A seedling special fertilizer for improving drought resistance and promoting growth of crops and a preparation method thereof

Abstract

The application provides a seedling stage special fertilizer for improving drought resistance and promoting growth of crops and a preparation method thereof, and belongs to the technical field of fertilizers.The seedling stage special fertilizer comprises the following components in mass fractions: compound fertilizer 60-100 parts, water bug grass extract 5-15 parts, seaweed extract 5-10 parts, compound microbial agent 3-7 parts, proline 2-6 parts, calcium lignosulfonate 0.1-0.3 parts and tetrasodium glutamate diacetate 0.1-0.3 parts.The seedling stage special fertilizer provided by the application is suitable for various crops such as corn, soybean, wheat, flax and sorghum, and can significantly improve the drought resistance and biological accumulation of crop seedlings.The application provides a simple, economical and effective solution for drought resistance cultivation of crops, and has a good market application prospect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fertilizers, in particular to a seedling special fertilizer for improving drought resistance and promoting growth of crops and a preparation method thereof. BACKGROUND

[0002] Under the background of global climate change intensification and water resource shortage, drought has become one of the main abiotic stress factors restricting the sustainable development of agriculture. Drought leads to about 40% of global crop yield loss every year, and the sensitivity of crops to water stress during the seedling stage is particularly significant. The seedling stage is a critical stage of crop growth and development, during which the root development, photosynthetic system establishment and stress resistance ability are laid the foundation. However, the traditional fertilizer design mainly focuses on the universality of nutrient supply, and lacks the pertinence to the physiological characteristics and stress resistance demand of crops during the seedling stage, resulting in the following problems existing for a long time:

[0003] ①The nutrient absorption efficiency of crops during the seedling stage is low, and the soil nutrient availability decreases under drought conditions, which aggravates the contradiction between nutrient supply and demand; and excessive application of nitrogen fertilizer will inhibit the root penetration, reduce the plant osmotic regulation ability, and further weaken the drought resistance.

[0004] ②The existing drought resistance technologies mainly focus on single function, such as improving the soil water holding capacity by using chemical water retaining agent, or reducing transpiration by closing stomata through exogenous hormone induction. However, these methods often have defects such as high cost, environmental risk (such as the degradation problem of polyacrylamide water retaining agent) or short action time, which are difficult to coordinate with the dynamic physiological demand during the seedling stage.

[0005] ③In recent years, the potential of beneficial microorganisms such as PGPR (Plant Growth Promoting Rhizobacteria) and AMF (Arbuscular Mycorrhizal Fungi) in enhancing the stress resistance of crops has attracted much attention, but their application in seedling special fertilizer still faces the problems of insufficient compatibility stability between microbial agents and chemical fertilizers and low colonization efficiency in field environment.

[0006] ④The traditional fertilizer lacks the directional regulation ability of osmotic adjustment substances (such as proline) and antioxidant system, which makes it difficult to break through the metabolic mode of "survival" rather than "growth" of crops under drought conditions.

[0007] Therefore, it is an important way to develop a special fertilizer for seedling crops, which is targeted at the physiological characteristics of seedling crops, and integrates the functions of nutrient strengthening, stress resistance induction and rhizosphere microecological regulation. Through the synergistic design of multiple components, the drought resistance and growth ability of crops are improved, which has urgent significance for guaranteeing food security and efficient use of agricultural resources. SUMMARY

[0008] The present application aims to provide a seedling special fertilizer for improving drought resistance and promoting growth of crops and a preparation method thereof.

[0009] In order to achieve the above-mentioned object, the present application provides the following technical solutions.

[0010] The present application provides a seedling special fertilizer for improving drought resistance and promoting growth of crops, comprising the following components in mass fraction: compound fertilizer 60-100 parts, Eupodium grass extract 5-15 parts, seaweed extract 5-10 parts, compound microbial agent 3-7 parts, proline 2-6 parts, calcium lignosulfonate 0.1-0.3 parts, and tetrasodium glutamate diacetate 0.1-0.3 parts.

[0011] Preferably, the ratio of nitrogen, phosphorus and potassium in the compound fertilizer is 13-17: 18-22: 13-17.

[0012] Preferably, the compound microbial agent comprises Bacillus subtilis, Bacillus velezensis and arbuscular mycorrhizal fungi, and the mass ratio is 1.5-2.5: 0.8-1.2: 0.8-1.2.

