Rice seedling raising substrate as well as preparation method and application thereof

Abstract

The invention discloses a rice seedling raising substrate as well as a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing peat and vermiculite according to a volume ratio of (4-6): (1-2) to obtain a basic rice seedling raising substrate; the method comprises the following steps: soaking seeds of one of allelopathic rice No.8, Huafeng rice No.1 or Liaoning japonica rice No.9, accelerating germination, culturing in a germination box, holding clear water in the germination box, culturing in a climate chamber, and collecting root exudates in a water culture growth solution; seeds of allelopathic rice No.3 are sown in the basic rice seedling raising substrate and irrigated with the root exudates hydroponic growth solution, water is supplemented regularly, and rice seedlings of the allelopathic rice No.3 are obtained; the rice seedling raising substrate can effectively play a role in strengthening seedlings through seedling tray seedling raising, and various physiological indexes of the rice seedling stage and physicochemical properties of soil are improved; the rice seedling raising substrate can effectively enhance the physiological performance of the overground part of rice and reduce root competition, so that the purpose of optimizing resource allocation is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of seedling raising substrates, and in particular to a rice seedling raising substrate and a preparation method and application thereof. Background Art

[0002] Seedling cultivation is an important technical link in the rice cultivation process, which refers to the entire operation process from sowing to transplanting. Rice can be sown directly or transplanted, but the mainstream is still seedling transplanting. The main seedling cultivation methods in my country include ground bed seedling cultivation, nutrient soil seedling cultivation, plastic pot seedling cultivation, matrix seedling cultivation, etc., among which matrix seedling cultivation has become the mainstream method of industrialization in my country's seedling industry. Traditional rice seedling matrix is ​​mostly made of non-renewable resources such as peat, vermiculite, perlite, etc. As a result of protecting the ecological environment, many scholars have carried out a lot of research on new seedling matrix and formed corresponding rice seedling matrix formula. Among many crops, rice has a particularly large demand for seedling matrix, and a good seedling matrix should not only meet the nutritional growth of rice seedlings, but also have a certain promoting effect on its disease resistance, especially a series of diseases such as wilt. In this regard, the existing technology often responds to the threat of rice diseases by adding chemical pesticides or biocontrol agents to the seedling medium. The use of pesticides is no longer appropriate, and the control effect of biocontrol agents is difficult to stabilize, which has created a great obstacle to the prevention and control of rice seedling diseases in the seedling stage.

[0003] Therefore, in view of the above problems, the present invention provides a rice seedling raising substrate and a preparation method and application thereof. The rice seedling raising substrate of the present invention can effectively strengthen the seedlings through seedling tray cultivation. Summary of the invention

[0004] The purpose of the invention is to provide a rice seedling raising substrate and a preparation method and application thereof, so as to fill the blank of the current technology.

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

[0006] A rice seedling raising substrate comprises, by volume, 4-6 parts of peat, 1-2 parts of vermiculite and 0.8-1 part of a hydroponic solution of rice root secretions.

[0007] Preferably, the rice seed variety of the rice root exudate hydroponic solution includes one of Allelopathic Rice No. 3 and Allelopathic Rice No. 8 or Huafeng Rice No. 1 or Liaojing No. 9.

[0008] Preferably, the kinship of the allelopathic rice series varieties in the rice root exudate hydroponic solution includes: self: Allelopathic Rice No. 3; relatives: Allelopathic Rice No. 3, Allelopathic Rice No. 8; non-relatives within the subspecies: Allelopathic Rice No. 3, Huafeng Rice No. 1; non-relatives between subspecies: Allelopathic Rice No. 3, Liaojing No. 9.

[0009] The present application also provides a method for preparing the above-mentioned rice seedling raising substrate, comprising the following steps:

[0010] (1) uniformly mixing peat and vermiculite in a volume ratio of 4-6:1-2 to obtain a basic rice seedling medium;

[0011] (2) soaking and germinating one of the rice seeds of Allelopathic Rice No. 8, Huafeng Rice No. 1 or Liaojing Rice No. 9, respectively, and culturing them in germination boxes filled with clean water in a climate chamber for 20 to 23 days, and collecting the root secretions and hydroponic growth solution;

[0012] (3) The seeds of Allelopathic Rice No. 3 were sown in the basic rice seedling medium, irrigated with the hydroponic growth solution of root secretions, and water was added regularly. After 20 to 23 days, the rice seedlings of Allelopathic Rice No. 3 were obtained.

