0080] Harvest the sweet potatoes of Examples 1-4 and Comparative Examples 1-2, count the yield of sweet potatoes, and detect the anthocyanin and soluble sugar content in the sweet potatoes, and the results are shown in Table 1.

[0081] Table 1: Results of sweet potato yield, anthocyanin and soluble sugar content

[0082] Yield kg / acre Soluble sugar mg / g Anthocyanins mg / 100 g Example 1 2645 68.9 120.5 Example 2 5226 60.4 112.6 Example 3 2762 67.4 115.8 Example 4 5287 70.5 108.4 Comparative Example 1 1842 40.2 102.5 Comparative Example 2 4235 58.6 75.3

[0083] From the above examples and comparative examples, it can be concluded that the method provided by the present application improves the yield of sweet potato and the soluble sugar content in sweet potato, and casein sodium improves the anthocyanin content.

[0084] Although the above examples have made a detailed description of the present application, it is only a part of the embodiments of the present application, not all the embodiments, and other embodiments can be obtained according to the present embodiments without creativity, which are within the protection scope of the present application.

Claims

1. A method for increasing sweet potato yield, characterized in that, The following steps are involved: 1) Apply base fertilizer to the soil, till the soil, and build ridges for planting; 2) Planting sweet potato seedlings on the planting ridges described in step 1), applying a microbial agent 20 to 30 days after planting, and spraying sodium casein 40 to 50 days after planting; The microbial agents are Bacillus siamese, Bacillus marineus and Bacillus licheniformis; The sodium casein increases the anthocyanin content of sweet potatoes; The bacterial content of Bacillus siamese in the microbial agent in step 2) is 1 to 3×10 10 CFU / mL, the bacterial content of marine Bacillus is 2~5×10 9 CFU / mL, the bacterial content of Bacillus licheniformis is 3~6×10 11 CFU / mL; The application rate of the microbial agent is 20-30 kg / mu, applied with water, and applied again after 40-50 days of the first application. In the step 2), the application amount of casein sodium is 1-3 kg / mu, and spraying is repeated 40-50 days after the first application; The depth of plowing in step 1) is 35 to 45 cm; In step 1), the spacing of the planting ridges is 60 to 70 cm, the ridge height is 30 to 35 cm, and the bottom width is 25 to 35 cm; In the step 2), the planting density of the sweet potato seedlings is 4,000 to 5,000 plants per mu.

2. The method according to claim 1, characterized in that The base fertilizer in step 1) comprises one or more of decomposed chicken manure, decomposed sheep manure and decomposed cow manure.

3. The method according to claim 1, characterized in that The application amount of the base fertilizer in step 1) is 2000-3000 kg / mu.

4. The method according to claim 1, wherein The soil in step 1) comprises sandy loam.