[0013] The present application provides a preparation method of the seedling special fertilizer, which comprises mixing the components in the formula amount to obtain the seedling special fertilizer.

[0014] The present application provides an application of the seedling special fertilizer or the seedling special fertilizer obtained by the method in improving drought resistance and / or promoting growth of crops.

[0015] Preferably, the crops include corn, soybean, wheat, flax and sorghum.

[0016] The present application provides a method for improving drought resistance and / or promoting growth of crops, which comprises applying the seedling special fertilizer or the seedling special fertilizer obtained by the method to the crops in the seedling stage.

[0017] Preferably, the application is performed when the seedling grows to 10-30 cm.

[0018] Preferably, the application amount is 1-3 g / plant.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] The present application provides a seedling stage special fertilizer capable of crop drought resistance and promoting crop growth, wherein the added Euphorbia humifusa extract and seaweed extract are beneficial to the growth of crop seedling roots under drought stress, improve the water absorption and utilization capacity of crops; the added compound microbial agent can increase the number of beneficial microorganisms in the soil and secrete nutrient substances (such as glutamic acid) beneficial to the growth of crop seedlings, improve the drought resistance of crop seedlings; proline as an important stress amino acid can promote the maintenance of water balance by adjusting the osmotic pressure of plants, promote the activity of antioxidant enzymes, and enhance the antioxidant capacity of plants; calcium lignosulfonate can bind nutrients and promote root growth, improve nutrient absorption efficiency, and is also beneficial to fertilizer granulation, promote disintegration, and enhance the slow-release effect; glutamic acid diacetate tetrasodium can help crops absorb trace elements in the soil, promote crop growth and development, and improve the bioavailability of fertilizers.

[0021] The seedling stage special fertilizer provided by the present application is suitable for corn, soybean, wheat, flax, sorghum and other crops, and can significantly improve the drought resistance and biological accumulation of crop seedlings. The present application provides a simple, economical and effective solution for crop drought resistance cultivation, and has good market application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0023] Figure 1 Statistical results of average plant height of corn seedlings in different treatment groups;

[0024] Figure 2 Statistical results of average dry weight per plant of corn seedlings in different treatment groups;

[0025] Figure 3 Statistical results of average plant height of soybean seedlings in different treatment groups;

[0026] Figure 4 Statistical results of average dry weight per plant of soybean seedlings in different treatment groups;

[0027] Figure 5 Statistical results of average plant height of sorghum seedlings in different treatment groups;

[0028] Figure 6 Statistical results of average dry weight per plant of sorghum seedlings in different treatment groups;

[0029] Figure 7Statistical results of average plant height of wheat seedlings in different treatment groups;

[0030] Figure 8 Statistical results of average dry weight per plant of wheat seedlings in different treatment groups;

[0031] Figure 9 Statistical results of average plant height of flax seedlings in different treatment groups;

[0032] Figure 10 Statistical results of average dry weight per plant of flax seedlings in different treatment groups;

[0033] Figure 11 Growth state of soybean seedlings in the comparative example 1 group (left) and the experimental group (right);

[0034] Figure 12 Growth state of corn seedlings in the comparative example 1 group (left) and the experimental group (right);

[0035] Figure 13 Growth state of wheat seedlings in the comparative example 1 group (left) and the experimental group (right);

[0036] Figure 14 Growth state of flax seedlings in the comparative example 1 group (left) and the experimental group (right);

[0037] Figure 15 Growth state of sorghum seedlings in the comparative example 1 group (left) and the experimental group (right). DETAILED DESCRIPTION

[0038] The application provides a seedling special fertilizer for improving drought resistance and promoting growth of crops, which comprises the following components in mass fraction: 60-100 parts of compound fertilizer, 5-15 parts of water centipede grass extract, 5-10 parts of seaweed extract, 3-7 parts of compound microbial agent, 2-6 parts of proline, 0.1-0.3 parts of calcium lignosulfonate and 0.1-0.3 parts of tetrasodium glutamate diacetate.

