A method for breaking the hardness of Nitraria japonica seeds and increasing the germination rate

Abstract

The invention relates to a method for breaking the hardness of Nitraria japonica seeds and improving the germination rate. The specific steps of the method are: 1) preparing a mud suspension; 2) adding the Nitraria japonica seeds into the mud suspension in step 1), fully stirring, Evenly disperse the seeds in the slurry suspension to obtain the seed slurry suspension; 3) Pour the methanol solution into the seed slurry suspension in step 2), stir fully, keep room temperature, place, and perform a chemical reaction; 4) Put the step 3) Clean the seeds after the chemical reaction, soak them with gibberellin at a concentration of 0.2g / L-0.5g / L, and then sow directly. The highest germination rate of Nitraria japonica seeds treated by this method is 95.22%, which is better than that of the reference document, and it solves the problems of hot water treatment, concentrated sulfuric acid chemical treatment, sandpaper mechanical treatment and low-temperature freezing treatment to eliminate the hard solids of Nitraria japonica seeds. Defects.

Description

technical field [0001] The invention relates to the field of agriculture, in particular to a method for breaking the hardness of Nitraria japonica seeds and increasing the germination rate. Background technique [0002] The seeds of Nitraria japonica have a hard seed coat, which is a common form of seed dormancy. Under natural sowing, it is difficult to emerge and the emergence rate is insufficient. At present, common effective methods to break the dormancy of hard seeds mainly include: hot water treatment, chemical treatment with concentrated sulfuric acid, mechanical treatment with sandpaper, and low-temperature freezing treatment. [0003] In the prior art, "Journal of Mountain Agricultural Biology" 2011, volume 30, No. 4, discloses the research on the method for breaking the hard seeds of Nitraria japonica, and adopts 3 methods to pretreat the seeds of Nitraria japonica: sulfuric acid treatment, sodium hydroxide treatment and Soak in hot water, the specific method is: ...

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Problems solved by technology

[0023] 1) There are different effects and conclusions in different experiments. When directly treated with sulfuric acid, the concentration is too high or the treatment time is too long, which will cause the seed burn area to be too large, resulting in reduced or lost vitality.

[0024] 2) If the concentration is too low or the treatment time is too short, some seeds with dense seed coats will still remain firm, resulting in waste of seeds

[0025] 3) In the process of acid treatment, high concentration of sulfuric acid will pose a threat to the safety of operators, machinery and the environment

[0026] 4) During acid treatment, the seed coat of some non-hard seeds is damaged, and the sugar in the seed kernel reacts with sulfuric acid to produce furfural and water, which will cause imbibition or heat generation of the treated seeds, resulting in loss of vitality

[0027] 5) It is easy to cause pollution to the environment

[0028] 2. Seed soaking treatment in hot water: the ideal time length of constant high temperature treatment cannot be guaranteed during the operation process, and the germination rate is low

[0029] 3. Sandpaper mechanical treatment: it is not easy to operate, and it is time-consuming and labor-intensive. At the same time, the seed coat will be worn out due to improper operation.

[0030] 4. Low-temperature freezing treatment: the effect of breaking the seed coat of different seeds is inconsistent, and it is difficult to popularize

[0031] 5. Hormone treatment: Hormone treatment alone cannot directly break the hard condition of Nitraria japonica seeds, and has no significant effect on promoting seed germination

[0032] 6. Sodium hydroxide treatment: easy to deliquescence, strong alkali substances will damage the seeds, and the effect of improving the germination rate is general

[0033] 7. Hydrogen peroxide treatment: the effect of promoting seed germination is not significant

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