Early season rice or ratooning rice seedling ralstonia solanacearum rescuing method

Abstract

The invention discloses an early season rice or ratooning rice seedling withering rescue method, and relates to the technical field of agricultural planting, and the method comprises the following steps: S1, adopting a moisturizing measure to supplement water for early season rice and ratooning rice seedling withering and death caused by low temperature sunny conversion or film uncovering during seedling raising; s2, spraying an amino acid water-soluble fertilizer or a natural plant growth regulator on leaf surfaces to increase nutrition; s3, a bactericide metalaxyl hymexazol is applied to leaf surfaces to prevent disease epidemic caused by humidity increase and prevent damping-off. According to the method disclosed by the invention, by adopting water supplementing, nutrition and disease prevention measures, the problems of unbalanced water supply and demand and easy withering and death of seedlings caused by low root activity, poor fertilizer absorption and water absorption capacities after low-temperature influence, and high water loss rate of leaves during sunny and film uncovering are solved, a large number of early rice seedlings are saved, the seedling raising loss is reduced, and the seedling raising cost is reduced. And the method also plays a positive role in guaranteeing the full-year grain harvest.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural planting, and in particular to a method for rescuing early rice or regenerated rice seedlings from withering. Background Art

[0002] Bacterial wilt is a physiological disease that often occurs after the three-leaf stage. The leaves turn green, there are no water droplets on the tips of the leaves, they curl, and the heart leaves become tube-shaped. In severe cases, the entire rice seedling dies.

[0003] Symptoms of bacterial wilt include leaves that appear bluish-gray, stems that shrivel and shrink, becoming barren, and eventually dying. Causes of the disease include: Tall seedlings with underdeveloped root systems, which can lead to rapid temperature increases when the film is removed for hardening or weather changes, accelerating leaf transpiration and insufficient or poor water absorption by the roots, causing leaf dehydration and a bluish-gray appearance; uneven spacing in the seedbed prevents roots from absorbing water, leading to physiological water deficiency; or seedlings are exposed to extreme low temperatures, which damage the protoplasm, increase permeability, and reduce water-holding capacity; and when temperatures rise after a cold spell, leaf transpiration increases, soil temperatures drop, and water absorption is poor, leading to physiological water loss and dryness.

[0004] If the seedlings are infected with bacterial wilt and are not treated with the correct measures, the seedlings may die easily, which will not only cause direct economic losses to farmers during the seedling cultivation period, but also indirectly affect the annual production plan. Summary of the Invention

[0005] The present invention aims to provide a method for rescuing early rice or regenerated rice seedlings from bacterial wilt, so as to solve the problem of bacterial wilt and death of rice seedlings caused by physiological water loss under conditions of drastic temperature changes in the early season.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A method for rescuing early rice or regenerated rice seedlings from withering, comprising the following steps:

[0008] S1. For early rice or ratoon rice seedlings that wither and die due to drastic temperature changes during seedling cultivation, moisturizing measures should be taken to replenish water.

[0009] S101. For factory-based greenhouse seedling cultivation, irrigation should be implemented where irrigation is possible; and multiple spraying should be used where irrigation is not possible.

[0010] S102. For rice seedling fields raised under mulch, if some leaves become withered and curled, water should be applied immediately to prevent the leaves from losing water rapidly.

[0011] S2. Spray amino acid water-soluble fertilizer or natural plant growth regulator on the leaves to increase nutrition;

[0012] S3. Apply the fungicide metalaxyl and carbendazim on the leaves to prevent the spread of diseases caused by increased humidity and to prevent the occurrence of damping-off disease.

[0013] Furthermore, in step S1, the moisturizing measures include water replenishment and moisturizing measures commonly used in the field of agricultural plant protection.

[0014] Furthermore, in step S2, the amino acid water-soluble fertilizer includes amino acids and trace elements of boron, zinc, manganese, copper, molybdenum and iron.

[0015] Furthermore, in step S2, the amount of the amino acid water-soluble fertilizer is 1200-1500 mL / hm2. 2 ;

[0016] Furthermore, in step S2, the natural plant growth regulators include Bihu and brassinolide.

[0017] Furthermore, the dosage of the natural plant growth regulator is 45g / hm 2 , diluted 20,000 times and sprayed.

[0018] Furthermore, in step S3, a 1000-fold dilution of 30% metalaxyl is used, with a dosage of 300-450 mL / hm2. 2 .