[0039] In the application, the seedling special fertilizer preferably comprises the following components in mass fraction: 70-90 parts of compound fertilizer, 8-12 parts of water centipede grass extract, 7-9 parts of seaweed extract, 4-6 parts of compound microbial agent, 3-5 parts of proline, 0.15-0.25 parts of calcium lignosulfonate and 0.15-0.25 parts of tetrasodium glutamate diacetate; further preferably comprises the following components in mass fraction: 80 parts of compound fertilizer, 10 parts of water centipede grass extract, 8 parts of seaweed extract, 5 parts of compound microbial agent, 4 parts of proline, 0.2 parts of calcium lignosulfonate and 0.2 parts of tetrasodium glutamate diacetate.

[0040] In the present application, the ratio of nitrogen, phosphorus and potassium in the compound fertilizer is 13-17: 18-22: 13-17, preferably 14-16: 19-21: 14-16, and further preferably 15: 20: 15.

[0041] In the present application, the compound microbial agent comprises Bacillus subtilis, Bacillus velezensis and arbuscular mycorrhizal fungi, and the mass ratio is 1.5-2.5: 0.8-1.2: 0.8-1.2, preferably 1.8-2.2: 0.9-1.1: 0.9-1.1, and further preferably 2: 1: 1.

[0042] The present application provides a preparation method of the special fertilizer for seedling stage.

[0043] The present application provides the application of the special fertilizer for seedling stage or the special fertilizer for seedling stage obtained by the method in improving drought resistance of crops and / or promoting growth of crops.

[0044] In the present application, the crops include corn, soybean, wheat, flax and sorghum.

[0045] The present application provides a method for improving drought resistance of crops and / or promoting growth of crops, which comprises applying the special fertilizer for seedling stage or the special fertilizer for seedling stage obtained by the method in the seedling stage of crops.

[0046] In the present application, the fertilizer is applied when the seedling of crops grows to 10-30 cm, preferably 15-25 cm, and further preferably 20 cm.

[0047] In the present application, the application amount is 1-3 g / plant, preferably 1.5-2.5 g / plant, and further preferably 2 g / plant.

[0048] The technical solutions provided by the present application will be described in detail below in combination with examples, but they should not be understood as limiting the scope of protection of the present application.

[0049] The water slug grass extract used in the following examples is purchased from Shaanxi Lvsengyuan Biological Product Manufacturing Co., Ltd.; the seaweed extract is purchased from Xi'an Baisite Biological Technology Co., Ltd.; the Bacillus subtilis is purchased from Shandong Youfa Chemical Co., Ltd.; the Bacillus velezensis is purchased from Beina Biological-He'nan Industrial Microbial Strain Engineering Technology Research Center, with the number BNCC188043; and the arbuscular mycorrhizal fungi (Glomus) is from Beijing Academy of Agriculture and Forestry Sciences, Institute of Plant Nutrition and Resource.

[0050] Example 1

[0051] A preparation method of a special fertilizer for seedling stage, comprising the following steps:

[0052] The seedling-specific fertilizer is obtained by mixing 60 parts of compound fertilizer (N:P:K=15:20:15), 5 parts of water centipede grass extract, 5 parts of seaweed extract, 3 parts of composite microbial agent, 2 parts of proline, 0.1 part of calcium lignin sulfonate, and 0.1 part of tetrasodium glutamate diacetate, based on mass.

[0053] The composite microbial agent is obtained by mixing Bacillus subtilis, Bacillus velezensis and arbuscular mycorrhizal fungi in a mass ratio of 1.5:0.8:0.8.

[0054] Example 2

[0055] A method for preparing a special fertilizer for the seedling stage comprises the following steps:

[0056] The seedling-specific fertilizer is obtained by mixing 100 parts of compound fertilizer (N:P:K=15:20:15), 15 parts of water centipede grass extract, 10 parts of seaweed extract, 7 parts of composite microbial agent, 6 parts of proline, 0.3 parts of calcium lignin sulfonate, and 0.3 parts of tetrasodium glutamate diacetate, in parts by mass.

[0057] The composite microbial agent is obtained by mixing Bacillus subtilis, Bacillus velezensis and arbuscular mycorrhizal fungi in a mass ratio of 2.5:1.2:1.2.

[0058] Example 3

[0059] A method for preparing a special fertilizer for the seedling stage comprises the following steps:

[0060] The seedling-specific fertilizer is obtained by mixing 80 parts of compound fertilizer (N:P:K=15:20:15), 10 parts of water centipede grass extract, 8 parts of seaweed extract, 5 parts of composite microbial agent, 4 parts of proline, 0.2 parts of calcium lignin sulfonate, and 0.2 parts of tetrasodium glutamate diacetate, in parts by mass.