[0013] Preferably, the seed variety of the root exudate hydroponic growth solution has a different genetic relationship with Allelopathic Rice No. 3.

[0014] The present application also provides an application of the rice seedling raising matrix prepared by the above-mentioned rice seedling raising matrix or the preparation method of the above-mentioned rice seedling raising matrix.

[0015] Due to the application of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0016] 1. The rice seedling raising substrate of the present invention can effectively strengthen the rice seedlings through seedling tray raising, and improve various physiological indicators of the rice seedlings and the physical and chemical properties of the soil;

[0017] 2. The rice seedling raising substrate of the present invention can effectively enhance the physiological performance of the aboveground part of rice and reduce root competition, thereby achieving the purpose of optimizing resource allocation. DETAILED DESCRIPTION

[0018] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, a specific implementation scheme is now described in detail.

[0019] The present invention is further described below in conjunction with the embodiments, but the present invention is not limited to the following embodiments. The implementation conditions used in the embodiments can be further adjusted according to the different requirements of specific use, and the implementation conditions not indicated are conventional conditions in the industry. The technical features involved in each embodiment of the present invention can be combined with each other as long as they do not conflict with each other.

[0020] Example 1

[0021] This embodiment provides a rice seedling raising substrate and a preparation method thereof, comprising the following steps:

[0022] (1) evenly mixing peat and vermiculite in a volume ratio of 4:1 to obtain a basic rice seedling medium;

[0023] (2) After soaking and germinating, the rice seeds of Allelopathic Rice No. 8 were placed in germination boxes filled with clean water and cultured in a climate chamber for 20 days, and the root secretions and hydroponic growth solution were collected;

[0024] (3) Sow the seeds of Allelopathic Rice No. 3 in the basic rice seedling medium, irrigate with 1 portion of hydroponic growth solution of root secretions, replenish water regularly, and obtain Allelopathic Rice No. 3 rice seedlings after 20 days.

[0025] Example 2

[0026] This embodiment provides a rice seedling raising substrate and a preparation method thereof, comprising the following steps:

[0027] (1) evenly mixing peat and vermiculite in a volume ratio of 4:1 to obtain a basic rice seedling medium;

[0028] (2) After soaking and germinating the rice seeds of Huafeng Rice No. 1, the seeds were placed in germination boxes filled with clean water and cultured in a climate chamber for 20 days, and the root secretions and hydroponic growth solution were collected;

[0029] (3) Sow the seeds of Allelopathic Rice No. 3 in the basic rice seedling medium, irrigate with 1 portion of hydroponic growth solution of root secretions, replenish water regularly, and obtain Allelopathic Rice No. 3 rice seedlings after 20 days.

[0030] Example 3

[0031] This embodiment provides a rice seedling raising substrate and a preparation method thereof, comprising the following steps:

[0032] (1) evenly mixing peat and vermiculite in a volume ratio of 4:1 to obtain a basic rice seedling medium;

[0033] (2) After soaking and germinating the rice seeds of Liaojing No. 9, the seeds were placed in germination boxes filled with clean water and cultured in a climate chamber for 20 days, and the root secretions and hydroponic growth solution were collected;

[0034] (3) Sow the seeds of Allelopathic Rice No. 3 in the basic rice seedling medium, irrigate with 1 portion of hydroponic growth solution of root secretions, replenish water regularly, and obtain Allelopathic Rice No. 3 rice seedlings after 20 days.

[0035] Comparative Example 1

[0036] This comparative example provides a rice seedling raising substrate and a preparation method thereof, comprising the following steps:

[0037] (1) evenly mixing peat and vermiculite in a volume ratio of 4:1 to obtain a basic rice seedling medium;

[0038] (2) Sow the seeds of Allelopathic Rice No. 3 in the basic rice seedling medium, irrigate with 1 portion of clean water, and replenish water regularly. After 20 days, the rice seedlings of Allelopathic Rice No. 3 were obtained.