[0019] The principle and beneficial effects of this technical solution:

[0020] The present invention solves the problems of unbalanced water supply and demand and easy withering and death of seedlings caused by weak root vitality and poor fertilizer and water absorption capacity after the influence of low temperature, high water loss rate of leaves when sudden weather clears and the film is removed, by supplementing water, nutrition and disease prevention measures. It saves a large number of early rice seedlings, not only reduces the loss of seedling cultivation, but also plays a positive role in ensuring a good grain harvest throughout the year. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic flow chart of a method for rescuing early rice or ratoon rice seedlings from withering;

[0022] Figure 2 This is a schematic diagram of the withering of rice seedlings in Xizhou Cooperative in Xihu Management District;

[0023] Figure 3 This is a schematic diagram of the rice seedling restoration at Xizhou Cooperative in Xihu Management Area;

[0024] Figure 4 This is a schematic diagram of the withering of rice seedlings in Tanjiahe Village, Hangongdu Town, Dingcheng District;

[0025] Figure 5 This is a schematic diagram of rice seedling restoration in Tanjiahe Village, Hangongdu Town, Dingcheng District;

[0026] Figure 6 This is a diagram showing the withering of rice seedlings at the Egugang Rice Planting Professional Cooperative in Chengtoushan Town, Li County;

[0027] Figure 7 This is a schematic diagram of the seedling recovery of the Egugang Rice Planting Professional Cooperative in Chengtoushan Town, Li County. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0029] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the processing steps closely related to the solution according to the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0030] It should be emphasized that the term “include / comprises” when used herein refers to the existence of features, elements or steps, but does not exclude the existence or addition of one or more other features, elements or steps.

[0031] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0032] It should be emphasized here that the step marks mentioned below do not limit the order of the steps, but it should be understood that the steps can be executed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be executed simultaneously.

[0033] Example 1

[0034] refer to Figure 1 A method for rescuing early rice or regenerated rice seedlings from withering, comprising the following steps:

[0035] S1. To address the withering and death of seedlings caused by drastic temperature changes during early rice or ratoon rice seedling cultivation, commonly used water replenishment and moisture retention measures in the field of agricultural plant protection are adopted to treat seedlings under different conditions. Specifically:

[0036] S101. For factory-based greenhouse seedling cultivation, irrigation should be used for watering where irrigation is possible; and multiple spraying should be used for watering where irrigation is not possible.

[0037] S102. For rice seedling fields raised under mulch, if some leaves become withered and curled, water should be applied immediately to prevent the leaves from losing water rapidly.

[0038] S2. Spray amino acid water-soluble fertilizer or natural plant growth regulator on the leaves to increase nutrition;

[0039] Amino acid water-soluble fertilizers include amino acids and trace elements such as boron, zinc, manganese, copper, molybdenum, and iron. Use Changnongle or Fengruida brand amino acid water-soluble fertilizers at a dosage of 1200-1500 mL / hm2.2 Amino acid water-soluble fertilizer can be absorbed by leaves to quickly supplement plant nutrition, increase photosynthesis, and improve physiological functions.

[0040] Among them, natural plant growth regulators include Bihu and Brassinolide. Use Bihu natural plant growth regulator at a dosage of 45g / hm2. 2 , diluted 20,000 times for spraying, Bihu contains more than 30 kinds of plant active substances such as natural plant endogenous hormones, flavonoids and amino acids. Through system induction, it can activate the multiple activities of plants, make plants luxuriant and have developed root systems, and significantly improve plant resistance to stress (frost damage, drought, waterlogging, soil compaction, salinization, etc.) and disease and pest resistance.

[0041] S3. Apply the fungicide metalaxyl and carbendazim on the leaves to prevent the spread of diseases caused by increased humidity and to prevent the occurrence of damping-off disease. Use 30% metalaxyl diluted 1000 times, and use 300-450mL / hm2. 2 .

[0042] The specific implementation process is as follows:

[0043] Experimental Example 1

[0044] Implementation location: Xizhou Cooperative, Xihu Management District

[0045] For factory-based seedling cultivation in greenhouses, due to the thick soil cover during sowing, the seedlings showed a phenomenon of top cover when emerging. Although they were treated, the top cover affected the photosynthesis of the seedlings and their cold resistance was poor. Therefore, after the cold wave, the seedlings showed a phenomenon of withering at the same place as the "top cover" (reference Figure 2 After increasing the number of spraying to keep the moisture, spraying Changnongle amino acid water-soluble fertilizer and metalaxyl, the seedlings resumed growth (reference Figure 3 ).