[0061] The composite microbial agent is obtained by mixing Bacillus subtilis, Bacillus velezensis and arbuscular mycorrhizal fungi in a mass ratio of 2:1:1.

[0062] Comparative Example 1

[0063] The difference between this comparative example and Example 3 is that this comparative example uses an equal amount of seaweed extract instead of water centipede grass extract, and the remaining steps are the same as Example 3.

[0064] Comparative Example 2

[0065] The difference between this comparative example and Example 3 is that the composite microbial agent used in this comparative example is different from that in Example 3. The composite microbial agent in this comparative example is obtained by mixing Bacillus subtilis and Bacillus velezensis in a mass ratio of 2:1, and no arbuscular mycorrhizal fungi are added.

[0066] Comparative Example 3

[0067] The difference between the present comparative example and Example 3 is that the present comparative example does not add seaweed extract and proline, and the rest of the steps are the same as those of Example 3.

[0068] Experimental Example

[0069] Corn, soybean, wheat, flax and sorghum were used as test materials to verify the effect of the seedling special fertilizer prepared in Example 3 on improving drought resistance and promoting crop growth.

[0070] Crop seedlings with similar growth were selected and divided into an experimental group, a control group, a comparative example 1 group, a comparative example 2 group and a comparative example 3 group. The crop seedlings in the control group were normally watered to keep the soil water content at about 70%; the crop seedlings in the rest of the treatment groups were subjected to drought stress to keep the soil water content at about 40%. After one week of pretreatment under the above water supply conditions, the seedling special fertilizer prepared in the experimental group and comparative examples 1-3 was applied; the control group was applied with compound fertilizer (N:P:K = 15:20:15). The application amount was 2 g / plant. After application, the above water supply conditions were continued for 20 days.

[0071] After 20 days, the average plant height and average dry weight per plant of the crop seedlings in each treatment group were counted, and the results are shown in Table 1. Figures 1-10 As can be seen, the seedling special fertilizer prepared in the present application can significantly improve the average plant height and dry weight of different crop seedlings under drought stress conditions compared with comparative examples 1-3, indicating that all components of the seedling special fertilizer of the present application can synergistically improve the drought resistance and growth ability of crops as a whole.

[0072] At the same time, the growth of the crop seedlings in the experimental group and comparative example 1 was compared, and the results are shown in Table 2. Figures 11-15 As can be seen, the application of the seedling special fertilizer prepared in the present application is conducive to maintaining the normal growth state of the crop seedlings.

[0073] The above only describes the preferred embodiments of the present application, and it should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A special fertilizer for the seedling stage for improving crop drought resistance and promoting growth, characterized in that: The invention comprises the following components in parts by mass: 60-100 parts of compound fertilizer, 5-15 parts of water centipede grass extract, 5-10 parts of seaweed extract, 3-7 parts of composite microbial agent, 2-6 parts of proline, 0.1-0.3 parts of calcium lignin sulfonate, and 0.1-0.3 parts of tetrasodium glutamate diacetate; The composite microbial agent comprises Bacillus subtilis, Bacillus velez and arbuscular mycorrhizal fungi, with a mass ratio of 1.5-2.5:0.8-1.2:0.8-1.

2.

2. The special fertilizer for seedling stage as claimed in claim 1, wherein The ratio of nitrogen, phosphorus and potassium in the compound fertilizer is 13-17:18-22:13-17.

3. A method for preparing the special fertilizer for seedling stage according to claim 1 or 2, characterized in that: The components in the formula amounts are mixed to obtain the special fertilizer for the seedling stage.

4. Use of the special fertilizer for seedling stage according to claim 1 or 2 or the special fertilizer for seedling stage obtained by the method according to claim 3 in improving the drought resistance of crops and promoting crop growth.

5. The use according to claim 4, characterized in that The crops include corn, soybeans, wheat, flax and sorghum.

6. A method for improving crop drought resistance and promoting crop growth, characterized in that: The seedling-specific fertilizer according to claim 1 or 2 or the seedling-specific fertilizer obtained by the method according to claim 3 is applied during the crop seedling stage.

7. The method according to claim 6, wherein Fertilize when the crop seedlings grow to 10-30 cm.

8. The method according to claim 7, wherein The application amount of the special fertilizer for the seedling stage is 1-3 g / plant.

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