[0039] Application of the rice seedling substrate prepared in the above examples and comparative examples:

[0040] The rice seedling substrates prepared in the above Examples 1 to 3 and Comparative Example 1 were verified for their effects at the test base of the Institute of Organic Recycling of China Agricultural University (Suzhou). Seedlings were grown in rice seedling trays using the rice seedling substrates, and the substrates irrigated with pure water were used as blank controls. Each example and control example were repeated 3 times. After 20 days of seedling cultivation, rice seedlings were randomly selected for determination of physiological growth indicators. The test results of the physiological growth indicators of rice seedlings are shown in Table 1. The statistical results of soil nutrient content are shown in Table 2.

[0041] Table 1

[0042] Test items Example 1 Example 2 Example 3 Comparative Example 1 Plant height / cm 0.38 0.3 0.31 0.33 Stem diameter / cm 0.19 0.15 0.14 0.17 Total root length / cm 168.34 197.06 236.42 199.44 Chlorophyll / SPAD 13.41 11.34 12.27 11.86 <![CDATA[Total root area / cm 2 > 20.55 22.82 24.57 25.06 Fresh weight of aboveground parts / g 39.7 42.3 34.6 24.5 Fresh weight of underground parts / g 46.3 47.6 40.9 36.8 Aboveground dry weight / g 27.8 29.6 24.2 17.1 Underground dry weight / g 37.1 38.1 32.3 29.4 Seedling index 3.81 3.32 3.43 3.21 Root activity μg / g 21.4 22.1 18.4 11.1

[0043] Table 2

[0044] Test items Alkaline nitrogen mg / kg Available phosphorus mg / kg Available potassium mg / kg Example 1 317.57 0.35 3.4 Example 2 327.83 0.33 2.86 Example 3 306.6 0.39 3.44 Comparative Example 1 313.6 0.32 3.03

[0045] It can be seen from the above test results that the rice seedling substrate technology method of the present invention has an obvious effect of promoting the growth of rice seedlings, has a good effect on the growth of the aboveground part and the development of the underground root system, and at the same time, it also has a certain improvement effect on the physical and chemical properties of the soil.

[0046] In summary, the rice seedling raising substrate of the present invention can effectively enhance the physiological performance of the aboveground part of rice and reduce root competition, thereby achieving the purpose of optimizing resource allocation.

[0047] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A rice seedling raising substrate, characterized in that: Calculated by volume, it includes: 4-6 parts of peat, 1-2 parts of vermiculite, and 0.8-1 part of rice root secretion hydroponic solution.

2. A rice seedling raising substrate as claimed in claim 1, characterized in that: The rice seed variety of the rice root exudate hydroponic solution includes one of Allelopathic Rice No. 3 and Allelopathic Rice No. 8 or Huafeng Rice No. 1 or Liaojing No.

9.

3. A rice seedling raising substrate as claimed in claim 1, characterized in that: The kinship of allelopathic rice series varieties in the rice root exudate hydroponic solution includes: self: Allelopathic Rice No. 3; relatives: Allelopathic Rice No. 3, Allelopathic Rice No. 8; non-relatives within the subspecies: Allelopathic Rice No. 3, Huafeng Rice No. 1; non-relatives between subspecies: Allelopathic Rice No. 3, Liaojing No.

9.

4. The method for preparing a rice seedling culture medium according to any one of claims 1 to 3, characterized in that: The steps include: (1) uniformly mixing peat and vermiculite in a volume ratio of 4-6:1-2 to obtain a basic rice seedling medium; (2) soaking and germinating one of the rice seeds of Allelopathic Rice No. 8, Huafeng Rice No. 1 or Liaojing Rice No. 9, respectively, and culturing them in germination boxes filled with clean water in a climate chamber for 20 to 23 days, and collecting the root secretions and hydroponic growth solution; (3) The seeds of Allelopathic Rice No. 3 were sown in the basic rice seedling medium, irrigated with the hydroponic growth solution of root secretions, and water was added regularly. After 20 to 23 days, the rice seedlings of Allelopathic Rice No. 3 were obtained.

5. The method for preparing a rice seedling culture medium according to claim 4, characterized in that: The seed variety of the root exudate hydroponic growth solution has a different genetic relationship with Allelopathic Rice No.

3.

6. Use of the rice seedling raising matrix prepared by the rice seedling raising matrix according to any one of claims 1 to 3 or the method for preparing the rice seedling raising matrix according to any one of claims 4 to 5.