[0046] Experimental Example 2

[0047] Implementation location: Tanjiahe Village, Hangongdu Town, Dingcheng District

[0048] For the field film-raised seedlings, wilt symptoms appeared when the weather suddenly cleared after a low temperature (reference Figure 4 ), follow this method to guide the irrigation of the rice paddies, spray the leaves with amino acid foliar fertilizer 1500ml / hm 2 , and 30% metalaxyl 300-450mL / hm 2 , the seedlings returned to normal (reference Figure 5 ).

[0049] Experimental Example 3

[0050] Implementation location: Zhang Hanxin, Huangjiapu Village, Qihe Town, Taoyuan County

[0051] On April 3, 2025, the hybrid early rice seedlings raised under plastic film in the field were reported to be fine, but the conventional early rice, due to the large seeding rate and large number of seedlings, showed obvious signs of wilt. The problematic seedlings were saved by irrigation from below and spraying with amino acid foliar fertilizer and metalaxyl.

[0052] Experimental Example 4

[0053] Implementation location: Egugang Rice Planting Professional Cooperative, Chengtoushan Town, Li County

[0054] On April 2, 2025, the seedlings showed signs of wilt (reference Figure 6 ), according to the technical solution provided by the present invention, spray 1500mL / hm2 of Changnongle amino acid water-soluble fertilizer 2 and 30% metalaxyl suspension 300-450mL / hm 2 On April 15, all the seedlings resumed growth (reference Figure 7 ).

[0055] Experimental Example 5

[0056] Implementation location: Fenghua Rice Cooperative, Taoyuan County

[0057] On March 16, 2025, rice varieties were sown in greenhouses using the factory-based seedling raising method: Zhongzao 83. On March 31, 2025, the weather turned sunny after three days of cooling. The number of water sprays was increased to reduce water loss from the leaves. 1500mL / hm2 of Changnongle amino acid water-soluble fertilizer was sprayed. 2 and 30% metalaxyl suspension 300-450mL / hm 2 Thanks to the timely and effective measures taken, all the seedlings were saved.

[0058] It should be understood that the present invention is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of brevity, a detailed description of known methods is omitted. In the above embodiments, several specific steps are described and illustrated as examples. However, the method of the present invention is not limited to the specific steps described and illustrated. Those skilled in the art may make various changes, modifications, and additions, or change the order of the steps after understanding the spirit of the present invention.

[0059] In the present invention, a feature described with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, and / or combined with or replace features of other embodiments.

[0060] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations to the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A method for rescuing early rice or regenerated rice seedlings from bacterial wilt, characterized in that: The following steps are involved: S1. For early rice or ratoon rice seedlings that wither and die due to drastic temperature changes during seedling cultivation, moisturizing measures should be taken to replenish water. S101. For factory-based greenhouse seedling cultivation, irrigation should be used for watering where irrigation is possible; and multiple spraying should be used for watering where irrigation is not possible. S102. For rice seedling fields raised under plastic film, if some leaves become withered and curled, water should be applied immediately. S2. Spray amino acid water-soluble fertilizer or natural plant growth regulator on the leaves to increase nutrition; S3. Apply the fungicide metalaxyl and carbendazim on the leaves to prevent the spread of diseases caused by increased humidity and to prevent the occurrence of damping-off disease.

2. The method for rescuing early rice or regenerated rice seedlings from bacterial wilt according to claim 1, characterized in that: In step S1, the moisturizing measures include water replenishment and moisturizing measures commonly used in the field of agricultural plant protection.

3. The method for rescuing early rice or regenerated rice seedlings from bacterial wilt according to claim 1, characterized in that: In step S2, the amino acid water-soluble fertilizer includes amino acids and trace elements of boron, zinc, manganese, copper, molybdenum and iron.

4. The method for rescuing early rice or regenerated rice seedlings from bacterial wilt according to claim 3, characterized in that: In step S2, the amount of amino acid water-soluble fertilizer is 1200-1500 mL / hm2. 2 .

5. The method for rescuing early rice or regenerated rice seedlings from bacterial wilt according to claim 1, characterized in that: In step S2, the natural plant growth regulators include Bihu and brassinolide.

6. The method for rescuing early rice or regenerated rice seedlings from bacterial wilt according to claim 1, characterized in that: The natural plant growth regulator is used in an amount of 45 g / hm2. 2 , diluted 20,000 times and sprayed.

7. The method for rescuing early rice or regenerated rice seedlings from bacterial wilt according to claim 1, characterized in that: In step S3, a 1000-fold dilution of 30% metalaxyl is used, with a dosage of 300-450 mL / hm2. 2 .

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